Measurement of depletion region width in poled silica.

The width of the depletion region in fused-silica samples thermally poled during various periods of time is investigated experimentally with four previously reported characterization techniques in an attempt to unify their findings. Although all measurements give a similar width of the depletion region, it is shown that the determination of the profile of chi(2) is also required for a good estimate of the nonlinearity induced by poling.

Time evolution of frozen-in field during poling of fiber with alloy electrodes.

Twin-hole fibers were provided with Au-Sn alloy electrodes and thermally poled at 255 degrees C. The evolution of the depletion layer was studied by etching fibers poled at varying poling temperatures. The electro-optic response was measured for different poling times.

Wide wedge-shaped depletion region in thermally poled fiber with alloy electrodes.

A twin-hole fiber was provided with Au-Sn alloy electrodes and thermally poled at 255 masculineC with 4.3 kV applied during 155 minutes. An electric field 6X107 V/m was recorded.

Widely tunable fiber-coupled single-frequency Er-Yb:glass laser.

A fiber-coupled tunable Er-Yb:glass minilaser is presented with output power of 40 mW. The laser can be stepwise tuned in single-frequency operation from 1530 to 1560 nm by compressing a fiber Bragg grating that provides selective feedback. Constant output power (fluctuation < 0.