Accession Number : ADD018352

Title :   Laser Optics Protective Device.

Descriptive Note : Patent, Filed 30 Nov 94, patented 22 Oct 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Justus, Brian L ; Huston, Alan L ; Campillo, Anthony J ; Merritt, Charles D

Report Date : Oct 1996

Pagination or Media Count : 10

Abstract : A broadband thermal optical limiter disposed between a laser oscillator and a laser amplifier system for protecting optical components in the laser oscillator from damage due to amplified optical feedback from the laser amplifier system at all near ultraviolet, visible and near infrared wavelengths is disclosed. The thermal optical limiter comprises: a first lens for focusing the amplified optical feedback to a focal point on an optical axis; a flowing dye cell disposed near the focal point and being responsive to the focused amplified optical feedback for thermally defocusing and aberrating the focused amplified optical feedback into a plurality of rings about the optical axis; a second lens for passing only a small portion of the defocused amplified optical feedback; and a blocking aperture disposed around the second lens for blocking substantially all of the thermally defocused amplified optical feedback from the flowing dye cell and passing therethrough into the second lens only a small portion of the thermally defocused amplified optical feedback from the flowing dye cell.

Descriptors :   *LASER BEAMS, *LASER SAFETY, *LASER DAMAGE, *PATENTS, MAGNETOOPTICS, BACKSCATTERING, LIGHT TRANSMISSION, VISIBLE SPECTRA, FOCUSING, DYE LASERS, LASER HAZARDS, BEAM STEERING, NEAR INFRARED RADIATION, LIMITERS, OPTICAL LENSES, LASER AMPLIFIERS, NEAR ULTRAVIOLET RADIATION, LASER COMPONENTS, BACKWARD WAVE OSCILLATORS, POLARIZERS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE