TUNABLE HOLOGRAPHIC DROP FILTER WITH QUASI PHASE-CONJUGATE FIBER COUPLING
摘要
The present invention is a method and apparatus for a rotating, tunable, holographic drop filter connected to a fiber optic source. The filter uses a quasi phase-conjugate optical system for a drop-channel fiber coupling and WDM channels which are introduced to the system. The light from these channels is collimated and passed through a volume phase holographic material (130) so that only one WDM channel is diffracted and the rest pass through the holographic material unaffected. A quasi phase-conjugate diffracted beam is generated by the optical system to reflect the diffracted channel back towards the holographic material (130). The reflected light is Bragg matched to the holographic material (130) so that it is re-diffracted along a path identical to the original incident light beam. A free-space circulator (110) may be used to direct the diffracted beam to a fiber optic collimator, which is different from the fiber optic collimator of the incident light beam.
申请公布号
WO02054114(A3)
申请公布日期
2003.01.30
申请号
WO2001US46966
申请日期
2001.12.04
申请人
CALIFORNIA INSTITUTE OF TECHNOLOGY
发明人
PSALTIS, DEMETRI;MOSER, CHRISTOPHE;STECKMAN, GREG;BUSE, KARSTEN;NEE, INGO;HUKRIEDE, JOERG;GOODMAN, JOSEPH, W.