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- W2023443003 abstract "We propose a novel TE/TM mode splitter for an integrated optical detection device for magneto-optical disk pickup. The new mode splitter is monolithically integrated on a Si substrate with pin-photodiodes. This device is composed of optical waveguides A and B with effective indices of refraction N<SUP>A</SUP> and N<SUP>B</SUP>, where N<SUP>A</SUP> > N<SUP>B</SUP>. These two waveguides are connected by a tapered transition region. The light wave guided in waveguide A is incident on the tapered transition region at an angle of incidence greater than the critical angle for the TE<SUB>0</SUB> mode and smaller than the critical angle for the TM<SUB>0</SUB> mode. The TE<SUB>0</SUB> mode is totally reflected and the TM<SUB>0</SUB> mode is totally transmitted at that region so that this device works as a TE/TM mode splitter. We fabricated the mode splitter's tapered transition region using a novel wet etching process, then examined the TE/TM mode splitting operation using a GaAlAs laser diode ((lambda) equals 0.788 micrometers ). When both TE<SUB>0</SUB> and TM<SUB>0</SUB> modes were exited in waveguide A, the extinction ratios of the TE<SUB>0</SUB> and TM<SUB>0</SUB> modes were measured with the integrated photodiodes. The extinction ratios were -25.4 dB for the TE<SUB>0</SUB> mode and -23.3 dB for the TM<SUB>0</SUB> mode. These values are sufficient for practical application. Furthermore, the polarization detection function was experimentally confirmed using a Faraday rotator." @default.
- W2023443003 created "2016-06-24" @default.
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- W2023443003 date "1993-01-13" @default.
- W2023443003 modified "2023-09-26" @default.
- W2023443003 title "TE/TM mode splitter with waveguide photodetectors" @default.
- W2023443003 doi "https://doi.org/10.1117/12.138893" @default.
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