Accession Number : AD0725067

Title :   Stark Effect Modulation Studies.

Descriptive Note : Final rept. 18 Mar 68-31 Dec 70,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OHIO DIV OF ELECTRICAL SCIENCES AND APPLIED PHYSICS

Personal Author(s) : Pao,Yoh-Han ; Claspy,Paul C. ; Johnson,W. B.

Report Date : 18 MAR 1971

Pagination or Media Count : 73

Abstract : It has been determined that it is practical to use the molecular Stark effect in gases to modulate laser radiation in the 10 micron region. A large number of suitable modulator gas constituents have been studied and parameters governing gas cell modulator design have also been identified. Such modulators may be used both within and external to the laser cavity. In intra cavity configurations, large modulation depths are easily obtained with low modulator power. Results of theoretical studies indicate that within the frequency ranges of practical interest, there is no intrinsic limit to the frequency response. However when modulating frequency is larger than the value of the homogeneous linewidth, there is a decrease in effectiveness. Experimental results showing non-dispersive modulation at frequencies to 30 megahertz have been obtained. (Author)

Descriptors :   (*COHERENT RADIATION, FREQUENCY MODULATION), (*GAS LASERS, STARK EFFECT), GAIN, HARMONIC ANALYSIS, ABSORPTION SPECTRA, INFRARED LASERS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE