400 MHz Traveling Wave Modulator

Hu Demin

doi:10.1117/12.957998

17 December 1979 400 MHz Traveling Wave Modulator

Hu Demin

Proceedings Volume 0197, Modern Utilization of Infrared Technology V; (1979) https://doi.org/10.1117/12.957998
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A wide band laser modulator is designed on the basis of electro-optic modulation principle. A trgvelling wave mode is adopted. A piece of 3x3x80 mm³ single crystal GaAs is used as the modulating crystal. The output power from the high frequency generator'is over 250W with 50ohm output impedance in the frequency range of 30 MHz to 400 MHz. The electrical matching between the modUlator and the generator is good. The bandwidth of the modulator is measured to be 400 MHz. Intensity modulation experiments are performed with a CO₂ laser. High frequency HgCdTe infrared detectors in metal dewar are measured with this system to have a time constant below 1 ns.

Citation Download Citation

Hu Demin "400 MHz Traveling Wave Modulator", Proc. SPIE 0197, Modern Utilization of Infrared Technology V, (17 December 1979); https://doi.org/10.1117/12.957998

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