Apparatus and method for frequency modulating a waveguide laser

Details Apparatus and method for frequency modulating a waveguide laser Apparatus and method for frequency modulating a waveguide laser

1990-05-03

1991-05-28

Moskowitz, Nelson

Coherent light generators

Particular beam control device

Producing plural wavelength output

372 28, 356 5, G01C 308, G01P 336, H01S 3082

Patent

active

050200623

ABSTRACT:
A CO.sub.2 waveguide laser frequency modulation (FM) system which applies the Fourier series components of a triangular drive waveform selectively to the tuning PZT at one end of the waveguide and the FM PZT at the other end to achieve an improvement over the waveform than can be achieved by applying the fundamental and its harmonics to the FM PZT alone. The system applies the fundamental component to the tuning PZT and the odd harmonics to the FM PZT. The frequency-separated drive signals are applied in proper phase to the PZT's at each end of the waveguide via waveform synthesizer, frequency splitter and amplifiers. The waveform synthesizer includes a ROM containing digitized values of segments of the waveform amplitudes and a digital-to-analog converter for converting the digital ROM data to an analog signal.

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Luzitano, R. D.; "Comparison of Control . . . Laser"; NTIS AD-AO85 707/8, Masters Thesis, 1/80; abst. supplied.
Washwell et al.; "Linear FM-CW Laser Radar . . . "; Electro-Opt. Eng., vol. 572, pp. 133-137, 8/21/85; abst. supplied.
Shotton et al.; "An Electronic Servocontrol . . . "; NTIS N77-29857/8, National Phys. Lab.; abst. supplied.

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