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An electrically addressed liquid crystal filter for tunable lasers.
Gleeson, Helen F.; Murray, Andrew J.; Fraser, Ellen; Zoro, Alex
Optics Communications. 2002;212:165-168.
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Abstract
A ferroelec. liq. crystal device has been used as an elec. addressable birefringent tuning element in a linear dye laser. The device operates within the laser cavity and replaces the manually adjusted birefringent filter that previously provided the wavelength selection mechanism. The device demonstrates switching between two selected wavelengths at rates of 10 kHz with potential to increase this to around 1 MHz. The lasing wavelengths allowed by the device are detd. by the retardance, the ferroelec. tilt angle and the relative orientation of the device symmetry axis and the laser polarisation axis. Lasing was demonstrated for two device orientations, switching between wavelengths of 583.2 and 587.5 nm and from 569 to 591 nm. [on SciFinder (R)]
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