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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 incontinuous 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 amore » high power output pulse. The process may be repeated to provide a series of high power pulses of a consistent single frequency.« less

Inventors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (USA)
OSTI Identifier:
5936936
Patent Number(s):
PATENTS-US-A7428540
Application Number:
ON: DE91011678; PPN: US 7-428540
Assignee:
Dept. of Energy LLNL; EDB-91-076135
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent Application
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; RING LASERS; DESIGN; INVENTIONS; NEODYMIUM; NOVA FACILITY; OPTICAL PUMPING; Q-SWITCHING; ELEMENTS; LASERS; METALS; PUMPING; RARE EARTHS; 426002* - Engineering- Lasers & Masers- (1990-)

Citation Formats

Hackel, L.A. Ring laser having an output at a single frequency. United States: N. p., 1989. Web.
Hackel, L.A. Ring laser having an output at a single frequency. United States.
Hackel, L.A. Mon . "Ring laser having an output at a single frequency". United States.
@article{osti_5936936,
title = {Ring laser having an output at a single frequency},
author = {Hackel, L.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 incontinuous 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 = {1989},
month = {10}
}