Active mode locking of a p-Ge hot-hole laser

J. N. Hovenier; Tjeerd O. Klaassen; W. Th. Wenckebach; Andrei V. Muravjov; Sergei G. Pavlov; Valery N. Shastin

doi:10.1117/12.331145

13 November 1998 Active mode locking of a p-Ge hot-hole laser

J. N. Hovenier, Tjeerd O. Klaassen, W. Th. Wenckebach, Andrei V. Muravjov, Sergei G. Pavlov, Valery N. Shastin

Proceedings Volume 3465, Millimeter and Submillimeter Waves IV; (1998) https://doi.org/10.1117/12.331145
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The p-Ge hot hole laser is as yet the only solid state tunable laser with a strong emission in the THz frequency range. Monte Carlo simulations have shown that modelocking of the laser on the intervalence band transition should be possible by gain modulation through the application of an appropriate rf electric field. Recently we did observe for the first time the generation of 200 picosecond pulses in the high frequency (approximately equals 100 cm^-1) emission range. Now also pulses as short as 100 ps have been observed in the low frequency regime (approximately equals 50 cm^-1). A detailed study of the wavelength dependent optical output of the laser has been started now for (normal) pulsed -- as well as for active mode locked operation. Results on pulse shape and small signal gain in the low frequency (equals low magnetic field) regime are given.

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J. N. Hovenier, Tjeerd O. Klaassen, W. Th. Wenckebach, Andrei V. Muravjov, Sergei G. Pavlov, and Valery N. Shastin "Active mode locking of a p-Ge hot-hole laser", Proc. SPIE 3465, Millimeter and Submillimeter Waves IV, (13 November 1998); https://doi.org/10.1117/12.331145

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KEYWORDS

Mode locking

Modulation

Pulsed laser operation

Picosecond phenomena

Terahertz radiation

Tunable lasers

Laser crystals

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