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Optical receiver and demultiplexer for free-space wavelength division multiplexing communications systems
Optical receiver and demultiplexer for free-space wavelength division multiplexing communications systems
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机译:用于自由空间波分复用通信系统的光接收机和解复用器
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摘要
A free-space wavelength division multiplexing system is provided having a demultiplexer and receiver arrangement. The demultiplexer and receiver arrangement may be based on a rotatable interference filter. A desired wavelength can be selected by adjusting the angle of the interference filter with respect to the incoming light beam. Alternatively, the demultiplexer and receiver arrangement may be based on a diffraction grating. Multiple wavelengths of light are diffracted at different angles, which spatially separates each wavelength in the system. A corresponding multiple-element linear photodetector array is used to receive the spatially separated optical signals.
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