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Title: Tolerant wideband high-efficiency grating coupler for TM mode excitation
Authors: Liow, Tsung-Yang
Zhang, Jing
Shum, Perry Ping
Xiao, Zhe
Luan, Feng
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Xiao, Z., Luan, F., Liow, T.-Y., Zhang, J., & Shum, P. (2012). Tolerant wideband high-efficiency grating coupler for TM mode excitation. 2012 Photonics Global Conference (PGC).
Abstract: An optimized grating coupler featuring both ultra-broad bandwidth and high-efficiency has been achieved for the first time for the +1 diffraction order at a central operating wavelength 1.55 μm for TM polarization in horizontal slot waveguides. With proper design of the thickness of the groove thickness in grating region, we achieved a 60 nm 1 dB bandwidth, and the 3 dB bandwidth is 92 nm covering the entire C-band, and most of L-band and S-band. It is nearly two times more than the previously reported value. Maximum coupling efficiency of 65% has been achieved for positive detuned grating couplers with incident light from SMF at 8o. Sensitivity to fabrication and alignment tolerances of the structure has been analyzed.
Rights: © 2012 IEEE.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Conference Papers

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