Frequently Asked Questions

RTP stands for Rubidium Titanyl Phosphate and it is a desirable crystal material for electro-optic modulators and Q-switches due to its natural birefringence.

RTP always works in pairs which are carefully matched to compensate the birefringence. The laser light propagates either in X-axis or Y-axis, and is polarized along the diagonal of the input face, and is rotated by 90° in the second crystal. The "slow" ray in the first crystal then becomes the "fast" ray in the second and the total static birefringence is thus in theory cancelled in the crystal pair.

RTP is most suited to moderate average power laser sources where high repetition rates and short Q-switched pulse lengths are more important than high average powers.

Some features of RTP include its suitability for electro-optical applications at high repetition rates, large nonlinear optical and electro-optical coefficients, low half-wave voltage, and no piezoelectric ringing. It is also non-hygroscopic.

Some applications of RTP include Q-switching for laser ranging, laser radar, medical lasers, and industrial lasers. It can also be used for laser power/phase modulation and pulse picking.

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