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Title: Ring laser having an output at a single frequency

Abstract

A ring laser is disclosed that produces a single frequency of laser radiation in either the pulsed mode of operation or the continuous waveform (cw) mode of operation. The laser comprises a ring laser in a bowtie configuration, a birefringent gain material such as Nd:YLF, an improved optical diode that supports laser oscillation having a desired direction of travel and linear polarization, and a Q-switch. An output coupler (mirror) having a high reflectivity, such as 94%, is disclosed. Also disclosed is a self-seeded method of operation in which the laser can provide a pulse or a series of pulses of high power laser radiation at a consistent single frequency with a high degree of amplitude stability and temporal stability. In operation, the laser is operated in continuous waveform (cw) at a low power output with the Q-switch introducing a loss into the resonating cavity. Pumping is continued at a high level, causing the gain material to store energy. When a pulse is desired, the Q-switch is actuated to substantially reduce the losses so that a pulse can build up based on the low level cw oscillation. The pulse quickly builds, using the stored energy in the gain medium to providemore » a high power output pulse. The process may be repeated to provide a series of high power pulses of a consistent single frequency.« less

Inventors:
 [1]
  1. (Livermore, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
867856
Patent Number(s):
US 5022033
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
laser; output; single; frequency; disclosed; produces; radiation; pulsed; mode; operation; continuous; waveform; cw; comprises; bowtie; configuration; birefringent; material; ylf; improved; optical; diode; supports; oscillation; desired; direction; travel; linear; polarization; q-switch; coupler; mirror; reflectivity; 94; self-seeded; method; provide; pulse; series; pulses; power; consistent; degree; amplitude; stability; temporal; operated; introducing; loss; resonating; cavity; pumping; continued; level; causing; store; energy; actuated; substantially; reduce; losses; build; based; quickly; builds; stored; medium; process; repeated; pulsed mode; output coupler; power pulse; continuous wave; power output; output pulse; laser radiation; power laser; stored energy; substantially reduce; single frequency; store energy; laser comprises; desired direction; improved optical; power pulses; laser oscillation; /372/

Citation Formats

Hackell, Lloyd A. Ring laser having an output at a single frequency. United States: N. p., 1991. Web.
Hackell, Lloyd A. Ring laser having an output at a single frequency. United States.
Hackell, Lloyd A. Tue . "Ring laser having an output at a single frequency". United States. https://www.osti.gov/servlets/purl/867856.
@article{osti_867856,
title = {Ring laser having an output at a single frequency},
author = {Hackell, Lloyd A.},
abstractNote = {A ring laser is disclosed that produces a single frequency of laser radiation in either the pulsed mode of operation or the continuous waveform (cw) mode of operation. The laser comprises a ring laser in a bowtie configuration, a birefringent gain material such as Nd:YLF, an improved optical diode that supports laser oscillation having a desired direction of travel and linear polarization, and a Q-switch. An output coupler (mirror) having a high reflectivity, such as 94%, is disclosed. Also disclosed is a self-seeded method of operation in which the laser can provide a pulse or a series of pulses of high power laser radiation at a consistent single frequency with a high degree of amplitude stability and temporal stability. In operation, the laser is operated in continuous waveform (cw) at a low power output with the Q-switch introducing a loss into the resonating cavity. Pumping is continued at a high level, causing the gain material to store energy. When a pulse is desired, the Q-switch is actuated to substantially reduce the losses so that a pulse can build up based on the low level cw oscillation. The pulse quickly builds, using the stored energy in the gain medium to provide a high power output pulse. The process may be repeated to provide a series of high power pulses of a consistent single frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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