Accession Number : AD0475689

Title :   GIANT PULSE LASER OPERATION WITH SEMICONDUCTOR MIRRORS.

Descriptive Note : Technical documentary rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Birnbaum ,Milton ; Stocker,Tom L.

Report Date : DEC 1965

Pagination or Media Count : 28

Abstract : Giant optical pulses have been produced in the operation of lasers in which one reflector is a polished optically flat semiconductor and the other is a partially reflecting multiple film dielectric mirror. Giant pulse operation is initiated when the laser light is sufficiently intense to produce an increase in semiconductor reflectivity by inducing a high carrier concentration. Results of giant pulse operation with ruby lasers using germanium, silicon, boron, GaAs, GaSb, InAs, and InSb and Nd3+ glass lasers using germanium, InAs and InSb are presented. These results are contrasted with operation of lasers using dielectric mirrors of comparable reflectivity. In all cases, the semiconductors were severely damaged after one or a few giant pulses. Much reduced semiconductor damage was observed when InAs and particularly InSb were used at oblique incidence. Giant pulse operation was observed with semiconductor mirrors (germanium, InAs and InSb) cooled to 100 K. The comparative performance of the semiconductor giant pulse lasers can be understood on the basis of a model in which the dominant loss mechanism is due to the recombination of electron-hole pairs. (Author)

Descriptors :   (*LASERS, AIR FORCE RESEARCH), MIRRORS, SEMICONDUCTORS, LIGHT PULSES, RUBY, GERMANIUM, INDIUM ALLOYS, ARSENIC ALLOYS, ANTIMONY ALLOYS, NEODYMIUM, THEORY, SEMICONDUCTOR DIODES, SILICON, PHOTOELECTRIC CELLS(SEMICONDUCTOR), TEST METHODS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE