RESEARCH TOWARD A TUNABLE COHERENT LIGHT SOURCE.
Final technical rept. for 1 May 64-30 Apr 65,
PERKIN-ELMER CORP NORWALK CONN ELECTRO-OPTICAL DIV
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The goal of the program is the development and demonstration of a tunable coherent light source based on nonlinear optical effects. An intermediate goal is the demonstration of parametric gain at optical frequencies. An apparatus was designed and constructed which is able to measure small gains or losses and which is named the Optical Marginal Oscillator. The most recent version of the optical marginal oscillator is just about sensitive enough to measure the optical parametric effect expected in a specific experiment using two CW He-Ne lasers and crystal of ADP. A device, to produce a controlled loss of small magnitude was designed, built, and tested. The controlled loss may be made to be of the same size as the loss which is expected to be produced by the parametric effect in this experiment and has been used successfully to evaluate the marginal oscillator. Data were obtained on the performance of the optical marginal oscillator and on the dependence of its performance on the principal adjustable parameters, which are the oscillator light level and the modulation frequency. At the end of the current contract we are setting up the experiment to measure parametric gain.