Unidirectional ring lasers

Details Unidirectional ring lasers Unidirectional ring lasers

1993-09-20

1994-09-20

Epps, Georgia Y.

Coherent light generators

Particular resonant cavity

Folded cavity

372 6, 385 39, H01S 3083

Patent

active

053496019

ABSTRACT:
Unidirectional ring lasers formed by integrating nonreciprocal optical elements into the resonant ring cavity. These optical elements either attenuate light traveling in a nonpreferred direction or amplify light traveling in a preferred direction. In one preferred embodiment the resonant cavity takes the form of a circle with an S-shaped crossover waveguide connected to two points on the interior of the cavity such that light traveling in a nonpreferred direction is diverted from the cavity into the crossover waveguide and reinjected out of the other end of the crossover waveguide into the cavity as light traveling in the preferred direction.

REFERENCES:
patent: 4924476 (1990-05-01), Behfar-Rad et al.
patent: 5031190 (1991-07-01), Behfar-Rad
patent: 5177764 (1993-01-01), Nilsson
Y. H. Ja, "A Spectacles-Shaped Optical Fibre Ring Resonator with Two Couplers," Optical and Quantum Electronics 23 (1991) pp. 379-389.
Y. H. Ja, "Simultaneous Resonance of an S-Shaped Two-Coupler Optical Fibre Ring Resonator," Optics Communications 102 (1993) pp. 133-140.
Y. H. Ja, "An Unsymmetric S-Shaped Double-Coupler Optical Fibre Loop," Optics Communications, vol. 78, No. 1, (Aug,. 1990), pp. 81-89.
Y. H. Ja, "A Symmetric S-Shaped Double-Coupler Optical-Fibre Loop," Journal of Modern Optics, (1990), vol. 37, No. 8, pp. 1297-1317.

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