Patent Publication Number: US-2017351043-A1

Title: Optical package using v-shaped or curved reflector, and method for manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     A claim for priority under 35 U.S.C. §119 is made to Korean Patent Application No. 10-2016-0070224 filed Jun. 7, 2016, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     The inventive concept relates to an optical package including a reflector, and more particularly to a technology of efficiently transmitting, receiving, or coupling light waves by arranging a reflector having a V-shaped or curved structure on or over a light source or a photodetector to decrease divergence of the light waves or to fix an incidence angle of the light waves. 
     In an optical package according to the related art, an optical waveguide and a photodetector are optically coupled at a low coupling efficiency due to a divergence effect of light waves radiated from a light source. 
     Accordingly, an optical package technology that uses a transmission path expander that is additionally provided on or over a substrate in which a light source is arranged has been developed. In Korean Patent No. 10-1480025, a transmission path expander includes an optical fiber, which is optically aligned with a light source arranged on or over a substrate to decrease divergence of light waves. 
     However, in the optical package technology using a transmission path expander, because a process of forming and manufacturing a transmission path expander is very complex, process costs are high and process time is long. 
     Accordingly, the following embodiments suggest technologies for decreasing divergence of light waves, and lowering the complexity of processes and costs of an optical package and shortening process time by arranging a simple reflector for fixing an incident angle of the light waves. 
     SUMMARY 
     The inventive concept provides an optical package including a simple reflector that decreases divergence of light waves and fixes an incident angle of light waves, and a method for manufacturing the same. 
     In detail, the inventive concept provides an optical package that includes a reflector having a V-shaped or curved form to decrease divergence of light waves and fixes an incident angle of waves, and a method for manufacturing the same. 
     In particular, the inventive concept provides an optical package that, when a reflector that has a form having a parabolic surface is provided, efficiently transmits light waves by using a principle that, when light waves radiated from a light source arranged at a focus of a parabolic surface are reflected by the parabolic surface, the light waves always travel in parallel to each other, and a method for manufacturing the same. 
     In particular, the inventive concept provides an optical package that, when a reflector that has a form having an elliptical surface is provided, efficiently transmits light waves by using a principle that, when light waves radiated from a light source arranged at a focus of an elliptical are reflected by the elliptical surface, the light waves always travel toward another focus of the elliptical surface, and a method for manufacturing the same. 
     Further, the inventive concept provides an optical package that, when a reflector having a V-shaped form is provided, efficiently transmits light waves by using a principle in which incident angles of light waves reflected twice by the V-shaped surface are determined according to an angle formed by the V-shaped form, and a method for manufacturing the same. 
     According to an embodiment, an optical package includes a substrate including any one of a photodetector or an optical grating coupler and a light source, and a reflector arranged on or over the substrate to reflect light waves radiated from the light source and transmit the reflected light waves to any one of the photodetector or the optical grating coupler. 
     The reflector may have any one of a form having two parabolic surfaces, an elliptical form, or a V-shaped form. 
     When the reflector has the form having the two parabolic surfaces, the light source is arranged at a focus of a first parabolic surface of the reflector, and any one of the photodetector or the optical grating coupler may be arranged at a focus of a second parabolic surface of the reflector, or may be arranged at a location at which the light waves radiated from the light source converge after being reflected twice by the first parabolic surface and the second parabolic surface. 
     When the reflector has the elliptical form, the light source may be arranged at a focus of the elliptical surface of the reflector, and any one of the photodetector or the optical grating coupler may be arranged at a location at which the light waves radiated from the light source converge after being reflected by the elliptical surface. 
     When the reflector has the V-shaped form, any one of the photodetector or the optical grating coupler may be arranged on or over the substrate based on a location at which the light source is arranged on or over the substrate and an angle formed by the V-shaped form, or may be arranged at a location at which the light waves radiated from the light source converge after being reflected twice by the V-shaped surface of the reflector. 
     According to another embodiment, an optical package includes a substrate including any one of a photodetector or a light source, and a parabolic surface reflector arranged on or over the substrate and including any one of an optical fiber or an optical waveguide, and the parabolic surface reflector reflects light waves radiated from the light source to transmit the reflected light waves to any one of the optical fiber or the optical waveguide or reflects the light waves, which travels in any one of the optical fiber or the optical waveguide, to transmit the reflected light waves to the photodetector. 
     Any one of the light source or the photodetector may be arranged at a focus of the parabolic surface of the parabolic surface reflector. 
     According to an embodiment, a method for manufacturing an optical package includes providing any one of a photodetector or an optical grating coupler and a light source on or over a substrate, and arranging a reflector on or over the substrate, the reflector being configured to reflect light waves radiated from the light source to transmit the reflected light waves to any one of the photodetector or the optical grating coupler, and the reflector has any one of a form having two parabolic surfaces, an elliptical form, or a V-shaped form. 
     When the reflector has the form having the two parabolic surfaces, the providing of any one of the photodetector or the optical grating coupler and a light source may include arranging the light source at a focus of a first parabolic surface of the reflector, and arranging any one of the photodetector or the optical grating coupler at a focus of the second parabolic surface of the reflector. 
     When the reflector has the elliptical form, the providing of any one of the photodetector or the optical grating coupler and a light source on or over a substrate includes arranging the light source at a focus of the elliptical surface of the reflector, and arranging any one of the photodetector or the optical grating coupler at a location at which the light waves radiated from the light source converge after being reflected by the elliptical surface. 
     When the reflector has the V-shaped form, the providing of any one of the photodetector or the optical grating coupler and a light source on or over a substrate may include arranging the light source at an arbitrary location on the substrate, and arranging any one of the photodetector or the optical grating coupler on the substrate based on a location at which the light source is arranged on the substrate and an angle formed by the V-shaped form. 
     According to an embodiment, a method for manufacturing an optical package includes providing any one of a photodetector or a light source on or over a substrate, and arranging a parabolic surface reflector including any one of an optical fiber or an optical waveguide on or over the substrate, and the parabolic surface reflector reflects light waves radiated from the light source to transmit the reflected light waves to any one of the optical fiber or the optical waveguide or reflects the light waves, which travels in any one of the optical fiber or the optical waveguide, to transmit the reflected light waves to the photodetector. 
     The providing of any one of the photodetector or the light source may include arranging any one of the photodetector or the light source at a focus of the parabolic surface of the parabolic surface reflector. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       The above and other objects and features will become apparent from the following description with reference to the following figures, wherein like reference numerals refer to like parts throughout the various figures unless otherwise specified, and wherein: 
         FIG. 1  is a concept view for explaining the principle of an optical package according to an embodiment; 
         FIGS. 2A and 2B  are views illustrating an optical package according to an embodiment; 
         FIG. 3  is a view illustrating an optical package that is modified based on the optical package of  FIGS. 2A and 2B ; 
         FIG. 4  is a view illustrating an optical package that is modified differently from the optical package of  FIG. 3 , based on the optical package of  FIGS. 2A and 2B ; 
         FIG. 5  is a concept view for explaining the principle of another optical package according to an embodiment; 
         FIG. 6  is a view illustrating an optical package according to another embodiment; 
         FIG. 7  is a concept view for explaining the principle of an optical package according to another embodiment; 
         FIG. 8  is a view illustrating an optical package according to another embodiment; 
         FIG. 9  is a view illustrating a method for manufacturing an optical package according to an embodiment; and 
         FIG. 10  is a view illustrating a method for manufacturing an optical package according to another embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments of the inventive concept will be described in detail with reference to the accompanying drawings. However, the inventive concept is neither limited nor restricted by the embodiments. Further, the same reference numerals in the drawings denote the same members. 
     Furthermore, the terminologies used herein are used to properly express the embodiments of the inventive concept, and may be changed according to the intentions of the user or the manager or the custom in the field to which the inventive concept pertains. Therefore, definition of the terms should be made according to the overall disclosure set forth herein. 
       FIG. 1  is a concept view for explaining the principle of an optical package according to an embodiment. 
     Referring to  FIG. 1 , an optical package according to an embodiment includes a reflector  110  that has a form having two parabolic surfaces. Here, the reflector  110  includes a first parabolic surface  120 , a second parabolic surface  130 , and a straight area  140 , and the term “a parabolic surface” used herein may mean that a reflective surface has at least one parabolic section. Further, the term “a parabolic surface” may mean that a two-dimensional reflective surface is a paraboloidal surface. 
     Then, a focus f  121  of the first parabolic surface  120  according to a parabola equation of 4px=y 2  for a virtual coordinate system x and y is located at a distance that is spaced apart from an apex of the first parabolic surface  120  by p. Similarly, a focus f  131  of the second parabolic surface  130  is also located at a distance that is spaced apart from an apex of the second parabolic surface  130  by p. 
     Accordingly, when light waves  150  radiated from a light source arranged at the focus  121  of the first parabolic surface  120  of the reflector  110  are reflected by the first parabolic surface  120 , first reflective light waves  151  always travel in parallel to each other, and the first reflective light waves  151  that travel in parallel converge at the focus  131  of the second parabolic surface  130  after being reflected by the second parabolic surface  130  (second reflective light waves  152  reflected by the second parabolic surface  130  converge at the focus  131  of the second parabolic surface  130 ). 
     Accordingly, the optical package according to an embodiment may efficiently transmit the light waves  150 ,  151 , and  152  based on the above-mentioned principle. A detailed description thereof will be made with reference to  FIGS. 2A and 2B . 
       FIGS. 2A and 2B  are views illustrating an optical package according to an embodiment of the inventive concept. 
     Referring to  FIG. 2A , an optical package  210  according to an embodiment includes a substrate  220  including a light source  221  and a photodetector  222 , and a reflector  230  arranged on or over the substrate  220 . Here, the reflector  230  includes a first parabolic surface  231 , a second parabolic surface  232 , and a straight area  233 . 
     In the optical package  210 , the light source  221  may be arranged at a focus of the first parabolic surface  231  and the photodetector  222  may be arranged at a focus of the second parabolic surface  232 , based on the principle described above with reference to  FIG. 1 . Accordingly, the optical package  210  may be configured such that light waves  240  radiated from the light source  221  converge at the photodetector  222  after being reflected twice by the first parabolic surface  231  and the second parabolic surface  232 . 
     Then, due to restrictions such as the size and height of the light source  221  and the distinct characteristics of the radiated light waves, first reflective light waves  241  obtained after light waves  240  radiated by the light source  221  are reflected by the first parabolic surface  231  may travel while being inclined at a specific inclination, differently from the principle described above with reference to  FIG. 1 . Accordingly, a plurality of light waves radiated by the light source  221  may travel to the second parabolic surface  232  after crossing at any one point (a point of a location corresponding to a half of the length of the straight area  233 ) of a space of the straight area  233  of the reflector  230 . 
     However, because the second reflective light wave  242  reflected by the second parabolic curve  232  converge at the focus of the second parabolic surface  232  even though the first reflective light waves  241  travel while being inclined, the optical package  210  may be configured such that the photodetector  222  is arranged at the focus of the second parabolic surface  232 . 
     Further, in a process of arranging the light source  221  and the photodetector  222  of the optical package  210  in the substrate  220 , driving circuits that drive the light source  221  and the photodetector  222 , respectively, may be connected to the light source  221 , and the photodetector  222 . 
     In this way, the optical package  210  may be configured such that the light waves  240  radiated from the light source  221  may be transmitted to the photodetector  222  after being reflected by using the reflector  230  having the first parabolic surface  231  and the second parabolic surface  232 . Accordingly, the optical package  210  may reduce divergence or transfer loss of the light waves  240 ,  241 , and  242  in a process of transmitting the light waves  240 ,  241 , and  242  between the light source  221  and the photodetector  222  and may align the light waves  240 ,  241 , and  242 . 
     Further, the optical package  210  may have a structure including an optical grating coupler instead of the photodetector  222 . A detailed description thereof will be made with reference to  FIG. 2B . 
     Referring to  FIG. 2B , an optical package  250  according to an embodiment includes a substrate  260  including a light source  261  and an optical grating coupler  262 , and a reflector  270  arranged on or over the substrate  260 . Here, the reflector  270  includes a first parabolic surface  271 , a second parabolic surface  272 , and a straight area  273 . In the following description, the optical grating coupler  262  has a structure including an optical waveguide. 
     In the optical package  250 , the light source  261  may be arranged at a focus of the first parabolic surface  271  and the optical grating coupler  262  may be arranged at a focus of the second parabolic surface  272 , based on the principle described above with reference to  FIG. 1 . Accordingly, the optical package  250  may be configured such that light waves  280  radiated from the light source  261  converge at the optical grating coupler  262  after being reflected twice by the first parabolic surface  271  and the second parabolic surface  272 . 
     Then, a process of arranging the optical grating coupler  262  on or over the substrate  260  may include a photonic integrated circuit process based on a general semiconductor or polymer process. 
     Here, due to restrictions such as the size and height of the light source  261  and the distinct characteristics of the radiated light waves  280 , first reflective light waves  28  obtained after light waves  280  radiated by the light source  261  are reflected by the first parabolic surface  271  may travel while being inclined at a specific inclination, differently from the principle described above with reference to  FIG. 1 . Accordingly, a plurality of light waves radiated by the light source  261  may travel to the second parabolic surface  272  after crossing at any one point (a point of a location corresponding to a half of the length of the straight area  273 ) of a space of the straight area  273  of the reflector  270 . 
     However, because the second reflective light wave  282  reflected by the second parabolic curve  272  converge at the focus of the second parabolic surface  272  even though the first reflective light waves  281  travel while being inclined, the optical package  250  may be configured such that the optical grating coupler  262  is arranged at the focus of the second parabolic surface  272 . 
     Further, in a process of arranging the light source  261  of the optical package  250  in the substrate  260 , a driving circuit that drives the light source  261  may be connected to the light source  261 . 
     In this way, the optical package  250  may be configured such that the light waves  280  radiated from the light source  261  may be transmitted to the photodetector  262  after being reflected by using the reflector  270  having the first parabolic surface  271  and the second parabolic surface  272  and optical coupling may be performed by the optical grating coupler  262 . Accordingly, the optical package  250  may reduce divergence or transfer loss of the light waves  280 ,  281 , and  282  in a process of transmitting the light waves  280 ,  281 , and  282  between the light source  261  and the optical grating coupler  262 , may align the light waves  280 ,  281 , and  282 , and may increase optical coupling efficiency in the optical grating coupler  262 . 
       FIG. 3  is a view illustrating an optical package that is modified based on the optical package of  FIGS. 2A and 2B . 
     Referring to  FIG. 3 , an optical package  310  according to an embodiment includes a substrate  320  including a light source  321 , and a parabolic surface reflector  330  arranged on or over the substrate  320 . Here, unlike the reflector described above with reference to  FIGS. 2A and 2B , the parabolic surface reflector  330  may include any one  331  of an optical fiber or an optical waveguide in a form having only one parabolic surface. 
     The optical package  310  may be configured such that the light source  321  may be arranged at a focus of a parabolic surface of the parabolic surface reflector  330  based on the principle described above with reference to  FIG. 1 . Accordingly, the optical package  310  may be configured such that light waves  340  radiated from the light source  321  may converge at any one  331  of an optical fiber or an optical waveguide after being reflected once by the parabolic surface. 
     Then, due to restrictions such as the size and height of the light source  321  and the distinct characteristics of the radiated light waves, first reflective light waves  341  obtained after light waves  340  radiated by the light source  321  are reflected by the parabolic surface may travel while being inclined at a specific inclination, in the same principle as described above with reference to  FIGS. 2A and 2B . 
     Accordingly, in the optical package  310 , a location at which any one  331  of the optical fiber or the optical waveguide is arranged in the parabolic surface reflector  330  may be determined such that the reflective light waves  341  that travel while being inclined may converge at any one of the optical fiber or the optical waveguide. For example, in the optical package  310 , any one  331  of the optical fiber or the optical waveguide may be arranged at a specific location of the parabolic surface reflector  330  corresponding to any one point at which a plurality of light waves cross (any one point at which the reflective light waves  341  radiated by the light source  321  converge after being reflected by the parabolic surface), based on the characteristics in which the plurality of light waves radiated by the light source cross at any one point in a space in a straight area of the reflector (one point of a location corresponding to a half of the length of the straight area) as described above with reference to  FIGS. 2A and 2B . 
     Further, in a process of arranging the light source  321  of the optical package  310  in the substrate  320 , a driving circuit that drives the light source  321  may be connected to the light source  321 . 
     In this way, by using the parabolic surface reflector  330 , the optical package  310  may reflect the light waves  340  radiated from the light source  321  and transmit the reflected light waves  340  to any one  331  of the optical fiber or the optical waveguide. Accordingly, the optical package  310  may reduce divergence or transfer loss of the light waves  340  and  341  in a process of transmitting the light waves  340  and  341  between the light source  321  and any one of the optical fiber or the optical waveguide and may align the light waves  340  and  341 . 
       FIG. 4  is a view illustrating an optical package that is modified differently from the optical package of  FIG. 3 , based on the optical package of  FIGS. 2A and 2B . 
     Referring to  FIG. 4 , an optical package  410  according to an embodiment includes a substrate  420  including a photodetector  421 , and a parabolic surface reflector  430  arranged on or over the substrate  420 . Here, unlike the reflector described above with reference to  FIGS. 2A and 2B , the parabolic surface reflector  430  may include any one  431  of an optical fiber or an optical waveguide in a form having only one parabolic surface. 
     The optical package  410  may be configured such that the photodetector  421  may be arranged at a focus of a parabolic surface of the parabolic surface reflector  430  based on the principle described above with reference to  FIG. 1 . Accordingly, the optical package  410  may be configured such that light waves  440  that travels in any one  431  of an optical fiber or an optical waveguide may converge at the photodetector  421  after being reflected once by the parabolic surface. 
     Then, due to restrictions such as the size and height of any one  431  of the optical fiber or the optical waveguide and the distinct characteristics of the light waves  440 , the light waves  440  radiated into a space after traveling in any one  431  of the optical fiber or the optical waveguide may travel while being inclined at a specific inclination in the same principle as described with reference to  FIGS. 2A and 2B . 
     However, because the reflective light waves  441  reflected by the parabolic surface converge at the focus of the parabolic surface even when the light waves  440  travel while being inclined, the photodetector  421  of the optical package  410  may be arranged at the focus of the parabolic surface. 
     Further, the optical package  410  may be configured such that a location at which any one  431  of the optical fiber or the optical waveguide may be determined such that the light waves  340  that travel while being inclined may converge at the photodetector  421  after being reflected by the parabolic surface. 
     Further, in a process of arranging the photodetector  420  of the optical package  410  in the substrate  420 , a driving circuit that drives the photodetector  421  may be connected to the photodetector  221 . 
     Accordingly, the optical package  410  may be configured such that light waves  440  that travels in any one  431  of an optical fiber or an optical waveguide may be transmitted to the photodetector  421  after being reflected, by using the parabolic surface reflector  430 . Accordingly, the optical package  410  may reduce divergence or transfer loss of the light waves  440  and  441  in a process of transmitting the light waves  440  and  441  between any one  431  of the optical fiber or the optical waveguide and the photodetector  421  and may align the light waves  440  and  441 . 
       FIG. 5  is a concept view for explaining the principle of another optical package according to an embodiment. 
     Referring to  FIG. 5 , an optical package according to another embodiment includes a reflector  510  having an elliptical form. Here, the reflector  510  includes an elliptical surface. 
     Further, the term “an elliptic surface” used herein may mean that a reflective surface as at least one elliptic section. Further, the term “an elliptic surface” may mean that a two-dimensional reflective surface is an ellipsoidal surface. 
     Then, a first focus f  511  of the elliptical surface according to an ellipse equation of 
     
       
         
           
             
               
                 
                   
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     for a virtual coordinate system x and y is located at a distance that is spaced apart from the center of an ellipse by √{square root over (a 2 −b 2 )}. Here, a represents a long axis and b represents a short axis in the ellipse equation. Similarly, a second focus f  512  of the elliptical surface is located at a distance that is spaced apart from the center of the ellipse by √{square root over (a 2 −b 2 )}. 
     Accordingly, when the light waves  520  radiated from the light source arranged at the first focus  511  of the elliptical surface of the reflector  510  are reflected by the elliptical surface, the reflective light waves  521  converge at the second focus  512  of the elliptical surface. 
     Accordingly, the optical package according to another embodiment may efficiently transmit the light waves  520  and  521  based on the above-mentioned principle. A detailed description thereof will be made with reference to  FIG. 6 . 
       FIG. 6  is a view illustrating an optical package according to another embodiment. 
     Referring to  FIG. 6 , an optical package  610  according to another embodiment includes a substrate  620  including a light source  621  and a photodetector  622 , and a reflector  630  arranged on or over the substrate  620 . Here, the reflector  630  has an elliptical form having an elliptical surface. 
     The optical package  610  may be configured such that the light source  621  may be arranged at a focus of an elliptical surface and the photodetector  622  may be arranged at another focus of the elliptical surface based on the principle described above with reference to  FIG. 5 . Accordingly, the optical package  610  may be configured such that light waves  640  radiated from the light source  621  may converge at the photodetector  622  after being reflected once by the elliptical surface. 
     Then, due to restrictions such as the size and height of the light source  621  and the distinct characteristics of the radiated light waves, first reflective light waves  641  obtained after light waves  640  radiated by the light source  621  are reflected by the elliptical surface may travel towards a side that is located rather in front of another focus of the elliptical surface, differently from the principle as described above with reference to  FIG. 5 . 
     Accordingly, the optical package  610  may be configured such that the photodetector  622  may be arranged at a location at which the light waves  640  radiated from the light source  621  converge after being reflected by the elliptical surface (a location at which the reflective light waves  641  converge). 
     Further, in a process of arranging the light source  621  of the optical package  610  in the substrate  620 , a driving circuit that drives the light source  621  may be connected to the light source  621 . 
     In this way, the optical package  610  may be configured such that the light waves  640  radiated from the light source  621  may be transmitted to the photodetector  622  after being reflected by using the reflector  630  having the parabolic surface. Accordingly, the optical package  610  may reduce divergence or transfer loss of the light waves  640  and  641  in a process of transmitting the light waves  640  and  641  between the light source  621  and the photodetector  622  and may align the light waves  640  and  641 . 
     Further, the optical package  610  may have a structure including an optical grating coupler instead of the photodetector  622 . A detailed description thereof may be inferred from the description of  FIGS. 2A and 2B  and the description of  FIG. 6 , and thus will be omitted. 
       FIG. 7  is a concept view for explaining the principle of an optical package according to another embodiment. 
     Referring to  FIG. 7 , an optical package according to another embodiment includes a reflector  710  having a V-shaped form. Here, the reflector  710  includes a V-shaped surface. 
     Then, an incident angle at which the reflective light waves  721  that are obtained by reflecting the light waves  720  radiated form a light source arranged at an arbitrary location of the substrate is input to the substrate is determined by an angle θ formed by the V-shaped form of the reflector  710 , regardless of an angle at which the light waves  720  are radiated from the light source. For example, an incident angle at which the reflective light waves  721  are input to the substrate is determined to be 2θ−90. 
     Accordingly, the reflective light waves  721  converge at an arbitrary location on the substrate, based on a location of the light source that radiates the light waves  720  and an angle formed by the V-shaped form. 
     Accordingly, the optical package according to another embodiment may efficiently transmit the light waves  720  and  721  based on the above-mentioned principle. A detailed description thereof will be made with reference to  FIG. 8 . 
       FIG. 8  is a view illustrating an optical package according to another embodiment. 
     Referring to  FIG. 8 , an optical package  810  according to another embodiment includes a substrate  820  including a light source  821  and a photodetector  822 , and a reflector  830  arranged on or over the substrate  820 . Here, the reflector  830  has a V-shaped form having a V-shaped surface. 
     The optical package  810  may be configured such that the light source  821  may be arranged at an arbitrary location based on the principle described above with reference to  FIG. 7  and the photodetector  822  may be arranged on the substrate  820  based on a location at which the light source  821  is arranged and an angle formed by the V-shaped form. Accordingly, the optical package  810  may be configured such that the reflective light waves  841  reflected twice by the V-shaped surface may converge at the photodetector  822  through a fixed incident angle. 
     That is, the photodetector  822  may be arranged at a location at which the light waves  840  radiated from the light source  821  converge after being reflected twice by the V-shaped surface (a location at which the reflective light waves  841  reflected twice by the V-shaped surface converge). 
     Further, in a process of arranging the light source  821  of the optical package  810  in the substrate  820 , a driving circuit that drives the light source  821  may be connected to the light source  821 . 
     In this way, the optical package  810  may be configured such that the light waves  840  radiated from the light source  821  may be transmitted to the photodetector  822  after being reflected by using the reflector  830  having the V-shaped surface. Accordingly, the optical package  810  may reduce divergence or transfer loss of the light waves  840  and  841  in a process of transmitting the light waves  840  and  841  between the light source  821  and the photodetector  822  and may align the light waves  840  and  841 . Further, in the optical package  810 , an incident angle at which the light waves are input to the photodetector  822  is fixed regardless of radiation angles of the light waves  840 . 
     Further, the optical package  810  may have a structure including an optical grating coupler instead of the photodetector  822 . A detailed description thereof may be inferred from the description of  FIGS. 2A and 2B  and the description of  FIG. 8 , and thus will be omitted. 
       FIG. 9  is a view illustrating a method for manufacturing an optical package according to an embodiment. 
     Referring to  FIG. 9 , a method for manufacturing an optical package according to an embodiment is performed by a system for manufacturing an optical package. In the following description, a method for manufacturing an optical package according to an embodiment relates to a method for manufacturing the optical packages described above with reference to  FIGS. 2A and 2B, 6, and 8 . 
     Although not illustrated, the system for manufacturing an optical package may include a reflector that has any one of a form having two parabolic surfaces, an elliptical form or a V-shaped form. 
     The system for manufacturing an optical package includes any one of a photodetector or an optical grating coupler and a light source ( 910 ). 
     For example, when the reflector has a form having two parabolic surfaces, in operation  910 , the system for manufacturing an optical package may be configured such that a light source may be arranged at a focus of a first parabolic surface of the reflector and any one of a photodetector or an optical grating coupler may be arranged at a focus of a second parabolic surface of the reflector. Then, the description that any one of a photodetector or an optical grating coupler is arranged at a focus of the second parabolic surface of the reflector may mean that any one of a photodetector or an optical grating coupler may be arranged at a location at which light waves radiated from a light source converge after being reflected twice by the first parabolic surface and the second parabolic surface. 
     As another example, when the reflector has an elliptical form, in operation  910 , the system for manufacturing an optical package may be configured such that a light source is arranged at a focus of an elliptical surface of the reflector and any one of a photodetector or an optical grating coupler may be arranged at a location at which light waves radiated from a light source converge after being reflected by the elliptical surface. Here, the description that any one of a photodetector or an optical grating coupler is arranged at a location at which light waves radiated from a light source converge after being reflected by an elliptical surface may mean that any one of a photodetector or an optical grating coupler may be arranged at another focus of the elliptical surface. 
     As another example, when the reflector has a V-shaped form, in operation  910 , the system for manufacturing an optical package may be configured such that a light source is arranged at an arbitrary location on a substrate and any one of a photodetector or an optical grating coupler may be arranged on a substrate based on a location at which a light source is arranged on the substrate and an angle formed by the V-shaped form. Then, the description that any one of a photodetector or an optical grating coupler is arranged based on a location at which a light source is arranged on a substrate and an angle formed by a V-shaped form may mean that any one of a photodetector or an optical grating coupler may be arranged at a location at which light waves radiated from a light source converge after being reflected twice by the V-shaped surface. 
     Thereafter, in the system for manufacturing an optical package, a reflector that reflects light waves radiated from the light source and transmits the reflected light waves to any one of the photodetector or the optical grating coupler is arranged on or over the substrate ( 920 ). 
       FIG. 10  is a view illustrating a method for manufacturing an optical package according to another embodiment. 
     Referring to  FIG. 10 , the method for manufacturing an optical package according to the other embodiment is performed by a system for manufacturing an optical package, and relates to a method for manufacturing the optical packages described above with reference to  FIGS. 3 and 4 . 
     Although not illustrated, the system for manufacturing an optical package may have a parabolic surface reflector that has a form having one parabolic surface. 
     The system for manufacturing an optical package includes any one of a photodetector or a light source ( 1010 ). 
     In detail, in operation  1010 , in the system for manufacturing an optical package, any one of a photodetector or a light source may be arranged at a focus of a parabolic surface of the parabolic surface reflector. 
     Thereafter, in the system for manufacturing an optical package, a parabolic surface reflector including any one of an optical fiber or an optical waveguide is arranged on or over the system ( 1020 ). 
     Here, the parabolic surface reflector reflects light waves radiated from the light source to transmit the reflected light waves to any one of the optical fiber or the optical waveguide or reflects the light waves that travels in any one of the optical fiber or the optical waveguide to transmit the reflected light waves to the photodetector 
     Further, any one of the optical fiber or the optical waveguide of the parabolic surface reflector may be arranged at a location at which light waves radiated from the light source converge after being reflected by the parabolic surface or at a location at which light waves that travel in any one of the optical fiber or the optical waveguide converge at the photodetector after being reflected by the parabolic surface. 
     The inventive concept can provide an optical package including a simple reflector that decreases divergence of light waves and fixes an incident angle of light waves, and a method for manufacturing the same. 
     Accordingly, the inventive concept can provide an optical package that may be align light waves by providing a simple reflector that decreases divergence of the light waves and fixes an incident angle, may increase optical coupling efficiency, and may minimize light wave transfer loss, and a method for manufacturing the same. 
     Accordingly, the inventive concept can provide a technology for an optical package that lowers process complexity and costs and shorten process time. 
     In detail, the inventive concept can provide an optical package that includes a reflector having a V-shaped or curved form to decrease divergence of light waves and fix an incident angle of waves, and a method for manufacturing the same. 
     In particular, the inventive concept can provide an optical package that, when a reflector that has a form having a parabolic surface, efficiently transmits light waves by using a principle that, when light waves radiated from a light source arranged at a focus of a parabolic surface are reflected by the parabolic surface, the light waves always travel in parallel to each other, and a method for manufacturing the same. 
     In particular, the inventive concept can provide an optical package that, when a reflector that has a form having an elliptical surface, efficiently transmits light waves by using a principle that, when light waves radiated from a light source arranged at a focus of an elliptical are reflected by the elliptical surface, the light waves always travel toward another focus of the elliptical surface, and a method for manufacturing the same. 
     Further, the inventive concept can provide an optical package that, when a reflector having a V-shaped form is provided, efficiently transmits light waves by using a principle in which incident angles of light waves reflected twice by the V-shaped surface are determined according to an angle formed by the V-shaped form, and a method for manufacturing the same. 
     Although the embodiments of the inventive concept have been described with reference to the limited embodiments and the drawings, the inventive concept may be variously corrected and modified from the above description by those skilled in the art to which the inventive concept pertains. For example, the above-described technologies can achieve a suitable result even though they are performed in different sequences from those of the above-mentioned method and/or coupled or combined in different forms from the method in which the constituent elements such as the system, the architecture, the device, or the circuit are described, or replaced or substituted by other constituent elements or equivalents. 
     Therefore, the other implementations, other embodiments, and the equivalents of the claims pertain to the scope of the claims.