Article comprising an optical waveguide laser

Details Article comprising an optical waveguide laser Article comprising an optical waveguide laser

1992-10-23

1995-07-18

Bovernick, Rodney B.

Coherent light generators

Particular beam control device

Optical output stabilization

372 6, 372 38, H01S 313

Patent

active

054348765

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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