Title :
ARROW-B type polarization splitter with asymmetric Y-branch fabricated by a self-alignment process
Author :
Hayakawa, Tomokazu ; Asakawa, Shuichiro ; Kokubun, Yasuo
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
fDate :
7/1/1997 12:00:00 AM
Abstract :
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
Keywords :
birefringence; integrated optics; optical fabrication; optical losses; optical polarisers; optical waveguide components; 1.55 mum; ARROW-B type polarization splitter; ARROW-B type waveguide; RF sputtering; SiO2-TiO2; TE mode; TM mode; asymmetric Y-branch; high extinction ratios; integrated photonics; large modal birefringence waveguide; low insertion loss; low-birefringent waveguide; self-alignment process fabrication; stripe lateral confinement structure; Birefringence; Dielectric materials; Directional couplers; Extinction ratio; Glass; Optical polarization; Optical receivers; Optical waveguides; Photonics; Tellurium;
Journal_Title :
Lightwave Technology, Journal of
