Coherent light generators – Particular beam control device – Tuning
Patent
1988-03-25
1990-09-04
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Tuning
372 92, 372 99, 372102, 350 9614, 350 9613, H01S 310
Patent
active
049550284
ABSTRACT:
Wavelength tunability and single frequency output are achieved in a coherent light source employing an adjustably controllable reflector. The light source includes a gain medium coupled to a single-mode fiber having a partially reduced cladding region at a predetermined distance from the gain medium. A Bragg reflector is either formed on the reduced cladding region of the single-mode fiber or formed on an external element in close proximity to the reduced cladding region. A single resonant optical cavity is formed by placing another reflector on the side of the gain medium opposite the gain medium-to-fiber coupling. Wavelength tuning of the light source is accomplished by controllably adjusting the period or the Bragg reflector element.
REFERENCES:
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Alferness Rodney C.
Eisenstein Gadi
Koren Uziel
Tien Ping K.
Tucker Rodney S.
AT&T Bell Laboratories
Jr. Leon Scott
Ranieri Gregory C.
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