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Title: Unidirectional ring lasers

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.

Inventors:
 [1];  [1]
  1. (Albuquerque, NM)
Publication Date:
Research Org.:
AT & T CORP
OSTI Identifier:
869513
Patent Number(s):
US 5349601
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
unidirectional; lasers; formed; integrating; nonreciprocal; optical; elements; resonant; cavity; attenuate; light; traveling; nonpreferred; direction; amplify; preferred; embodiment; takes; form; circle; s-shaped; crossover; waveguide; connected; interior; diverted; reinjected; light traveling; optical element; optical elements; preferred embodiment; resonant cavity; preferred direction; reciprocal optical; /372/385/

Citation Formats

Hohimer, John P., and Craft, David C. Unidirectional ring lasers. United States: N. p., 1994. Web.
Hohimer, John P., & Craft, David C. Unidirectional ring lasers. United States.
Hohimer, John P., and Craft, David C. Sat . "Unidirectional ring lasers". United States. doi:. https://www.osti.gov/servlets/purl/869513.
@article{osti_869513,
title = {Unidirectional ring lasers},
author = {Hohimer, John P. and Craft, David C.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}

Patent:

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  • Unidirectional ring lasers formed by integrating nonreciprocal optical elements into the resonant ring cavity is disclosed. 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 preferredmore » direction. 21 figs.« less
  • A ring configuration dye laser is disclosed that is capable of supporting laser oscillations in the form of backward and forward running waves and including unidirectional polarization shifter for causing preferential oscillation of one of said waves in unidirectional, single frequency operation.
  • This patent describes a bilithic laser resonator. It comprises a first block; a second block, separated by a gap width of W{sub g} from the first block; at least one of the first and second block being of a material capable of lasing: at least one of the first and second blocks being of a material capable of producing Faraday rotation of an optical beam travelling therein; means for varying the width of W{sub g} of the gap; means for defining, within a region consisting of the first and second blocks and the gap between these two blocks, a resonantmore » unidirectional ring that includes at least four non-coplanar reflection vertices; input means for injecting an input beam of light into the ring to pump laser; and output means for extracting an output laser beam from light in the unidirectional ring.« less
  • A laser resonator is described comprising: a solid-state laser medium; means for defining within the solid-state laser medium a resonant unidirectional ring including at least four non-coplanar reflection vertices, the maximum minor angle defined by intersections of pairs of planes defined by respective sets of three of the reflection vertices being less than 45/sup 0/.
  • Detailed results for the project of Kerr lens mode-locked lasers using ring resonators are presented, and the working conditions for unidirectional operation are outlined. Both the small and large signal regimes are explored, discussing important issues such as the modelocking threshold and saturation of the amplitude modulation mechanism, both for femtosecond and picosecond systems. Useful simple relations for laser design are derived.