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A fabrication-tolerant high-performance polarizing beam splitter (PBS) is proposed and demonstrated with silicon-on-insulator nanowire waveguides. This PBS is realized with cascaded bent direction couplers, which is designed to make the phase-matching condition satisfied for the transverse-magnetic (TM) polarization mode. There is significant phase-mismatch for the transverse-electric (TE) polarization...
We report a gain-enhanced and spectral-narrowed optical parametric oscillator based on a monolithic PPLN integrating an optical parametric generator with two electro-optically active polarization-mode converters. Unique spectral manipulation of the OPO signal is also demonstrated.
Ultra-high-quality (Q>4times106) microdisk resonators are demonstrated in a Si3N4 platform at 655 nm with straight and curved in-plane coupling waveguides on a Si substrate. Selective coupling to specific radial orders and polarizations is demonstrated with phase-matching. TM modes show higher sensitivity to environmental modifications for sensing.
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