| Citation: |
Zhang Yun, Zuo Yuhua, Guo Jianchuan, Ding Wuchang, Cheng Buwen, Yu Jinzhong, Wang Qiming. A High-Efficiency Fiber-to-Waveguide Coupler with Low Polarization Dependence Using a Diluted Waveguide in InP Substrate with a 1.55μm Wavelength[J]. Journal of Semiconductors, 2008, 29(1): 55-62.
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Zhang Y, Zuo Y H, Guo J C, Ding W C, Cheng B W, Yu J Z, Wang Q M. A High-Efficiency Fiber-to-Waveguide Coupler with Low Polarization Dependence Using a Diluted Waveguide in InP Substrate with a 1.55μm Wavelength[J]. J. Semicond., 2008, 29(1): 55.
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A High-Efficiency Fiber-to-Waveguide Coupler with Low Polarization Dependence Using a Diluted Waveguide in InP Substrate with a 1.55μm Wavelength
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Abstract
We propose a fiber-to-waveguide coupler for side-illuminated p-i-n photodiodes to obtain high responsivity and low polarization dependence that is grown on InP substrate and is suitable for surface hybrid integration in low cost modules.The fiber-to-waveguide coupler is based on a diluted waveguide,which is composed of ten periods of undoped 120nm InP /80nm InGaAsP (1.05μm bandgap) multiple layers.Using the semi-vectorial three dimensional beam propagation method (BPM) with the central difference scheme,the coupling efficiency of fiber-to-waveguide under different conditions is simulated and studied,and the optimized conditions for fiber-to-waveguide coupling are obtained.For TE-like and TM-like modes,the calculated maximum coupling efficiency is higher than 94% and 92%,respectively.The calculated polarization dependence is less than 0.1dB,showing good polarization independence.-
Keywords:
- diluted waveguide,
- BPM,
- fiber-to-waveguide,
- waveguide photodiode
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References
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