Free-space-based channelized dynamic spectral equalizers are theoretically investigated by solving the temporal-frequency-dependent power-coupling integral for commonly used active device technologies: liquid-crystal modulators, tilting micromirror arrays, and deformable gratings. Channel-filter characteristics, such as bandwidth and interchannel transition, are found to depend on the different attenuation mechanisms provided by the active devices. Such information is required for choosing the proper device parameters in designing channel equalizers and similar free-space spatially dispersed subsystems.
© 2004 Optical Society of America
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(070.6110) Fourier optics and signal processing : Spatial filtering
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.6120) Optical devices : Spatial light modulators
Sang-Hyun Oh and Dan M. Marom, "Attenuation Mechanism Effect on Filter Shape in Channelized Dynamic Spectral Equalizers," Appl. Opt. 43, 127-131 (2004)