Abstract

Arrayed waveguide grating (AWG) phase errors are normally assessed from the Fourier transform of the interference intensity data in the frequency domain method. However it is possible to identify the phases directly from the intensity data if one adopts a trial-and-error method. Since the functional form of the intensity profile is known, the intensities can be calculated theoretically by assuming arbitrary phase errors. Then we decide the phases that give the best fit to the experimental data. We verified this method by a simulation. We calculated the intensities for an artificial AWG which is given arbitrary phases and amplitudes. Then we extracted the phases and amplitudes from the intensity data by using our trial-and-error method. The extracted values are in good agreement with the originally given values. This approach yields better results than the analysis using Fourier transforms.

© 2012 Optical Society of Korea

Phase-modulation method for AWG phase-error measurement in the frequency domain

Kazumasa Takada and Tomohiro Hirose
Opt. Lett. 34(24) 3914-3916 (2009)

Maclaurin-series method for calculating dispersion in arrayed-waveguide grating multiplexers

Tomohiro Hirose and Kazumasa Takada
Appl. Opt. 49(5) 904-909 (2010)

Simple phase retrieval method based on two intensity measurements on a single plane

Junhe Zhou and Haoqian Pu
Appl. Opt. 60(31) 9975-9980 (2021)

Method for measuring the phase error distribution of a wideband arrayed waveguide grating in the frequency domain

Kazumasa Takada and Shin-ichi Satoh
Opt. Lett. 31(3) 323-325 (2006)

Even aberration measurement of lithographic projection optics based on intensity difference of adjacent peaks in alternating phase-shifting mask image

Bo Peng, Xiangzhao Wang, Zicheng Qiu, Yuting Cao, and Lifeng Duan
Appl. Opt. 49(15) 2753-2760 (2010)