Coherent light generators – Particular component circuitry – Optical pumping
Patent
1987-12-04
1989-03-28
Sikes, William L.
Coherent light generators
Particular component circuitry
Optical pumping
350 9610, 372 25, 372703, G02B 632, H01S 310
Patent
active
048158062
ABSTRACT:
A system for launching laser light into an optical fiber, which includes means for suppressing establishment of an interfering standing wave in the laser cavity, either by preventing laser light from reflecting back into the cavity from the fiber, or by preventing light which does reflect into the cavity from the fiber from establishing an interfering standing wave. In a preferred embodiment, the system includes a rod-type lens having a front surface for receiving incident laser light and a back surface, and an optical fiber having an end surface substantially parallel to and coupled with the back surface of the lens, where the angle between the propagation direction of the incident laser light and the normal to the fiber's end surface is sufficiently large so that reflected light from the lens-fiber interface will propagate away from the laser cavity and will not re-enter the laser cavity. Alternative embodiments include means for varying the optical path length between the laser and the fiber, or means for varying the frequency of light propagating between the laser and the fiber, in order to reduce the likelihood that light reflected back into the laser from the fiber will establish an interfering standing wave.
REFERENCES:
patent: 3995230 (1976-11-01), See
patent: 4281891 (1981-08-01), Shinohara et al.
patent: 4575194 (1986-03-01), Streifer et al.
patent: 4627068 (1986-12-01), Johnson et al.
patent: 4635263 (1987-01-01), Mollenauer
patent: 4676586 (1987-06-01), Jones et al.
patent: 4723824 (1988-02-01), Shaw et al.
Coherent Inc.
Sikes William L.
Ullah Akm E.
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