Accession Number : ADA328276

Title :   Single Mode Twenty Atmosphere CO2 Laser.

Descriptive Note : Final rept. 1 Sep 93-31 Mar 97,

Corporate Author : ALABAMA UNIV UNIVERSITY

Personal Author(s) : Izatt, Jerald R.

PDF Url : ADA328276

Report Date : 05 JUN 1997

Pagination or Media Count : 30

Abstract : A high power, UV preionised, twenty-atmosphere CO2 laser has been designed and constructed Its primary line narrowing and tuning configuration comprises a two-grating/retromirror assembly in which both gratings are worked near grazing incidence and double passed. It is used in a three-mirror resonator cavity. In preliminary tests the new laser has produced 130 nsec, 200 mJ pulses with a linewidth less than 200 MHz, which can be tuned continuously in the P and R branches of both the 0001 - 1000 and 0001 - 0200 bands. This performance exceeds by a wide margin any results reported in the open literature. Wave-length tuning, pulse initiation, and data acquisition are computer controlled. One planned use of the new laser is to investigate the double Raman effect and other nonlinear processes in far infrared lasers. An international team of scientists participated in the design of the laser. During their stay at Alabama they also conducted, as part of this project, research on four-wave mixing, two-photon absorption and lasing without inversion, all in far-infrared laser gases. Brief reports of these studies are included in this report.

Descriptors :   *CARBON DIOXIDE LASERS, FREQUENCY, HIGH POWER, TUNABLE LASERS, FAR INFRARED RADIATION, INFRARED LASERS, NONLINEAR SYSTEMS, PULSES, DATA ACQUISITION, TUNING, QUANTUM ELECTRONICS, TWO PHOTON ABSORPTION, RAMAN SPECTRA, LASER GASES, GRAZING.

Subject Categories : Inorganic Chemistry
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE