The principles of operation and the results of performance measurements are reported of a
new type of coherent optical receiver that used a dynamic volume index of refraction grating …

Performance measurements are reported for a coherent homodyne optical communication
receiver that contained an iron-doped indium phosphide photorefractive beam combiner …

The use of two-wave mixing in photorefractive (PR) materials in a homodyne detection
receiver structure is studied. The interaction between a strong local oscillator optical field …

Photorefractively induced index-of-refraction phase gratings are shown to combine
coherently the optical fields of a strong pump and a suitably amplitude-or phase-modulated …

An adaptive photorefractive heterodyne receiver that uses a spatially injection-locked
oscillator is demonstrated. The local oscillator consists of a resonator of two facing phase …

The use of a photorefractive material as an adaptive beam combiner is described. The beam
combiner is demonstrated in an interferometric optical signal processor. The photorefractive …

The performance limitations of coherent lightwave communication technologies are
examined. Their practical device requirements, with emphasis on optical …

Orthogonally polarized four-wave mixing is studied theoretically in a configuration involving
two coupling coefficients with different magnitudes, one of which is effectively zero. The …

We describe various image bearing oscillations originating in one, or two coupled photo-
refractive crystals, which can support phase and amplitude modulation as well as multimode …

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