专利名称：Method and apparatus for polarization
tracking in wireless optical communicationsystems
发明人：Jeffrey C. Adams,Mark Pratt,Micah J. Barclay申请号：US09627279申请日：20000728公开号：US06490070B1公开日：20021203
专利附图：
摘要：A polarization of a light signal is modulated to provide polarization tracking in awireless optical communication system. The light signal having the modulated
polarization, such as a sinusoidally varying polarization, is transmitted from an opticaltransmitter having polarization-maintaining fiber. The light signal having the modulatedpolarization is received at an optical receiver. A portion of the light signal is directed toan analyzer that detects the modulated polarization and generates an amplitude-modulated light signal corresponding to the modulated polarization. The amplitude-modulated light signal is directed to a tracking detector, such as a quad cell detector,that generates an amplitude-modulated electronic signal corresponding to theamplitude-modulated light signal. The amplitude-modulated electronic signal can besubsequently used to control or perform tracking of the optical receiver. Such trackingcan include adjustment of an orientation of the optical receiver with respect to the lightsignal received from the transmitter.
申请人：TERABEAM CORPORATION
代理机构：Blakely Sokoloff Taylor & Zafman LLP
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