论文信息 - A four-port polarization diversity coupler for vertical fiber-chip coupling

A four-port polarization diversity coupler for vertical fiber-chip coupling

We propose and fabricate a novel four-port polarization diversity coupler for vertical coupling. With the help of 45° reflectors and improved 2×1 couplers, an ultralow coupling loss of -4.8dB is experimentally measured with polarization insensitivity.

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