Design of a flat-field arrayed waveguide grating

Yaocheng Shi; Daoxin Dai; Qincun Zhou; Sailing He

doi:10.1117/12.566869

17 January 2005 Design of a flat-field arrayed waveguide grating

Yaocheng Shi, Daoxin Dai, Qincun Zhou, Sailing He

Proceedings Volume 5644, Optoelectronic Devices and Integration; (2005) https://doi.org/10.1117/12.566869
Event: Photonics Asia, 2004, Beijing, China

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.

Citation Download Citation

Yaocheng Shi, Daoxin Dai, Qincun Zhou, and Sailing He "Design of a flat-field arrayed waveguide grating", Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); https://doi.org/10.1117/12.566869

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KEYWORDS

Waveguides

Optical design

Sensors

Diffraction

Multiplexing

Dense wavelength division multiplexing

Dispersion

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