R. Cush, N. Wood, P. T. Johnson, P. J. Duthie, C. Park, and B. T. Debney, "Performance assessment of an integrated optical image-rejection chip within a 622-Mbit/s CPFSK link,"
in Conference on Optical Fiber Communication/International Conference on Integrated Optics and Optical Fiber Communication,
Vol. 4 of 1993 OSA Technical Digest Series
(Optical Society of America, 1993), paper ThH4.