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Proceedings Paper

Optimal design for a MMI to flatten the spectral response of an AWG
Author(s): Daoxin Dai; Qincun Zhou; Sailing He; Jianjun He
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Paper Abstract

A flattened spectral response for an arrayed-waveguide grating (AWG) can be obtained by using a multimode interference (MMI) coupler. In the present paper, an analytical expression for the flattened spectral response is derived by using a Gaussian approximation. A simple formula relating the optimal MMI length and the normalized separation is given. The normalized separation describes the separation between the peaks of the two fold images in the MMI region. With the present formula, the optimal value for the MM! length can be obtained for a given normalized separation determined by a required 1dB passband width. By using the present optimal design method, a flattened spectral response for an AWG is obtained. The optimal design result obtained from the present analytical formula is verified by a beam propagation method.

Paper Details

Date Published: 28 August 2002
PDF: 7 pages
Proc. SPIE 4904, Optical Fiber and Planar Waveguide Technology II, (28 August 2002); doi: 10.1117/12.481267
Show Author Affiliations
Daoxin Dai, Zhejiang Univ. (China)
Qincun Zhou, Zhejiang Univ. (China)
Sailing He, Zhejiang Univ. (China)
Jianjun He, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 4904:
Optical Fiber and Planar Waveguide Technology II
Shuisheng Jian; Steven Shen; Katsunari Okamoto, Editor(s)

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