Unique SuperK VARIA filter from NKT Photonics turns supercontinuum sources into ultra tunable high-power lasers

NKT Photonics launches the SuperK VARIA – the world’s first computer-controlled variable bandwidth filter of its type, empowering the SuperK supercontinuum lasers for applications in fluorescence lifetime imaging, flow cytometry, inspection, and many others.

The unique SuperK VARIA is a cost-effective and flexible alternative to a monochromator, effectively turning the SuperK supercontinuum white light source into a powerful single-line laser with a 450 nm tuning range and variable bandwidth. The center wavelength of the pass band can be tuned anywhere between 400 and 850 nm and the bandwidth is variable between 2 and 100 nm, making the SuperK VARIA the most flexible filter solution on the market. Increasing the filter’s bandwidth has the added advantages of higher power throughput and reduced speckle in imaging applications. Moreover, high out-of-band suppression of up to 50dB makes the SuperK VARIA an ideal tool for FLIM and other applications using high-sensitivity detectors.

The SuperK VARIA is designed to be used with the SuperK supercontinuum sources. 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 one single fiber.

400 – 850 nm wideband coverage highlights:

  • 2 – 100 nm variable bandwidth, for higher power and reduced speckle
  • Up to 50 dB suppression of out-of-band light
  • Highest transmission (no polarization loss)
  • Handles high average power
  • Single-mode fiber delivery over the entire tuning range
  • Available with active output power stabilization
  • Fully computer controlled – plug & play