US4911516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device with mode selecting grating
Assignee: General Electric Co
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Filing: 1989-02-27
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Granted: 1990-03-27
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Expires: 2009-02-27
Abstract
Abstract An optical fiber has a beveled end surface and a Bragg reflector grating formed on the end surface to form a single mode reflector for a semiconductor laser. A transmission fiber with a beveled end is fused to the beveled grating to form a continuous transmission line having an internal reflective grating.
Inventors
- 👤 Stephen L. Palfrey
- 👤 Michael Ettenberg
- 👤 Victor Korsun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02057; G02B6/02061; G02B6/02066; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4215; G02B6/4219; G02B6/4236; G02B6/4244; H; H01; H01S; H01S5/00; H01S5/10; H01S5/14; H01S5/146; H01S5/141
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
141 words
An optical fiber construction with a mode selecting grating comprising: a single mode light transmitting fiber core member having a first index of refraction and first and second ends, said core member having an optical axis along which light is propagated; a light transmitting fiber cladding surrounding said core member and having a second index of refraction different than the first index of refraction to form a first light transmitting fiber with said core member; said core member and cladding tapering toward one of said ends and inclined relative to said optical axis to form a surface inclined at a given angle relative to said optical axis, said inclined surface including a reflective grating formed therein for reflecting incident light from said core member back to said core member, said reflected light having a given wavelength extent determined by said grating.
Claim 2
Dependent Claim
141 words
An optical fiber construction with a mode selecting grating comprising: a single mode light transmitting fiber core member having a first index of refraction and first and second ends, said core member having an optical axis along which light is propagated; a light transmitting fiber cladding surrounding said core member and having a second index of refraction different than the first index of refraction to form a first light transmitting fiber with said core member; said core member and cladding tapering toward one of said ends and inclined relative to said optical axis to form a surface inclined at a given angle relative to said optical axis, said inclined surface including a reflective grating formed therein for reflecting incident light from said core member back to said core member, said reflected light having a given wavelength extent determined by said grating.
Claim 3
Dependent Claim
26 words
The optical fiber of claim 1 wherein said grating has a certain period projected onto said axis, said projected period corresponding to said given wavelength extent.
Claim 4
Dependent Claim
19 words
The optical fiber of claim 1 wherein said given angle is in the range of about 1° to 5°.
Claim 5
Dependent Claim
54 words
The optical fiber of claim 1 further including a second fiber having a tapered end which tapers relative to its optical axis at said given angle and means for abutting the tapered ends of said first and second fibers to form a substantially continuous fiber containing said inclined reflective grating internal said continuous fiber.
Claim 6
Dependent Claim
52 words
The optical fiber of claim 1 further including a semiconductor laser device having a beam emitting region and means for coupling the other of said ends of said core member to the beam emitting region wherein said grating forms an optical cavity with said device for light of said given wavelength extent.
Claim 7
Dependent Claim
75 words
An optical fiber device comprising: a semiconductor laser having a light emitting end face; a single mode optical fiber coupled to said end face for receiving the light emitted by said laser along a fiber optical axis; and a Bragg reflector grating formed in the fiber and inclined relative to said optical axis for forming a laser cavity, said reflector grating including means for reflecting light of a given wavelength extent determined by said grating.
Claim 8
Dependent Claim
75 words
An optical fiber device comprising: a semiconductor laser having a light emitting end face; a single mode optical fiber coupled to said end face for receiving the light emitted by said laser along a fiber optical axis; and a Bragg reflector grating formed in the fiber and inclined relative to said optical axis for forming a laser cavity, said reflector grating including means for reflecting light of a given wavelength extent determined by said grating.
Claim 9
Dependent Claim
26 words
The device of claim 6 wherein said grating is inclined at an angle in the range of about 1° to 5° relative to said optical axis.
Claim 10
Dependent Claim
18 words
The device of claim 6 wherein said reflector grating is disposed between first and second abutting optical fibers.
Claim 11
Dependent Claim
87 words
A direct coupled external Bragg reflector optical fiber device comprising: a semiconductor laser having a light emitting region at a surface thereof; and a single mode optical fiber optically coupled to said surface at said region for receiving laser emitted light along a fiber optical axis, said fiber including a wavelength reflecting grating inclined in the range of about 1° to 5° to said axis and having a grating period such as to reflect light of substantially a given wavelength in a direction along said optical axis.
Claim 12
Dependent Claim
87 words
A direct coupled external Bragg reflector optical fiber device comprising: a semiconductor laser having a light emitting region at a surface thereof; and a single mode optical fiber optically coupled to said surface at said region for receiving laser emitted light along a fiber optical axis, said fiber including a wavelength reflecting grating inclined in the range of about 1° to 5° to said axis and having a grating period such as to reflect light of substantially a given wavelength in a direction along said optical axis.
Claim 13
Dependent Claim
39 words
The device of claim 9 further including an additional optical fiber with an inclined end face abutting and secured to said grating to form a substantially continuous fiber containing an inclined grating within the body of said continuous fiber.
Claim 14
Dependent Claim
14 words
The device of claim 10 wherein said additional fiber is fused to said grating.
Claim 15
Dependent Claim
76 words
An optical light transmissive device with a wavelength selecting grating comprising: a single mode optical light transmissive member having an optical axis extending in a given direction along which axis light is substantially propagated; and a wavelength selecting light reflecting grating formed in the member on a surface thereof inclined relative to and intersecting said optical axis to reflect light propagating within the member, said reflected light having a given wavelength extent determined by said grating.
Claim 16
Dependent Claim
76 words
An optical light transmissive device with a wavelength selecting grating comprising: a single mode optical light transmissive member having an optical axis extending in a given direction along which axis light is substantially propagated; and a wavelength selecting light reflecting grating formed in the member on a surface thereof inclined relative to and intersecting said optical axis to reflect light propagating within the member, said reflected light having a given wavelength extent determined by said grating.
Claim 17
Dependent Claim
30 words
The device of claim 12 wherein said member inclined surface has a given area, said reflecting grating being transverse said optical axis on a portion of said given inclined area.
Claim 18
Dependent Claim
26 words
The device of claim 12 wherein the projected period of said grating in a direction parallel to said axis is one half said given wavelength extent.
Claim 19
Dependent Claim
53 words
A Bragg reflector optical fiber comprising: a single mode optical fiber for propagating light along an optical axis; and a Bragg reflector for reflecting a portion of said propagating light, said portion being of a given wavelength extent, said Bragg reflector being formed in said fiber inclined relative to and intersecting said axis.
Claim 20
Dependent Claim
53 words
A Bragg reflector optical fiber comprising: a single mode optical fiber for propagating light along an optical axis; and a Bragg reflector for reflecting a portion of said propagating light, said portion being of a given wavelength extent, said Bragg reflector being formed in said fiber inclined relative to and intersecting said axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |