VARIABLE DISPERSION COMPENSATOR

摘要

PROBLEM TO BE SOLVED: To provide a variable dispersion compensator having a wide band characteristic with a flat transmission band and giving a high dispersion compensation value by a larger phase difference. SOLUTION: An optical coupling loss in a peripheral band of an operation band is significantly decreased by combining a PLC (planar lightwave circuit) and a spatial optical system and disposing structural elements in line symmetry. A reflection type spatial phase modulator can be used. As the reflection type spatial phase modulator such as an LCOS (liquid crystal on silicon), a large dispersion compensation value can be set and a more flexible dispersion compensation pattern can be achieved. COPYRIGHT: (C)2009,JPO&INPIT