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Proceedings Paper

Design of a flat-field arrayed waveguide grating
Author(s): Yaocheng Shi; Daoxin Dai; Qincun Zhou; Sailing He
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Paper Abstract

A curved image plane is usually used in a conventional Rowland-type AWG. For some applications (e.g., sensing), a straight image plane is desirable so that the output field at the image plane can be received directly with a detector-array. If one simply chooses a flat output plane (instead of a circular output curve) without optimization for a conventional AWG of Rowland circle type, some considerable aberrations will be introduced, which degrade the performances of the AWG. The aberrations are calculated and analyzed with an optical path function. A three-stigmatic-point method is used to optimize the design of an AWG with a straight image plane and minimize the aberrations. In this design, the aberrations at three special wavelengths are removed. The first order aberrations at all wavelengths are also eliminated. An 80-channel flat-field AWG is designed as an example. The results show that the aberrations are reduced greatly and a good spectral response with tolerated side-lodes is obtained.

Paper Details

Date Published: 17 January 2005
PDF: 8 pages
Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.566869
Show Author Affiliations
Yaocheng Shi, Royal Institute of Technology (Sweden)
Zhejiang Univ. (China)
Daoxin Dai, Royal Institute of Technology (Sweden)
Zhejiang Univ. (China)
Qincun Zhou, Royal Institute of Technology (Sweden)
Zhejiang Univ. (China)
Sailing He, Royal Institute of Technology (Sweden)
Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 5644:
Optoelectronic Devices and Integration
Hai Ming; Xuping Zhang; Maggie Yihong Chen, Editor(s)

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