Abstract

A new high-speed, ultrahigh cross-talk-suppression multiwavelength add–drop optical filter structure is demonstrated with two bulk acousto-optic tunable filters. With simple spatial blocks, an average $-47‐\mathrm{dB}$ optical suppression is measured for the unwanted wavelengths at the filter output ports. The filter is tested for the three standard visible wavelengths, red, green, and blue, and demonstrates a switching time of $0.65 \mathit{\mu }\mathrm{s}$ and an average optical loss of 5 dB. Applications for this filter include multiwavelength switching applications such as wavelength-division-multiplexed optical communications.

© 1998 Optical Society of America

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