Patent ID: 6804467
Filing Date: 2004-10-12
Classification: G02B,H04B

Abstract:
A dispersion compensation device for compensating a dispersion of an optical input beam, the device comprising:polarization dependent beam routing means having an input port, for routing a polarized optical beam launched into the input port along a first path in one of two directions in dependence upon the polarization state of the polarized optical beam, at least one multi-cavity etalon defining at least two resonant cavities, optically coupled to the routing means for receiving at least one optical beam from the routing means and for directing at least one reflected optical beam back to the routing means for the reflected light beam to follow a second path in the routing means; and at least one polarization rotator for rotating the polarization of light in the optical path between the routing block and the etalon so that the at least one reflected light beam follows the second path in the routing means, whereby the polarized light beam launched into the input port undergoes multiple reflections from the etalon to reduce dispersion of the optical input beam.