Abstract

By mixing two copropagating coherent beams near 1μm in a zinc blende GaP crystal, we have efficiently generated coherent terahertz (THz) waves. Such efficient conversion is made possible by use of a reststrahlen band in the THz region to achieve phase matching in an isotropic crystal. A tuning range as wide as 71.12830μm (0.1064.22THz) was achieved, whereas the highest output peak power reached 15.6W at 173μm. To obtain such a tuning range we continuously tuned the wavelength of one coherent infrared beam within a bandwidth of 15.3nm.

© 2005 Optical Society of America

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