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Variable-Bandwidth Filter

Photonics.com
Jul 2011
NKT Photonics A/SRequest Info
 
BIRKERØD, Denmark, July 28, 2011 — The SuperK Varia manufactured by NKT Photonics A/S is a computer-controlled variable-bandwidth filter that effectively turns a supercontinuum white light source into a powerful single-line laser. Designed for use with the company’s range of SuperK supercontinuum white light sources, it is a cost-effective and flexible alternative to a monochromator.

The system offers a tunable center wavelength in the 400- to 850-nm range and a variable bandwidth between 4 and 100 nm. In contrast to acousto-optic tunable filter technology, it suffers no polarization loss and delivers high power throughput. Powers of >50 mW per wavelength across the full visible spectrum are achieved with the SuperK Varia and the SuperK Extreme EXW-12, using only a 10-nm bandwidth. Use the collimated free-space output from the filter directly, or combine the Varia with the SuperK Connect broadband fiber delivery system for pristine single-mode fiber delivery over the entire tuning range in a single fiber.

The system is computer-controlled through the SuperKontrol graphical user interface, and the optical output can be a free-space collimated beam as standard or single-mode fiber delivery via the SuperK Fiber Delivery range. It is not restricted to use with the SuperK systems but can also be used with traditional laser systems or broadband light sources as a variable-bandwidth filter. For applications that require a single tunable channel with high power and/or variable bandwidth, it is a viable alternative to acousto-optic tunable filter-based systems.


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GLOSSARY
single-line laser
A laser whose output is limited to a single wavelength.
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