17 January 2005 Design of a flat-field arrayed waveguide grating
Author Affiliations +
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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yaocheng Shi, Yaocheng Shi, Daoxin Dai, Daoxin Dai, Qincun Zhou, Qincun Zhou, Sailing He, Sailing He, "Design of a flat-field arrayed waveguide grating", Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.566869; https://doi.org/10.1117/12.566869
PROCEEDINGS
8 PAGES


SHARE
Back to Top