Accession Number : ADA300860

Title :   Optical-to-Microwave Frequency Chain Utilizing a Two-Laser-Based Optical Parametric Oscillator Network,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s) : Wong, N. C.

PDF Url : ADA300860

Report Date : 13 SEP 1995

Pagination or Media Count : 7

Abstract : A method for building an optical to microwave frequency chain and for measuring optical frequencies relative to the cesium primary frequency standard is described. Based on optical frequency division via parametric oscillators, the concept is to generate two known ratios (1/2 and 4/9) of an optical calibration frequency f1 whose frequency difference is measured relative to the cesium clock. The (1/2) ratio is obtained by either a 2:1 frequency division of f1 or second-harmonic generation of (1/2) f1. The (4/9) ratio of f1 can be generated with a 3:1 frequency divider driven by a second laser at f2 that is chosen to be near (2/3)f1, which in turn is obtained with a f1-pumped 3:1 frequency divider. A set of auxiliary Optical Parametric Oscillators (OPOs) with outputs centered at (1/2)fi is used to facilitate the difference-frequency measurement between the two ratios. A practical configuration utilizing a YAG and a Ti: A12O3 laser and its application to a number of precision measurements of interest are presented.

Descriptors :   *OSCILLATORS, *LASER APPLICATIONS, *CHAINS, *MICROWAVE FREQUENCY, FREQUENCY, YTTRIUM ALUMINUM GARNET, MEASUREMENT, OPTICS, RATIOS, CLOCKS, CESIUM, PRECISION, FREQUENCY STANDARDS, DIFFERENCE FREQUENCY.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE