Abstract
Description of an original technique for control of the spectral response of narrow-band optical filters in photorefractive crystals and results of experimental demonstration in both volume and integrated optical configurations are given. Two control mechanisms are considered. The limitations in the selectivity, tuning range, insertion losses, and speed of spectral response control are discussed. Some promising applications, in particular, for spectral coding of optical signals in telecommunication systems, are proposed. Experimental demonstration of formation, transmission, and detection of a frequency shift keying optical signal by using an electrooptically controlled Bragg grating was carried out.
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