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Terms
  • crystal A solid with a structure that exhibits a basically symmetrical and geometrical arrangement. A crystal may already possess this structure, or it may acquire it through mechanical means. More than 50 chemical substances are important to the optical...
  • lithium niobate (LiNbO3) A crystalline ferroelectric material used primarily as a substrate and an active medium for thin-film optical modulators and switches. It possesses very high electro-optic and piezoelectric coefficients.
  • optical parametric oscillator (OPO) A laser-pumped crystal with nonlinear optical properties inside of an optical resonator in which the output generates coherent light whose output can be tuned continuously over a variety of infrared and visible wavelengths.    ...
  • Q-switch A device used to rapidly change the Q of an optical resonator. It is used in the optical resonator of a laser to prevent lasing action until a high level of inversion (optical gain and energy storage) is achieved in the lasing medium. When the...
  • optical path difference (OPD) The relative path difference (or phase shift) traveled between two rays that pass through different mediums from the same object point.  For a perfect optical system, the optical path, or distance, from an object point to a corresponding image...
  • modulator See acousto-optic modulator; electro-optic modulator.
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