25 February 1981 Amorphous As2S3 Film Waveguide With Optical Grating Devices
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Abstract
Fundamental waveguiding properties of amorphous As2S3 film and some applications to passive optical grating devices are presented. The propagation losses of amorphous As2S3 film waveguides were measured t be 4.4 dB /cm. at 0.633 µm. and 1.4 dB /cm. at 1.153 µm. Chalcogenide amorphous semiconductors are characterized by the photoinduced refractive index change. Utilizing this phenomenon, the grating with the period of 0.35 µm and the length of 0.7 mm is fabricated in the As2S3 film. waveguide as the grating deflector with. a two-beam interference technique. A guided wave of 1.153 pm, TM.0 mode, has been deflected approximately with the deflection. angle of 90° and with the efficiency of 100 %. With the same technique, the grating coupler with the period of 0.55 pa and the slant angle of 10.5° is fabricated and the coupling efficiency is 1.7- % at 1.153 µm.
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Tamaki Yaji, Yasuhiro Tejima, S hoichi Kurita, "Amorphous As2S3 Film Waveguide With Optical Grating Devices", Proc. SPIE 0239, Guided Wave Optical and Surface Acoustic Wave Devices: Systems and Applications, (25 February 1981); doi: 10.1117/12.959200; https://doi.org/10.1117/12.959200
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