Polaroid Corporation

James M Connors

Norman A Sanford

Amaresh Mahapatra

William A Dyes

Optimal sum-frequency and second harmonic generators are fabricated in ferroelectric waveguides by taking into account the interference between generated beams of Cerenkov radiation.

Proton-exchanged waveguides for sum-frequency generation

An M.times.N coupler uses a planar waveguide to couple each of M input channel waveguides to each of N output channel waveguides, the input guides and the output guides being disposed on opposite sides of the planar waveguide. Uniformity of coupling is improved by joining the input channel waveguides to the planar waveguide in a manner to focus the beams emitted by each input guide into the planar waveguide at a common focal point located near the center of the edge where the output guides join the planar waveguide.

Star coupler

A TE-TM mode converter utilizes a Y-cut lithium niobate crystal which includes a straight titanium-diffused channel extending along the Z-axis of the crystal. A parallel pair of electrodes lie symmetrically on opposite sides of the channel. a.c. and d.c. voltage supplies are connected to the electrodes to supply voltages so as to effect complete conversion from one direction of polarization to the other direction of polarization of a wave applied as an input to one end of the channel for abstraction at the opposite end.

Growing community of inventors

Buzzards Bay, MA, United States of America

James M Connors