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The emergence of easily-engineered bulk nonlinear media for quasi-phase-matched (QPM) interactions has enabled a new generation of highly efficient, non-critically-phase-matched (NCPM) devices. In particular, optical parametric oscillators (OPOs) based upon QPM materials such as periodically poled lithium niobate (PPLN) can operate with low thresholds, providing tunable output in the visible, near and mid-infrared spectral regions. This makes these devices attractive for spectroscopic and remote sensing applications provided that they can also provide versatile and rapid wavelength selection However traditional QPM OPO tuning mechanisms are based upon temperature control and crystal translation, and tend to be slow and cumbersome.
© 2000 IEEE
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