A non-intrusive beam power monitor for high power pulsed or continuous wave lasers

Patent Application · Wed May 29 00:00:00 EDT 1991

OSTI ID:6852232

Hawsey, R A; Scudiere, M B

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.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7706831
• Application Number: ON: DE93011995; PPN: US 7-706831
• OSTI ID: 6852232
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAM MONITORS
DESIGN
LASER RADIATION
BEAM MONITORING
LASERS
INVENTIONS
PHOTODIODES
ELECTROMAGNETIC RADIATION
MEASURING INSTRUMENTS
MONITORING
MONITORS
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
426002* - Engineering- Lasers & Masers- (1990-)
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments