Incoherent-to-coherent conversion and square-law transmission based on photoinduced birefringence in bacteriorhodopsin films.
We review the main optical properties of bacteriorhodopsin that are relevant to its use as a spatial light modulator. A model is described for the transmittance of a film placed between crossed polarizers in which photoinduced birefringence occurs. We show when the transmittance is proportional to the write intensity. We use this property in a joint transform correlator for incoherent-to-coherent conversion and effective square-law modulation in the Fourier plane.
Sánchez-de-la-Llave
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Department of Electrical and Computer Engineering, University of Massachusetts-Lowell, One University Avenue, Lowell, Massachusetts 01854, USA.
Fiddy
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