Accession Number : ADA323290

Title :   Femtosecond Laser System for Research on High-Speed Optical Transmultiplexing and Coding.

Descriptive Note : Final rept. 1 Sep 95-31 Aug 96,

Corporate Author : PURDUE UNIV LAFAYETTE IN

Personal Author(s) : Weiner, Andrew M.

PDF Url : ADA323290

Report Date : 31 AUG 1996

Pagination or Media Count : 5

Abstract : We have been investigating optical thresholders capable of distinguishing between properly decoded pulses and lower intensity, improperly decoded multiaccess interface. We are performing ultrashort pulse optical thresholding experiments at 1.5 microns using GaAs waveguides. Thresholding occurs because the number of carriers generated by two photon absorption is expected to vary inversely with pulse width for fixed pulse energy. Therefore, a short intense pulse will generate more carriers than a longer, less intense pulse. Our new contributions are (1) demonstration of proper scaling with pulse width in the femtosecond to picosecond regime and (2) demonstration of subnanosecond electrical response.

Descriptors :   *PULSED LASERS, THRESHOLD EFFECTS, GALLIUM ARSENIDES, OPTICAL WAVEGUIDES, TWO PHOTON ABSORPTION, SHORT PULSES, DECODING, LOW INTENSITY.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE