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Optical beamsplitter for a polarization insensitive wavelength detector and a polarization sensor
Optical beamsplitter for a polarization insensitive wavelength detector and a polarization sensor
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机译:用于偏振不敏感波长检测器和偏振传感器的分光镜
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摘要
A wavelength detector is described. The wavelength detector includes a beamsplitter having a wedged back surface with respect to the front surface to reflect the incoming optical signal into two paths. Filters, at least one of which varies with wavelength of the optical signal are in each of the said paths. The filtered light in the two paths is detected by a photodetector and the output electrical signals are log amplified. The log amplified signals are applied to a difference amplifier whose output is indicative of the wavelength or polarization of the incident optical signal.
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