Motorized tunable filters
Motorized tunable filters are TTL-driven components that tune the center wavelength of a narrow bandpass filter over a 30-nm range. They select among wavelength channels at the receiver side of dense WDM systems and are used for tuning the center wavelength of incoherent sources, such as white light or LEDs, in laboratory tests and measurement systems. The filters use angle tuning of a multilayer, thin filter to achieve 0.1-nm repeatability. Filters with 0.5-dB bandwidths ranging from 0.3 to 20 nm are available, as are custom filters with two, three and five cavities. Insertion loss is 1.5 dB typical and 2.5 dB maximum. Base price is approximately $2000. A software developer`s kit that complements the motorized filters is available upon request. The software supports DOS-C and Windows Labview and controls the device through a PC printer port. To meet the demand for active tuning of multiple wavelength channels in dense WDM systems, eight motorized tunable filters are available in a single housing with GPIB, RS-232 and manual push-button control options.
Dicon Fiberoptics Inc.
Berkeley, CA