Systems and methods for coupling a fiber to a polarization sensitive photonic integrated circuit
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United States of America Patent
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Dec 26, 2017
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Dec 31, 2015
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Dec 31, 2015
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Abstract
The integrated network element offers an efficient fiber-chip coupling of multiple outputs of a polarization sensitive photonic integrated circuit (PIC) using a programmable mirror co-packaged with the PIC. Efficient fiber-chip coupling requires precise and active alignment of all free-space components. These constraints can be reduced by using a programmable mirror in the form of a liquid crystal on silicon (LCoS) device. The LCoS can be programmed with patterns that offer highly accurate beam-steering and focusing functionality. Imaging optics may be used at the PIC facet to provide some degree of collimation in the free-space optical path to efficiently illuminate the LCoS. By reprogramming the LCoS switching between two outputs/inputs can be obtained at high speed.
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