G - Physics – 02 – B
Patent
G - Physics
02
B
88/97.5
G02B 6/26 (2006.01) G02B 6/28 (2006.01) G02B 6/34 (2006.01) G02B 27/10 (2006.01) H01S 3/094 (2006.01) H01S 3/0933 (2006.01)
Patent
CA 1242605
FIBER OPTIC AMPLIFIER Abstract of the Disclosure An optical fiber bidirectional amplifier includes a pair of small diameter optical fibers, arranged in a side- by-side configuration, the first fiber providing a pumping source and the second fiber doped with a material which will lase at the frequency of the signal to be amplified. The signal to be amplified propagates through the second fiber to stimulate emission of coherent light from the lasing material, resulting in amplification of the signal. The refractive indexes of the first and second fibers are substantially identical, but the coupling characteristic provided by the geometrical relationship between the pair of fibers yields a wavelength dependent coupling efficiency. Specifically, the coupling efficiency at the wavelength of the pumping source is relatively high, while the coupling efficiency at the wavelength of the signal to be amplified is relatively low. Thus, the pumping illumination is coupled from the first fiber to the second fiber to stimulate the doping material in the second fiber, while the signal to be amplified remains relatively uncoupled, and is amplified by the coherent light emitted by the lasing material.
434314
Chodorow Marvin
Digonnet Michel J.f.
Shaw Herbert J.
Board Of Trustees Of The Leland Stanford Junior University
Gowling Lafleur Henderson Llp
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