Accession Number : ADA313832

Title :   Inverted Optical Modulators for Communications Networks.

Descriptive Note : Final rept. Jan 95-Jan 96,

Corporate Author : ARIZONA BOARD OF REGENTS TUCSON

Personal Author(s) : Peyghambarian, N.

PDF Url : ADA313832

Report Date : JUL 1996

Pagination or Media Count : 31

Abstract : The design and fabrication of a Kerr Lens Modelocked (KLM) chromium-doped forsterite laser is described. The KLM forsterite laser allows the study of ultrafast optical and electronic properties of materials in the near-IR with femtosecond time resolution. In particular, the laser produces sub-200 femtosecond pulses (tunable between 1240 and 1285 nm) with 2 kw of peak power at a 93 MHz repetition rate. The KLM forsterite laser was used in a degenerate pump-probe experiment to investigate the heavy-bole exciton dynamics of GaInAlAs/AlInAs multiple quantum wells. By tuning the laser to various wavelengths in the heavy-hole exciton region, both differential transmission and dephasing as a function of pump-probe delay were investigated. Ultrafast dynamics, such as the optical Stark effect, two photon absorption, and absorption bleaching, were readily observed.

Descriptors :   *OPTICAL COMMUNICATIONS, *LIGHT MODULATORS, LASER PUMPING, REPETITION RATE, QUANTUM WELLS, TRANSMITTANCE, PEAK POWER, COMMUNICATIONS NETWORKS, TUNING, TWO PHOTON ABSORPTION, STARK EFFECT, EXCITONS, MODE LOCKED LASERS, KERR MAGNETOOPTICAL EFFECT, GALLIUM ARSENIDE LASERS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE