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Analysis and optimization of an InGaAsP/InP waveguide variable optical attenuator |
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| Authors: | Yongzhuo Zou Jian-Jun He |
| Affiliation: | a Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China b Lightip Technologies, Inc. Ottawa, Canada ON K1K 4R8 c Division of Electromagnetic Theory, Alfven Laboratory, Royal Institute of Technology, S-100 44 Stockholm, Sweden |
| Abstract: | An InGaAsP/InP waveguide variable optical attenuator (VOA) is proposed in this paper. The device consists of straight input and output waveguides and an S-bend waveguide. An electrode is deposited on a portion of the waveguide to form an active region so that its refractive index can be modified by a current injection, resulting in the variation of the transmitted optical power. The beam propagation method is employed in the numerical simulation and the device structure is optimized using a genetic algorithm. The optimized VOA has a low excess loss (<1 dB) and a large dynamic range of about 40 dB. |
| Keywords: | 42.82.Gw 42.82.&minus m |
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