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-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 0.65µs 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
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4230) Fiber optics and optical communications : Multiplexing
(070.1060) Fourier optics and signal processing : Acousto-optical signal processing
Nabeel A. Riza and Jian Chen, "Ultrahigh 47-dB optical drop rejection multiwavelength add--drop filter using spatial filtering and dual bulk acousto-optic tunable filters," Opt. Lett. 23, 945-947 (1998)