Coherent light generators – Optical fiber laser
Patent
1994-02-07
1995-10-03
Bovernick, Rodney B.
Coherent light generators
Optical fiber laser
372 19, 372703, H01S 330
Patent
active
054558352
ABSTRACT:
We have discovered that at least some optical waveguide lasers such as Er-doped fiber lasers are subject to excessive output amplitude fluctuations, including severe fluctuations when the laser is subjected to mechanical shock. We have determined that these highly undesirable fluctuations are due to a resonance phenomenon, and that the fluctuations can be at least substantially reduced by means of a feedback loop that makes the amplitude of the output of the pump laser responsive to the amplitude of the output of the waveguide laser. We have also discovered that the operation of a pump laser/waveguide laser combination is frequently improved if an appropriate non-reciprocal element (e.g., an isolator or a tilted wavelength filter) is placed between the two lasers. An exemplary embodiment of the invention comprises the feedback loop as well as the non-reciprocal element.
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Atkins Robert M.
Delavaux Jean-Marc P.
Mizrahi Victor
AT&T Corp.
Bovernick Rodney B.
Pacher Eugen E.
Wise Robert E.
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