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Proceedings Paper

Real Time Recording Medium: Photodichroic KF: LiF
Author(s): William C. Collins; Milton O. Greer
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Paper Abstract

Laser recording and readout measurements using the photodichroic crystal KF:LiF indicate that the material has potential as an input transducer and an adaptive spatial filter in an optical spectrum analyzer, These crystals are among the most photosensitive recording materials without gain, can be produced in large sizes at relatively low cost, and can be operated close to room temperature using thermoelectric coolers. Experiments using a high precision laser scanner providing 96.6 MHz subnanosecond pulses at 514 nm show that adequate recording can be accomplished with exposures less than 10 mJ/cm2. An MTF of 40% at 72 ℓ/mm was measured with uniform readout illumination of the recorded signal, but this is reduced if the signal is recovered by rescanning due to the convolution of the scanning beam profile with the recorded spot profile. The readout is destructive at the recording wavelength but can be readout with a much reduced decay rate by using 488 nm. The linear dynamic range in the Fourier plane was measured to be 40 dB.

Paper Details

Date Published: 13 December 1977
PDF: 10 pages
Proc. SPIE 0123, Optical Storage Materials and Methods, (13 December 1977); doi: 10.1117/12.955805
Show Author Affiliations
William C. Collins, Naval Research Laboratory (United States)
Milton O. Greer, Harris Corporation (United States)

Published in SPIE Proceedings Vol. 0123:
Optical Storage Materials and Methods
Leo Beiser; Di Chen, Editor(s)

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