Optical package providing efficient coupling between DFB-LD and silicon PIC edge couplers with low return loss
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United States of America Patent
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Oct 10, 2017
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app pub date -
Apr 29, 2016
filing date -
May 5, 2015
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Abstract
An optical package for providing efficient coupling between a distributed feedback laser diode (DFB-LD) and a silicon photonic integrated-circuit chip (Si PIC) edge couplers with low return loss, as well as variations thereof, is described. The optical package may include a DFB-LD, a Si PIC, a single mode fiber or fiber array assembly, a lens and a spacer. The Si PIC may include an input edge coupler and an output edge coupler. The single mode fiber or fiber array assembly may be aligned to the output edge coupler. The lens may be disposed between the DFB-LD and the input edge coupler, and may be configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the input edge coupler of the Si PIC. The spacer may be bonded to a facet of the input edge coupler with an index matching fluid.
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