EP0192164A2
Expired / Lapsed
EP
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Optical coupling device
Assignee: Japan Broadcasting Corp
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Filing: 1986-02-11
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Granted: —
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Expires: 2006-02-11
Abstract
Abstract An output light beam from a semiconductor laser is converged by a lens system or a fine optical fiber with a small core diameter. The converged light beam is incident upon a part of the light receiving end face of a tapered optical fiber which is greater in area than the other end face thereof which is connected to one end of an optical fiber. The reflected light beam in the multi-mode optical fiber because of discontinuous portion is substantially prevented from returning to the semiconductor laser, so that the adverse effects on the semiconductor laser by the reflected beam can be minimized.
Inventors
- 👤 Kimiyuki Oyamada
- 👤 Yozo Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 05:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/262; G02B6/28; G02B6/2804; G02B6/2817; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; G02B6/4204; G02B6/4206; G02B6/4249; G02B6/425
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
An optical coupling device of the type for coupling an output beam from a semiconductor laser to an optical fiber having a first optical member for converging the output beam from said semiconductor laser and a second optical member having a light receiving end face which receives the converged light beam from said first optical member and a coupling end face coupled to said optical fiber, characterized in that, a part of said light receiving end face receives said converged light beam and an area of said light receiving end face is larger than that of said coupling end face.
Claim 2
Dependent Claim
100 words
An optical coupling device of the type for coupling an output beam from a semiconductor laser to an optical fiber having a first optical member for converging the output beam from said semiconductor laser and a second optical member having a light receiving end face which receives the converged light beam from said first optical member and a coupling end face coupled to said optical fiber, characterized in that, a part of said light receiving end face receives said converged light beam and an area of said light receiving end face is larger than that of said coupling end face.
Claim 3
Dependent Claim
32 words
An optical coupling device as claimed in claim 1, characterized in that said coupling end face has a core area equal to or less than the core area of said optical fiber.
Claim 4
Dependent Claim
27 words
An optical coupling device as claimed in claim 1 or 2, characterized in that said second optical member is in the form of a tapered optical fiber.
Claim 5
Dependent Claim
26 words
An optical coupling device as claimed in any one of claims 1-3, characterized in that said second optical member is formed integral with said optical fiber.
Claim 6
Dependent Claim
26 words
An optical coupling device as claimed in any one of claims 1-4, characterized in that said first optical member is formed by a converging lens system.
Claim 7
Dependent Claim
29 words
An optical coupling device as claimed in any one of claims 1-4, characterized in that said first optical member is a fine optical fiber having a small core diameter.
Claim 8
Dependent Claim
147 words
An optical coupling device of the type for coupling an output beam from a plurality of semiconductor lasers to an optical fiber having a first optical member for converging the output beam from said semiconductor laser and a second optical member having a light receiving end face which receives the converged light beam from said first optical member and a coupling end face coupled to said optical fiber, characterized in that, said optical coupling device has a plurality of first optical members for converging the respective output beams from said semiconductor lasers, and a part of said second optical member receives the converged light beams from said first optical members at different locations of said light receiving end face and a coupling end face coupled to said optical fiber, and an area of said light receiving end face is larger than that of said coupling end face.
Claim 9
Dependent Claim
147 words
An optical coupling device of the type for coupling an output beam from a plurality of semiconductor lasers to an optical fiber having a first optical member for converging the output beam from said semiconductor laser and a second optical member having a light receiving end face which receives the converged light beam from said first optical member and a coupling end face coupled to said optical fiber, characterized in that, said optical coupling device has a plurality of first optical members for converging the respective output beams from said semiconductor lasers, and a part of said second optical member receives the converged light beams from said first optical members at different locations of said light receiving end face and a coupling end face coupled to said optical fiber, and an area of said light receiving end face is larger than that of said coupling end face.
Claim 10
Dependent Claim
32 words
An optical coupling device as claimed in claim 7, characterized in that said coupling end face has a core area equal to or less than the core area of said optical fiber.
Claim 11
Dependent Claim
27 words
An optical coupling device as claimed in claim 7 or 8, characterized in that said second optical member is in the form of a tapered optical fiber.
Claim 12
Dependent Claim
26 words
An optical coupling device as claimed in any one of claims 7-9, characterized in that said second optical member is formed integral with said optical fiber.
Claim 13
Dependent Claim
28 words
An optical coupling device as claimed in any one of claims 7-10, characterized in that each of said first optical members is formed by a converging lens system.
Claim 14
Dependent Claim
33 words
12 . An optical coupling device as claimed in any one of claims 7-10, characterized in that each of said first optical members is a fine optical fiber having a small core diameter.
References Cited (Backward Citations)
No citation records indexed.
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