W. Lin, C. D. Lee, Y. J. Chen, and D. R. Stone, "Performance and uniformity of phased-array waveguide grating WDMs with wavelength comb self-alignmentss connect,"
in Conference on Lasers and Electro-Optics, D. Killinger, G. Valley, C. Chang-Hasnain, and W. Knox, eds.,
Vol. 11 of OSA Technical Digest
(Optical Society of America, 1997), paper CWC4.