Abstract

This paper describes a silica-based 88 strictly nonblocking thermooptic matrix switch with a high-extinction ratio and low loss. We realized this matrix switch by using a configuration which combines a double Mach-Zehnder interferometer (MZI) switching unit and an NN matrix arrangement thus reducing the total waveguide length. The 88 matrix switch was fabricated on a 4-in wafer using planar lightwave circuit technology. We obtained an average extinction ratio of 60.3 dB and an average insertion loss of 5.1 dB. The operating wavelength bandwidth completely covers the gain band of practical erbium-doped fiber amplifiers (EDFA's).

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  1. R. Nagase, A. Himeno, M. Okuno, K. Kato, K. Yukimatsu, and M. Kawachi, "Silica-based 8 8 optical matrix switch module with hybrid integrated driving circuits and its system application," J. Lightwave Technol., vol. 12, pp. 1631-1639, Sept. 1994.
  2. K. Takada, A. Himeno, K. Kato, and M. Okuno, "Development of fiber-optic depolarizer and its application to measurement systems for polarization-insensitive operation of silica-waveguide matrix switches," J. Lightwave Technol., vol. 12, pp. 1640-1647, Sept. 1994.

J. Lightwave Technol. (2)

R. Nagase, A. Himeno, M. Okuno, K. Kato, K. Yukimatsu, and M. Kawachi, "Silica-based 8 8 optical matrix switch module with hybrid integrated driving circuits and its system application," J. Lightwave Technol., vol. 12, pp. 1631-1639, Sept. 1994.

K. Takada, A. Himeno, K. Kato, and M. Okuno, "Development of fiber-optic depolarizer and its application to measurement systems for polarization-insensitive operation of silica-waveguide matrix switches," J. Lightwave Technol., vol. 12, pp. 1640-1647, Sept. 1994.

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