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ARROW-B type polarization splitter with asymmetric Y-branch fabricated by a self-alignment process

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3 Author(s)
Hayakawa, T. ; Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan ; Asakawa, S. ; Kokubun, Y.

We have proposed and demonstrated a polarization splitter based on an ARROW-B type waveguide. This device has an asymmetric Y-branch configuration, connecting a waveguide with a large modal birefringence to a low-birefringent waveguide which is channeled by a stripe lateral confinement structure. The device can achieve a high extinction ratio without precise mask alignment, since these two waveguides are connected by a self-alignment process. In addition, a low insertion loss is achieved because of adiabatic Y-branching. We designed this device at the wavelength of 1.55 μm and fabricated it using RF sputtering. As a result, high extinction ratios of -19.4 dB for TE mode and -19.0 dB for TM mode were achieved

Published in:

Lightwave Technology, Journal of  (Volume:15 ,  Issue: 7 )

Date of Publication:

Jul 1997

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