Source: https://patents.google.com/patent/JP3795469B2/en
Timestamp: 2020-02-19 19:06:19
Document Index: 800390581

Matched Legal Cases: ['arts 5', 'art 2', 'art 5', 'art 5', 'art) 4', 'art) 4', 'art 4', 'art 5', 'art 3', 'art 4', 'art 4', 'art 5', 'art 5', 'art 5', 'art 5', 'art 19']

JP3795469B2 - Optical connector - Google Patents
JP3795469B2
JP3795469B2 JP2003075168A JP2003075168A JP3795469B2 JP 3795469 B2 JP3795469 B2 JP 3795469B2 JP 2003075168 A JP2003075168 A JP 2003075168A JP 2003075168 A JP2003075168 A JP 2003075168A JP 3795469 B2 JP3795469 B2 JP 3795469B2
JP2003075168A
JP2004280025A (en
2003-03-19 Application filed by 日本航空電子工業株式会社 filed Critical 日本航空電子工業株式会社
2003-03-19 Priority to JP2003075168A priority Critical patent/JP3795469B2/en
2004-10-07 Publication of JP2004280025A publication Critical patent/JP2004280025A/en
2006-07-12 Publication of JP3795469B2 publication Critical patent/JP3795469B2/en
The present invention relates to an optical connector in which each optical fiber of at least one optical connector bends when a first optical connector and a second optical connector are connected.
First, a conventional first optical connector will be described (for example, see Patent Document 1).
As shown in FIG. 9A, before the fusion connection between the optical fiber 32 inserted into the ferrule 31 and the optical fiber core wire 34, the covering of each connection end is removed, The bare optical fiber end 32a and the bare optical fiber end 34a of the optical fiber core wire 34 are exposed.
The bare optical fiber end 32a of the optical fiber 32 and the bare optical fiber end 34a of the optical fiber core 34 are placed on a fusion splicer (not shown), and aligned and clamped on the V-groove of the fusion splicer. After that, as shown in FIG. 9B, fusion splicing is performed by discharge heating.
Since the mechanical strength of the bare optical fiber end 32a and the bare optical fiber end 34a from which the coating has been removed is reduced, as shown in FIG. 9C, the optical fiber 32 and the optical fiber core 34 are separated from each other. It is reinforced by passing the reinforcing body 33 between them.
Next, a conventional second optical connector will be described (for example, see Patent Document 2).
This optical connector is used for connecting a single mode fiber, and aims to improve the accuracy of the position and eccentricity of the optical fiber in the ferrule. FIG. 10A shows a cross-sectional view, and FIG. 10B shows an exploded view.
One end of the optical fiber 42 is fixed to the attachment hole 41 a formed in the ferrule 41. The optical fiber 42 includes a first optical fiber portion 43 having a high dimensional accuracy and a small core eccentricity, and a second optical fiber portion 44 having a dimensional accuracy lower than that of the first optical fiber portion 43 and a large core eccentricity. The The core 43a of the first optical fiber portion 43 is surrounded by the clad 43b, and the core 44a of the second optical fiber portion 44 is surrounded by the clad 44b. The first optical fiber portion 43 is disposed in the ferrule 41 and is optically coupled by fusing the first optical fiber portion 43 and the second optical fiber portion 44 together. Since both the first optical fiber portion 43 and the attachment hole 41a are formed with high accuracy, the gap between them is small. For this reason, the optical fiber 42 is fixed to the ferrule 41 by introducing the adhesive 45 into a gap portion formed between the second optical fiber portion 44 and the attachment hole 41a.
JP 2002-82257 A (3rd page, 4th column, 41st line-4th page, 5th column, 1st line, FIG. 2)
JP-A-5-119235 (page 3, column 3, line 31-page 4, column 5, line 31, FIG. 1)
In each of the first and second optical connectors, two optical fibers are fusion-connected and accommodated in a reinforcement or a ferrule, but the two optical fibers are of the same type. Further, when each optical connector is connected to the counterpart optical connector, no bending occurs in each optical fiber of each optical connector.
In the present invention, the end face of each optical fiber of the first optical connector abuts the end face of each optical fiber of the second optical connector at the time of connection, and each optical fiber or second of the first optical connector In an optical connector in which bending occurs in at least one of the optical fibers of the optical connector, an amount of the expensive optical fiber having a high damage prevention capability is to be reduced.
In the optical connector that connects the first optical connector that holds the first optical fiber and the second optical connector that holds the second optical fiber, the first optical connector and the second optical connector are: Each having a main body, a clamp portion for holding the first optical fiber or the second optical fiber, and a cover for fixing the clamp portion to the main body, the first optical connector and the second optical fiber upon connection of the optical connector, the first and the end face of the end surface and the second optical fiber of the optical fiber abuts, and, bending at least one of the first optical fiber or the second optical fiber There occurs, an optical fiber in which the bending occurs is constructed by connecting the end faces transgressions fused end face and the long fiber portion of the short optical fiber portion, the short optical fiber portion which protrudes from the clamping portion Deflection, The short optical fiber part has a polymer layer, has a higher damage prevention capability than the long optical fiber part, and the clamp part is provided with an opening, and the opening is filled with an adhesive. A fusion splicing portion between the short optical fiber portion and the long optical fiber portion disposed in the opening, a peeling portion of the polymer layer in the vicinity thereof, and a fiber coating removing portion of the long optical fiber portion. Protected optical connector.
An optical connector according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view before the optical connector is fitted, and a part of the components is removed so that the inside can be seen. One optical connector plug 1 and the other optical connector plug 11 are connected by an optical connector adapter 21. The optical connector adapter 21 is provided with a large number of V grooves 22, and the optical fibers of the optical connector plug 1 and the optical fibers of the optical connector plug 11 are aligned in each V groove 22.
FIG. 2 is a longitudinal sectional view before the optical connector is fitted.
FIG. 3 is a perspective view after the optical connector is fitted. In the optical connector plug 1, the optical fiber on the right side of the line drawn in the width direction is a normal optical fiber, and the left optical fiber is a special optical fiber having a polymer layer (details will be described later). is there. Special optical fibers have higher damage prevention capability than ordinary optical fibers. The same applies to the optical connector plug 11. The special optical fiber of the optical connector plug 1 and the special optical fiber of the optical connector plug 11 are aligned on each V groove 22 of the optical connector adapter 21.
FIG. 4 is a longitudinal sectional view after the optical connector is fitted.
FIG. 5 is an exploded perspective view of the optical connector plug 1. The optical connector plug 1 is attached to a substantially rectangular frame-shaped main body 2, a cover 3 that covers the main body 2, four clamp portions 5 that respectively clamp a plurality of optical fibers 4, and a tip of the main body 2. And a fiber protector 6 that protects the tip of each optical fiber 4. The four clamp parts 5 are inserted into the receiving part 2a of the main body 2 in parallel so as to be adjacent to each other.
The cover 3 protects each optical fiber 4, and the structure is different between the case where the optical fiber 4 is used on the side to bend and the case where the optical fiber 4 is not used on the side which is not bent. In this case, an elastic member 19 (provided as a separate body such as rubber or integrated with the cover) is provided on the lower surface of the cover, and the elastic member 19 serves to hold each optical fiber 4 so as not to bend.
The detail of the clamp part 5 is demonstrated with reference to the expanded sectional view of the clamp part 5 shown by FIG.
In the optical fiber 4, a special optical fiber side (short optical fiber part) 4a having a polymer layer and a normal optical fiber side (long optical fiber part) 4b are fused and connected by a fusion splicing part 4c. It is composed by doing. The short optical fiber portion 4a includes a polymer layer covering portion 4a1 and a polymer layer peeling portion 4a2. The length L1 of the polymer layer peeling portion 4a2 is 3 mm. The long optical fiber portion 4b includes a tape fiber coating portion 4b1 and a tape fiber coating removal portion 4b2. The length L2 of the tape fiber coating removal portion 4b2 is 6 mm. The clamp portion 5 is formed with an opening 5a and a narrow hole 5c through which the short optical fiber portion 4a is inserted on the upper surface side. The opening 5a is filled with an adhesive, and the range of L3 is within the adhesive filling portion 5b. It becomes.
In general, in an ordinary optical fiber, the strength of the portion where the coating is removed deteriorates. However, in the present invention, the polymer layer peeling portion 4a2, the fusion splicing portion 4c, and the tape fiber coating removal portion 4b2 are protected by the adhesive in the clamp portion 5, so that the optical fiber 4 as a whole has mechanical characteristics. And is hardly affected by environmental changes such as temperature and humidity.
FIG. 7 shows details of the fusion splicing portion 4c between the short optical fiber portion 4a and the long optical fiber portion 4b. Due to the discharge at the time of fusion, the polymer layer at the tip of the short optical fiber portion 4a is peeled, and the outer diameter of the polymer layer peeling portion 4a2 is reduced (for example, 0.115 mm). However, the connection loss due to fusion is not inferior to the connection between ordinary optical fibers.
FIG. 8A shows connection loss due to fusion between a special optical fiber having a polymer layer and a normal optical fiber, and FIG. 8B shows connection loss due to fusion between normal optical fibers. It has been found that any connection loss has no problem in practice.
An assembling method of the optical connector plug 1 will be described with reference to FIG. After the short optical fiber portion 4 a and the long optical fiber portion 4 b on the cable side are fused and connected, the optical fiber 4 is fixed to the clamp portion 5. After a predetermined number of optical fibers 4 are fixed to the clamp portions 5, the clamp portions 5 with the optical fibers 4 are fixed to the receiving portions 2 a of the main body 2. Since each clamp part 5 and the main body 2 are comprised separately, an assembly is easy. The optical connector plug 11 is the same as the optical connector plug 1.
When the optical connector plug 1 and the optical connector plug 11 are fitted via the optical connector adapter 21 as shown in FIGS. 3 and 4, the tip of each short optical fiber portion 4a of the optical connector plug 1 and the light The tip of each short optical fiber portion 14 a of the connector plug 11 is abutted on each V groove 22 of the optical connector adapter 21. Therefore, although the short optical fiber portions 4a and 14a protruding from the clamp portions 5 and 15 are bent, since they are special optical fibers having a polymer layer, they have a high damage prevention capability, so there is no fear of breakage. .
As is apparent from the above description, the following effects are achieved according to the present invention.
1. It is possible to provide an optical connector that uses an optical fiber having an expensive polymer layer having a high damage prevention capability and uses a small amount of optical fiber.
2. The fusion splicing between the short optical fiber portion and the long optical fiber portion is easily performed by discharge heating or the like.
3. The fusion splicing part of the optical fiber, the polymer layer peeling part of the short optical fiber part in the vicinity thereof, and the fiber coating removing part of the long optical fiber part are protected by an adhesive in the opening of the clamp part. Therefore, the optical fiber as a whole has no hindrance in mechanical characteristics, and is hardly affected by environmental changes such as temperature and humidity.
FIG. 1 is a perspective view of an optical connector according to an embodiment of the present invention before fitting.
FIG. 3 is a perspective view after the optical connector is fitted.
FIG. 5 is an exploded perspective view of an optical connector plug in the optical connector.
FIG. 6 is a longitudinal sectional view of a clamp portion in the optical connector plug.
FIG. 7 shows a fusion spliced portion between a special optical fiber side (short optical fiber portion) having a polymer layer in the optical connector plug and a normal optical fiber side (long optical fiber portion) and an enlarged front view in the vicinity thereof. FIG.
FIG. 8 is a graph of fusion splicing loss data of an optical fiber, where (A) is a fusion result of a special optical fiber having a polymer layer and a normal optical fiber in the optical connector plug, and (B) is a normal one. The results of fusion between optical fibers are shown.
FIGS. 9A to 9C show an outline of a fusion splicing process between an optical fiber and an optical fiber core wire in a conventional first optical connector, sequentially (A) to (C).
10A and 10B are cross-sectional views of a ferrule, a first optical fiber portion, and a second optical fiber portion in a conventional second optical connector, wherein FIG. 10A is a state where the optical fiber is attached to the ferrule, and FIG. Indicates the disassembled state.
DESCRIPTION OF SYMBOLS 1 Optical connector plug 2 Main body 2a Receiving part 3 Cover 4 Optical fiber 4a The special optical fiber side (short optical fiber part) which has a polymer layer
4a1 Polymer layer covering portion 4a2 Polymer layer peeling portion 4b Normal optical fiber side (long optical fiber portion)
4b1 Tape fiber coating part 4b2 Tape fiber coating removal part 4c Fusion splicing part 5 Clamp part 5a Opening part 5b Adhesive filling part 5c Narrow hole 6 Fiber protector 11 Optical connector plug 14a Short optical fiber light 15 Clamp part 19 Elastic member 21 Light Connector adapter 22 V groove
In the optical connector in which the first optical connector holding the first optical fiber and the second optical connector holding the second optical fiber are connected,
Each of the first optical connector and the second optical connector includes a main body, a clamp portion that holds the first optical fiber or the second optical fiber, and a cover that fixes the clamp portion to the main body. Have
When connecting the first optical connector and the second optical connector, the end surface of the first optical fiber is in contact with the end surface of the second optical fiber, and the first optical fiber or Deflection occurs in at least one of the second optical fibers,
The optical fiber in which the bending occurs is configured by fusion-bonding the end surface of the short optical fiber portion and the end surface of the long optical fiber portion,
The short optical fiber portion protruding from the clamp portion is bent,
The short optical fiber part has a polymer layer and has a higher ability to prevent damage than the long optical fiber part,
The clamp portion is provided with an opening, and the opening is filled with an adhesive, whereby the spliced connection portion between the short optical fiber portion and the long optical fiber portion disposed in the opening. An optical connector characterized in that a peeling portion of the polymer layer in the vicinity thereof and a fiber coating removal portion of the long optical fiber portion are protected.
JP2003075168A 2003-03-19 2003-03-19 Optical connector Expired - Fee Related JP3795469B2 (en)
JP2003075168A JP3795469B2 (en) 2003-03-19 2003-03-19 Optical connector
US10/801,009 US7207726B2 (en) 2003-03-19 2004-03-16 Optical connector using an optical fiber having a special fiber portion as a part thereof
DE200460000444 DE602004000444T2 (en) 2003-03-19 2004-03-17 Optical connector with a coated piece of fiber as a coupling member
EP20040006405 EP1460464B1 (en) 2003-03-19 2004-03-17 Optical connector using a coated optical fiber stub as a coupling portion
TW93107201A TWI254154B (en) 2003-03-19 2004-03-18 Optical connector using an optical fiber having a special fiber portion as a part thereof
KR20040018301A KR100649843B1 (en) 2003-03-19 2004-03-18 Optical connector using an optical fiber having a special fiber portion as a part thereof
CNB200410028785XA CN1279376C (en) 2003-03-19 2004-03-18 Optical connector using optical fiber having special optical fiber part as one part therein
JP2004280025A JP2004280025A (en) 2004-10-07
JP3795469B2 true JP3795469B2 (en) 2006-07-12
ID=32821343
JP2003075168A Expired - Fee Related JP3795469B2 (en) 2003-03-19 2003-03-19 Optical connector
US (1) US7207726B2 (en)
EP (1) EP1460464B1 (en)
JP (1) JP3795469B2 (en)
KR (1) KR100649843B1 (en)
CN (1) CN1279376C (en)
DE (1) DE602004000444T2 (en)
TW (1) TWI254154B (en)
DE964279C (en) 1955-07-15 1957-05-23 Autol Werke G M B H Additives for motor fuels
JPH05119235A (en) 1991-10-25 1993-05-18 Fujitsu Ltd Optical connector
JP2985044B2 (en) * 1994-10-20 1999-11-29 日本航空電子工業株式会社 Light multi-core connector
JPH10123366A (en) 1996-10-25 1998-05-15 Nippon Telegr & Teleph Corp <Ntt> Optical connector
DE19826275A1 (en) * 1998-06-12 1999-12-16 Delphi Automotive Systems Gmbh Optical connection unit
JP3451217B2 (en) 1999-04-19 2003-09-29 日本電信電話株式会社 Optical connector and optical adapter used therefor
2003-03-19 JP JP2003075168A patent/JP3795469B2/en not_active Expired - Fee Related
2004-03-16 US US10/801,009 patent/US7207726B2/en not_active Expired - Fee Related
2004-03-17 EP EP20040006405 patent/EP1460464B1/en not_active Expired - Fee Related
2004-03-17 DE DE200460000444 patent/DE602004000444T2/en active Active
2004-03-18 TW TW93107201A patent/TWI254154B/en not_active IP Right Cessation
2004-03-18 CN CNB200410028785XA patent/CN1279376C/en not_active IP Right Cessation
2004-03-18 KR KR20040018301A patent/KR100649843B1/en not_active IP Right Cessation
KR20040082961A (en) 2004-09-30
TW200424582A (en) 2004-11-16
US20040184740A1 (en) 2004-09-23
US7207726B2 (en) 2007-04-24
TWI254154B (en) 2006-05-01
EP1460464B1 (en) 2006-03-08
CN1550804A (en) 2004-12-01
CN1279376C (en) 2006-10-11
DE602004000444D1 (en) 2006-05-04
JP2004280025A (en) 2004-10-07
DE602004000444T2 (en) 2006-08-24
KR100649843B1 (en) 2006-11-24
EP1460464A1 (en) 2004-09-22
EP2083300A1 (en) 2009-07-29 Optical connector
2018-04-21 LAPS Cancellation because of no payment of annual fees