Fiber-optic ring laser

Details Fiber-optic ring laser Fiber-optic ring laser

1992-11-03

1996-04-02

Lee, John D.

Coherent light generators

Particular resonant cavity

Folded cavity

356350, 372 6, 372 20, H01S 3083

Patent

active

055047718

ABSTRACT:
A single-frequency fiber-optic ring laser exhibits improved frequency stability, reduced laser intensity noise, broad tunability and narrow linewidth. The fiber-optic ring laser includes a ring-resonator with a length of single-mode optical fiber, a gain medium of rare earth-doped fiber, a broad-band fiber Fabry-Perot filter for wavelength tuning of the laser, a narrow-band fiber Fabry-Perot filter for suppression of longitudinal ring modes and an optical isolator for preventing interetalon interactions between the tandem fiber Fabry-Perot filters. Selective positioning of the tandem fiber Fabry-Perot filters, relative to the ring laser's gain medium and output coupler, results in laser intensity noise reduction to the standard quantum limit.

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