PLC-based optical add/drop switch with automatic level control

doi:10.1109/50.809678

PLC-based optical add/drop switch with automatic level control

1999-01-01

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DOI：10.1109/50.809678

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Abstract

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A novel switch configuration for an optical add/drop multiplexer is proposed. By utilizing a certain Mach-Zehnder interferometer both as a component of a double-gate switch and as a level equalizer, we reduced the number of Mach-Zehnder interferometers from five in a conventional switch configuration to three. The add/drop switch simultaneously provides high-isolation snitching and polarization-independent automatic level control, The use of planar lightwave circuit (PLC)technology enables this switch to be fabricated with three thermooptic switches (TOSW's) and a monitor tap. High isolation of more than 44 dB and automatic level control accuracy of better than 0.3 dB are achieved. Bit error rate (BER) measurements confirmed snitch's usability in the optical add/drop multiplexer.

Keywords:

add/drop switch

automatic level control

in-band crosstalk

Mach-Zehndcr interferometer

optical add/drop multiplexer

planar lightwave circuit (PLC)

thermooptic switch (TOSW)

PLC-based optical add/drop switch with automatic level control

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