Abstract
Environmental monitoring and defence applications call for efficient mid-infrared tunable sources. To reach such a goal, one can take advantage of optical parametric oscillators (OPO) pumped by near infrared commercial laser sources. Semiconductors of the main technological stream (GaAs, InP and ZnSe) are good candidates due to high transparency in the 1-15 μm range, good mechanical properties, high optical damage threshold and particularly high χ(2) values. Integration with the pumping source may also be envisaged. Flowever, these materials are isotropic, so that birefringence phase matching is impossible.
© 2002 Optical Society of America
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