Electro Optic Laser Frequency Shifter
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
A single frequency continuous wave laser bean can be frequency shifted by 10 GigaHertz or more with a switching time of 100 picoseconds by the use of an electro-optic crystal mounted to intercept the laser beam external to the cavity of the laser. The electro-optic crystal, lithium tantalate (LiTaO(3)), is driven by a DC voltage pulse generator. The laser frequency shift can be monitored by a heterodyne beat technique using a resonant sample and a fast photodetector and sampling oscilloscope.