Patent ID: 6804428
Filing Date: 2004-10-12
Classification: G01J,G02B

Abstract:
An optical apparatus, comprising:an input port, providing a multi-wavelength optical signal; a polarization-separating element tat decomposes said multi-wavelength optical signal into first and second polarization components; a polarization-rotating element that rotates a polarization of said second polarization component by approximately 90-degrees; a wavelength-dispenser that separates said first and second polarization components by wavelength into first and second sets of optical beams respectively; an array of optical power sensors, positioned to receive said first and second sets of optical beams; and a modulation assembly, which is adapted to modulate said first and second sets of optical beams prior to impinging onto said array of optical power sensors, such that said first and second sets of optical beams impinge onto said array of optical power sensors in a time-division-multiplexed sequence.