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Title: Non-intrusive beam power monitor for high power pulsed or continuous wave lasers

Abstract

A system and method for monitoring the output of a laser is provided in which the output of a photodiode disposed in the cavity of the laser is used to provide a correlated indication of the laser power. The photodiode is disposed out of the laser beam to view the extraneous light generated in the laser cavity whose intensity has been found to be a direct correlation of the laser beam output power level. Further, the system provides means for monitoring the phase of the laser output beam relative to a modulated control signal through the photodiode monitor.

Inventors:
 [1];  [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
868651
Patent Number(s):
5184189
Assignee:
United States of Americas as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
non-intrusive; beam; power; monitor; pulsed; continuous; wave; lasers; method; monitoring; output; laser; provided; photodiode; disposed; cavity; provide; correlated; indication; view; extraneous; light; generated; intensity; found; direct; correlation; level; provides; means; phase; relative; modulated; control; signal; beam output; power pulsed; power pulse; beam relative; laser output; continuous wave; laser cavity; power level; control signal; output beam; laser beam; output power; beam power; light generated; laser power; wave laser; modulated control; direct correlation; provides means; /356/250/372/

Citation Formats

Hawsey, Robert A, and Scudiere, Matthew B. Non-intrusive beam power monitor for high power pulsed or continuous wave lasers. United States: N. p., 1993. Web.
Hawsey, Robert A, & Scudiere, Matthew B. Non-intrusive beam power monitor for high power pulsed or continuous wave lasers. United States.
Hawsey, Robert A, and Scudiere, Matthew B. Fri . "Non-intrusive beam power monitor for high power pulsed or continuous wave lasers". United States. https://www.osti.gov/servlets/purl/868651.
@article{osti_868651,
title = {Non-intrusive beam power monitor for high power pulsed or continuous wave lasers},
author = {Hawsey, Robert A and Scudiere, Matthew B},
abstractNote = {A system and method for monitoring the output of a laser is provided in which the output of a photodiode disposed in the cavity of the laser is used to provide a correlated indication of the laser power. The photodiode is disposed out of the laser beam to view the extraneous light generated in the laser cavity whose intensity has been found to be a direct correlation of the laser beam output power level. Further, the system provides means for monitoring the phase of the laser output beam relative to a modulated control signal through the photodiode monitor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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