METHODS AND SYSTEMS FOR POLARIZATION CONTROL AND POLARIZATION MODE DISPERSION COMPENSATION FOR WIDEBAND OPTICAL SIGNALS
First Claim
1. A method for representing transmission of an optical signal through an optical system having frequency-dependent polarization effects, the method comprising:
- providing a model of the frequency-dependent polarization effects, wherein the frequency-dependent polarization effects cause wavelength dependent changes in the state of polarization (SOP) of the optical signal;
spatially dispersing frequency components of the optical signal on at least one spatial light modulator (SLM); and
independently adjusting the polarization transfer matrix of multiple regions of the at least one SLM based on the model to represent the optical signal transmission.
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Abstract
An optical processing method includes: receiving an optical signal from an optical system, wherein the optical signal is distorted by frequency-dependent polarization effects in the optical system; spatially dispersing frequency components of the distorted optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM to reduce the distortion of the optical signal. A related optical processing method includes: providing a precompensation signal indicative of frequency-dependent polarization effects in a downstream optical system; spatially dispersing frequency components of an optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM to at least partially precompensate the optical signal for distortions caused by the frequency-dependent polarization effects in the downstream optical system. Another related optical processing method includes: providing a model of the frequency-dependent polarization effects; spatially dispersing frequency components of the optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM based on the model to emulate the optical signal transmission.
57 Citations
24 Claims
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1. A method for representing transmission of an optical signal through an optical system having frequency-dependent polarization effects, the method comprising:
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providing a model of the frequency-dependent polarization effects, wherein the frequency-dependent polarization effects cause wavelength dependent changes in the state of polarization (SOP) of the optical signal; spatially dispersing frequency components of the optical signal on at least one spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the at least one SLM based on the model to represent the optical signal transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An optical system for representing transmission of an optical signal through a device having frequency-dependent polarization effects, the optical system comprising:
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a dispersive module positioned to receive the optical signal and spatially separate frequency components of the optical signal; at least one spatial light modulator (SLM) having multiple regions with an independently adjustable polarization transfer matrix, the at least one SLM positioned to receive the spatially separated frequency components on the multiple regions; and a controller coupled to the at least one SLM, wherein during operation the controller causes the at least one SLM to independently adjust the polarization transfer matrix of the multiple regions to represent the optical signal transmission based on a model of the frequency-dependent polarization effects, and wherein the frequency-dependent polarization effects cause wavelength dependent changes in the state of polarization (SOP) of the optical signal. - View Dependent Claims (23, 24)
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Specification