Browdy and Neimark, P.L.L.C.
Adaptive dispersion compensation device and control method for the same
An adaptive dispersion compensation device offered performs stably the dispersion compensation, inclusive of waveform shaping, for an optical fiber transmission line. The device comprises a plurality of basic units each including a chirp-bragg fiber grating which is formed in an optical waveguide, a reflection mirror which is disposed on the light input side of the chirp-bragg fiber grating by being detachable and an optical circulator which is connected to the reflection mirror, means of connecting the basic units in series, and means of controlling the dispersion characteristics of each chirp-bragg fiber grating by applying a temperature gradient to it along its axis. The individual chirp-bragg fiber gratings with the application of temperature gradients vary the dispersion quality of the lights passing through the basic units, thereby controlling the dispersion quality of the input signal light stably and releasing the compensated signal light.
NEC Corporation Matsushita Electric Industrial Co., Ltd. Hitachi, Ltd.
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Akira Shinichi Kensuke
Suzuki Wakabayashi Ogawa