Journal
OPTICS LETTERS
Volume 44, Issue 1, Pages 102-105Publisher
Optica Publishing Group
DOI: 10.1364/OL.44.000102
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Funding
- National Key R&D Program of China [2017YFA0303700]
- National Natural Science Foundation of China (NSFC) [11374211, 11690033, 61734005]
- Science and Technology Commission of Shanghai Municipality (STCSM) [15QA1402200, 16JC1400405, 17JC1400403]
- Shanghai Municipal Education Commission (SMEC) [16SG09, 2017-01-07-00-02-E00049]
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We present a rotated polarization directional coupler (RPDC) on a photonic chip. We demonstrate a double-track approach to modify the distribution of the refractive index between adjacent tracks and form a single waveguide with an arbitrary birefringent optical axis. We construct a RPDC with the two axis-rotated waveguides coupled in a strong regime. The obtained extinction ratios on average are about 16 dB and 20 dB for the corresponding orthogonal polarizations. We perform reconstruction of the Stokes vector to test the projection performance of our RPDC, and observe the average fidelities up to 98.1% and 96.0% for the perfectly initialized states in 0 degrees and 45 degrees RPDCs, respectively. (C) 2018 Optical Society of America
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