发明名称 |
DYNAMIC OPTICAL FILTER HAVING A SPATIAL LIGHT MODULATOR |
摘要 |
An dynamic optical filter 10 is provided to selectively attenuate or filter a wavelength band(s) of light (i.e., optical channel(s)) or a group(s) of wavelength bands of an optical WDM input signal 12. The optical filter is controllable or programmable to selectively provide a desired filter function. The optical filter 10 includes a spatial light modulator 36, which comprises an array of micromirrors 52 effectively forms a two-dimensional diffraction grating mounted in a retro-reflecting configuration. Each optical channel 14 is dispersed separately or overlappingly onto the array of micro-mirrors 52 along a spectral axis or direction 55 such that each optical channel or group of optical channels are spread over a plurality of micro-mirrors to effectively pixelate each of the optical channels or input signal. Each channel 14 or group of channels may be selectively attenuated by flipping or tilting a selected number of micro-mirrors to thereby deflect a portion of the incident radiation away from the return optical path. The micro-mirrors operate in a digital manner by flipping between a first and second position in response to a control signal 56 provided by a controller 58 in accordance with an attenuation algorithm and an input command 60. The switching algorithm may provide a bit (or pixel) map or look-up table indicative of the state of each of the micro-mirrors 52 of the array to selectively attenuate the input signal and provide a modified output signal 38 at optical fiber 40. |
申请公布号 |
WO02082165(A3) |
申请公布日期 |
2003.10.30 |
申请号 |
WO2002US10490 |
申请日期 |
2002.04.03 |
申请人 |
CIDRA CORPORATION |
发明人 |
MOON, JOHN;KERSEY, ALAN, D.;SIRKIS, JAMES, S.;DUNPHY, JAMES;PINTO, JOSEPH;SZCZPPANEK, PAUL;DAVIS, MICHAEL |
分类号 |
G02B6/26;G02B6/34;G02B6/35;G02B6/42;G02B26/08;G02B27/10;H04J14/02;H04Q11/00 |
主分类号 |
G02B6/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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