Coherent light generators – Optical fiber laser
Patent
1993-12-09
1995-03-07
Epps, Georgia Y.
Coherent light generators
Optical fiber laser
372 18, 385 15, 385 24, 385 28, 385 39, H01S 330
Patent
active
053965060
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 Er.sup.3+ 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.
REFERENCES:
patent: 4896324 (1990-01-01), Ball et al.
patent: 5113244 (1992-05-01), Curran
patent: 5134620 (1992-07-01), Huber
patent: 5136420 (1992-08-01), Inagaki et al.
patent: 5138675 (1992-08-01), Schofield
patent: 5165104 (1992-11-01), Weverka
patent: 5179603 (1993-01-01), Hall et al.
DePardo Gerald L.
Epps Georgia Y.
United Technologies Corporation
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