Source: http://www.google.com/patents/US6973234?dq=Xerox+%2B+%22centroid
Timestamp: 2014-03-17 13:06:08
Document Index: 672321589

Matched Legal Cases: ['Application No. 2002', 'art 1', 'art 1', 'art 1', 'art 2', 'art 2', 'art 3']

Patent US6973234 - Optical circuit for condensing laser beams, and light source device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsEach of guided beam incident portions of an optical waveguide device includes a straight incidence area where laser beams enter, a curved area which curves the laser beams entering from the straight incidence area in a predetermined direction, and a widening tapered area which makes the laser beams that...http://www.google.com/patents/US6973234?utm_source=gb-gplus-sharePatent US6973234 - Optical circuit for condensing laser beams, and light source deviceAdvanced Patent SearchPublication numberUS6973234 B2Publication typeGrantApplication numberUS 10/445,915Publication dateDec 6, 2005Filing dateMay 28, 2003Priority dateMay 29, 2002Fee statusLapsedAlso published asDE60300998D1, DE60300998T2, EP1367679A2, EP1367679A3, EP1367679B1, US20030223685Publication number10445915, 445915, US 6973234 B2, US 6973234B2, US-B2-6973234, US6973234 B2, US6973234B2InventorsKazuo Hasegawa, Tadashi Ichikawa, Hiroyuki Matsubara, Mitsutoshi Maeda, Hiroshi ItoOriginal AssigneeKabushiki Kaisha Toyota Chuo KenkyushoExport CitationBiBTeX, EndNote, RefManPatent Citations (12), Referenced by (3), Classifications (22), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetOptical circuit for condensing laser beams, and light source deviceUS 6973234 B2Abstract Each of guided beam incident portions of an optical waveguide device includes a straight incidence area where laser beams enter, a curved area which curves the laser beams entering from the straight incidence area in a predetermined direction, and a widening tapered area which makes the laser beams that have passed through the curved area parallel or substantially parallel to a propagation direction of the laser beams by decreasing propagation angles of the laser beams.
CROSS-REFERENCE TO RELATED APPLICATION This application claims priority under 35USC 119 from Japanese Patent Application No. 2002-155318, the disclosure of which is incorporated by reference herein.
Japanese Patent Application Laid-Open (JP-A) No. 5-93828 proposes a �device for condensing laser diodes of a multiple emitter to a multi-mode optical fiber� (hereinafter referred to as �related art 1�). The related art 1 attempts to condense laser beams at high density by making emission surfaces 12, 14 and 16 of a laser diode bar 10 respectively correspond to optical fibers 18, 20 and 22 of an optical fiber bundle 24 as shown in FIG. 1 of the related art 1.
JP-A No. 7-168040 proposes a device for condensing semiconductor lasers (hereinafter referred to as �related art 2�). The related art 2 includes, as shown in FIG. 2 thereof, semiconductor lasers (a laser bar) 1b having a plurality of stacked light sources, an optical branching device 2b 1 for condensing laser beams, which have been respectively emitted from the semiconductor laser 1b, in a transverse direction, and an optical branching device 2b 2 for condensing laser beams, which have exited from the optical branching device 2b 1, in a longitudinal direction.
JP-A No. 2000-19362 proposes a condensing device for arrayed semiconductor lasers (hereinafter referred to as �related art 3�). The condensing device includes a condenser 10 for condensing laser beams emitted from light-emitting portions of arrayed semiconductor lasers.
SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems. An object of the present invention is to provide an optical circuit for condensing laser beams and a light source device which multiplexes at high efficiency a plurality of laser beams emitted from arrayed light sources.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the structure of a light source device for a semiconductor laser according to an embodiment of the present invention.
The semiconductor laser arrays 20 are disposed on the Si substrate 10 at predetermined intervals along the direction in which the laser sources of the semiconductor laser arrays 20 are arranged. Each of the semiconductor arrays 20 is driven by electricity supplied from a power supply 21 and emits laser beams from a plurality of laser beam emitting portions in the same direction. Divergence angles of the laser beams are θ⊥ to 40� in the direction of the fast axis and θ// to 10� in a direction of a slow axis, which are common characteristics.
Other Embodiments of Optical Waveguide Device 40 The present invention is not limited to the above embodiment, and various design modifications are possible within the scope of the invention. In the following description, components which are similar to those of the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
OTHER EMBODIMENTS In the above embodiments, the optical waveguide device 40 has the step-index structure and includes SiO2 as the cladding material and SiO2 with GeO2 added thereto as the core material. However, the optical waveguide device 40 may include other optical materials and have a graded-index structure in view of the distribution of refractive indices.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5127068Nov 16, 1990Jun 30, 1992Spectra-Physics, Inc.Apparatus for coupling a multiple emitter laser diode to a multimode optical fiberUS5410625Dec 2, 1991Apr 25, 1995The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern IrelandOptical device for beam splitting and recombiningUS5729643May 12, 1997Mar 17, 1998Coherent, Inc.Tapered composite optical fiber and method of making the sameUS5852692May 16, 1997Dec 22, 1998Coherent, Inc.Tapered optical fiber delivery system for laser diodeUS5949931 *Aug 4, 1997Sep 7, 1999Nec CorporationOptical couplerUS20020126479 *Mar 7, 2002Sep 12, 2002Ball Semiconductor, Inc.High power incoherent light source with laser arrayEP0424913A2Oct 24, 1990May 2, 1991Mitsubishi Gas Chemical Company, Inc.Optical divider for multi mode optical fiber systemsEP0893719A1Jul 14, 1998Jan 27, 1999Lucent Technologies Inc.Apparatus for pumping an optical fiber laserJP2000019362A Title not availableJP2000352637A Title not availableJPH0593828A Title not availableJPH07168040A Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7321710 *Feb 6, 2004Jan 22, 2008William Andrew ClarksonApparatus for providing optical radiationUS7805037 *Aug 19, 2003Sep 28, 2010Kotura, Inc.Multiplexer having improved efficiencyUS20130011097 *Nov 10, 2010Jan 10, 2013Taerok JungLight guide device having multi channels* Cited by examinerClassifications U.S. Classification385/31, 385/39, 385/43International ClassificationG02B6/125, H01S5/40, H01S3/23, G02B6/42, G02B6/122, G02B6/28, H01S3/00Cooperative ClassificationH01S3/2383, H01S5/4012, G02B6/1228, G02B6/2808, G02B6/125, H01S5/4025, G02B6/4249, H01S3/005European ClassificationG02B6/42C8, H01S3/00F, G02B6/125, G02B6/122TLegal EventsDateCodeEventDescriptionJan 28, 2014FPExpired due to failure to pay maintenance feeEffective date: 20131206Dec 6, 2013LAPSLapse for failure to pay maintenance feesJul 19, 2013REMIMaintenance fee reminder mailedMay 6, 2009FPAYFee paymentYear of fee payment: 4Dec 23, 2003ASAssignmentOwner name: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HASEGAWA, KAZUO;ICHIKAWA, TADASHI;MATSUBARA, HIROYUKI;AND OTHERS;REEL/FRAME:014829/0957Effective date: 20030523RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google