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公开(公告)号：WO9627223A3
公开(公告)日：1996-10-10
申请号：PCT/US9602626
申请日：1996-02-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： D AMATO MARY A , BALL GARY A , MELTZ GERALD
CPC classification number: H01S3/0675 , H01S3/06712
Abstract: A polarized fiber laser source includes a fiber laser (10) comprising a pair of Bragg gratings (14, 16) at opposite ends of a fiber laser cavity (18) which is doped with a rare-earth dopant so as to allow lasing to occur at a lasing wavelength μL. A grating tap (26) is provided along a portion of the laser cavity (18) to couple-out a predetermined amount of light along one polarization, e.g., the 's' polarization, at the lasing wavelength μL. This causes one polarization mode to experience more loss than the other, thereby allowing the fiber laser to lase only on the less lossy polarization mode and causing the laser output light (40) to be polarized only along such polarization.
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公开(公告)号：ES2125664T3
公开(公告)日：1999-03-01
申请号：ES95934505
申请日：1995-09-21
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A , MOREY WILLIAM W
IPC: H01S3/06 , H01S3/067 , H01S3/1055 , H01S3/17 , H01S3/10
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公开(公告)号：CA2177733A1
公开(公告)日：1995-06-15
申请号：CA2177733
申请日：1994-12-06
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A
Abstract: A coupled multiple output fiber laser includes a plurality of laser diodes 10,50-56 each providing pump light 12,58-64 which is incident on respective Bragg gratings 16,74-80 which pass the pump wavelength and reflect a lasing wavelength. The fibers 20,90-96 are doped with a gain dopant such as Er3+ to provide lasing at the lasing wavelength in response to the pump light. Light beams 18,82-88 are incident on an optical coupler 22 which couples the light beams 18,82-88 to the light beams 40-48 on the fibers 30-38 based on a predetermined power distribution, e.g., equal distribution. The light 40 travels along the fiber 30 which acts as a common-cavity fiber. The light 40 reflects off a reflector 120 which provides reflected feedback light 122 which reenters the coupler 22 and is distributed to the individual cavity fibers 20,82-88 based on the same or a different predetermined power distribution. Output light 42-48 is provided on the fibers 32-38 which may be incident on a lens 160 to cause the beams to intersect. The length of each of the fibers 20,90-96 is adjusted by piezoelectric tuners 200-208 to provide coupled cavity phase-locking of the output beams 42-48. Also, each of the output beams 42-48 may be phase shifted by additional tuners 240-246. An additional output beam may be obtained by a light 232 which passes through the mirror 120.
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公开(公告)号：CA2177733C
公开(公告)日：2000-05-02
申请号：CA2177733
申请日：1994-12-06
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A
Abstract: A coupled multiple output fiber laser includes a plurality of laser diodes (10, 50-56) each providing pump light (12, 58-64) which is incident on respective Bragg gratings (16, 74-80) which pass the pump wavelength and reflect a lasing wavelength. The fibers (20, 90-96) are doped with a gain dopant such as Er3+ to provide lasing at the lasing wavelength in response to the pump light. Light beams (18, 82-88) are incident on an optical coupler (22) which couples the light beams (18, 82-88) to the light beams (40-48) on the fibers (30-38) based on a predetermined power distribution e.g., equal distribution. The light (40) travels along the fiber (30) which acts as a common-cavity fiber. The light (40) reflects off a reflector (120) which provides reflected feedback light (122) which reenters the coupler (22) and is distributed to the individual cavity fibers (20, 82-88) based on the same or a different predetermined power distribution. Output light (42-48) is provided on the fibers (32-38) which may be incident on a lens (160) to cause the beams to intersect. The length of each of the fibers (20, 90-96) is adjusted by piezoelectric tuners (200-208) to provide coupled cavity phase-locking of the output beams (42-48). Also, each of the output beams (42-48) may be phase shifted by additional tuners (240-246). An additional output beam may be obtained by a light (232) which passes through the mirror (120).
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公开(公告)号：DK0681681T3
公开(公告)日：1998-10-12
申请号：DK94907899
申请日：1994-01-26
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A , MELTZ GERALD , NEWMAN LEON A
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Patent Agency Ranking
公开(公告)号：CA2188259A1
公开(公告)日：1996-09-06
申请号：CA2188259
申请日：1996-02-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A , MELTZ GERALD
Abstract: A single polarization fiber and/or amplifier includes a non-polarization preserving fiber (10) having a fiber grating tap (12) which has a predetermined length and strength (.DELTA.n/n) and is oriented at a predetermined angle .theta. and has a grating spacing D so as to couple-out of the fiber (10) a predetermined amount of one polarization (24) over a predetermined wavelength range of an input light (16) and pass the other polarization (28) as output light (26), the grating length being substantially the length of the fiber (10). Alternatively, all or a portion of the fiber (10) may be doped to form a polarization sensitive optical amplifier.
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公开(公告)号：CA2188259C
公开(公告)日：2008-06-10
申请号：CA2188259
申请日：1996-02-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A , MELTZ GERALD
Abstract: A single polarization fiber and/or amplifier includes a non-polarization pre serving fiber (10) having a fiber grating tap (12) which has a predetermined length and strength (.DELTA.n/n) and is oriented at a predet ermined angle .theta. and has a grating spacing D so as to couple-out of the fiber (10) a predetermined amount of one polarization (24) over a predet ermined wavelength range of an input light (16) and pass the other polarization (28) as output light (26), the grating length being subst antially the length of the fiber (10). Alternatively, a ll or a portion of the fiber (10) may be doped to form a polarization sensitive optical ampl ifier.
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公开(公告)号：CA2212444C
公开(公告)日：2005-05-24
申请号：CA2212444
申请日：1996-02-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MELTZ GERALD , BALL GARY A , D AMATO FRANCIS X
Abstract: A polarized fiber laser source includes a fiber laser (10) comprising a pair of Bragg gratings (14, 16) at opposite ends of a fiber laser cavity (18) which is doped with a rare-earth dopant so as to allow lasing to occur at a lasing wavelength .lambda.L. A grating tap (26) is provided along a portion of the laser cavity (18) to couple-out a predetermined amoun t of light along one polarization, e.g., the "s" polarization, at the lasing wavelength .lambda.L. This causes one polarization mode to experience more loss than the other, thereby allowing the fiber laser to las e only on the less lossy polarization mode and causing the laser output light (40) to be polarized only along such polarization.
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公开(公告)号：ES2176340T3
公开(公告)日：2002-12-01
申请号：ES95933937
申请日：1995-09-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A
Abstract: An efficient wavelength multiplexer/demultiplexer includes a plurality of 2x2 optical couplers 122,180,200,220, each having a pair of matched gratings 130,142; 182,184; 202,204; and 222,224, having bandpass wavelengths lambda 1, lambda 2, lambda 3, lambda 4, respectively, attached to two of the ports. An input signal 116 enters a port 120 and is split and reflected off the gratings 130,142 and then recombined so as to provide all the input signal 116 at an output port 150 and no reflection out of the port 120. Another input signal 154 is incident on the grating 142 which is passed by the grating 142 and is coupled onto the output port 150 with the signal 116 as a signal 160. A similar arrangement exists for the other couplers 180,200,220 connected in series, each of which adds another input wavelength. Alternatively, in a de-multiplexing application the signal 116 may be broadband and the signals 154,190,206,230 would be separate output wavelengths.
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公开(公告)号：CA2200569A1
公开(公告)日：1996-04-11
申请号：CA2200569
申请日：1995-09-21
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BALL GARY A , MOREY WILLIAM W
IPC: H01S3/06 , H01S3/067 , H01S3/1055 , H01S3/17
Abstract: A fiber laser (26) including a rare-earth doped fiber laser cavity (32) delimited by a pair of reflective elements (28, 30), such as Bragg gratings, is tuned by compressing the cavity (32) and the gratings (28, 30). Because an optical fiber is much stronger under compression than in tension, the laser (26) is tunable over a much broader range than conventional tension/stretching techniques.
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