Accession Number : ADD013528

Title :   Waveplate for Correcting Thermally Induced Stress Birefringence in Solid State Lasers.

Descriptive Note : Patent, Filed 13 Mar 81, patented 4 Oct 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lundstrom, Eric A

Report Date : 04 Oct 1983

Pagination or Media Count : 7

Abstract : This patent discusses thermally induced stress birefringence in laser resonators is eliminated by inserting a waveplate in the resonating cavity. The waveplate is chosen by matching its polarization transmission matrices of the laser rod and a Porro prism used as an end reflector in the resonating cavity. This produces a total polarization transmission matrix in the resonating cavity which is independent of ray coordinates. Additional control of the polarization transmission matrix is provided using a Porro prism as a cavity reflector that has an antireflection coating on its roof to change the required phase advance angle of the waveplate.

Descriptors :   *ANTIREFLECTION COATINGS, *LASERS, *REFLECTORS, *RESONATORS, *PATENTS, BIREFRINGENCE, CAVITIES, COORDINATES, RODS, ROOFS, SOLID STATE LASERS, THERMAL STRESSES

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE