Westinghouse Electric Corporation

Chi-Sheng Liu

Donald W Feldman

Koon W Loh

A pulse laser system utilized for communication transmits a modulated pulsed laser beam having a precise wavelength to match a receiver. An etalon is positioned in the resonant cavity of the laser and is adjustable to tune the laser. A continuous wave reference beam is provided and is compared with the laser output beam and if the wavelength's bear other than a predetermined relationship with respect to one another, a control signal is generated to adjust the etalon in the laser resonant cavity. In one embodiment another etalon is placed in the reference beam path as well as the laser beam path with the transmitted beams being detected in order to derive normalized proportionality factors relating to each beam so that a comparison of the proportionality factors may be made and utilized for control purposes.

Wavelength stabilization for a pulsed tunable laser

A laser communication system in which a filter-detector is provided which has a high acceptance angle and a narrow bandwidth. The filter-detector contains vaporized selected atomic species or a molecular composition dissociable to the selected atomic species. The selected atomic species electronic ground state is not absorptive of the laser output wavelength, but the selected atomic species exhibits a metastable or long-lived energy state which when populated absorbs the laser output wavelength. A subsequent transition produces fluorescence from the atomic species as a function of the laser output.

Laser communication system

Disclosed is a method of maintaining the power of the output of a xenon chloride laser. The gases in the lasing chamber are circulated between the lasing chamber and a reforming chamber. In the reforming chamber, the gases are contacted with at least one metal chloride which is chemically less stable than hydrogen chloride. The temperature of the metal chloride in the reforming chamber is maintained between the condensation temperature of hydrogen chloride and the dissociation temperature of the metal chloride used. Also disclosed is apparatus for performing this method.

Growing community of inventors

Monroeville Boro, PA, United States of America

Chi-Sheng Liu