Pro Lite Technology

Tunable Filters & Sources

Photon etc Tunable Filter

Photon etc's Laser Line Tunable Filter (LLTF) is a non-dispersive tunable bandpass filter based on volume holographic gratings. It delivers the highest signal throughput in the industry, and is also unique in that it combines very high optical density (> OD6) and outstanding out-of-band rejection with wide tunability. A single filter can be tuned from 400 to 1000nm (VIS) or 1000 to 2300nm (SWIR), with bandwidths (FWHM) of <2.5 nm and <5 nm respectively. Custom and extended spectral ranges (up to 2500nm) and bandwidths (sub-nm) are also available. Photon etc’s LLTF can be coupled with a supercontinuum laser to provide a Tunable Laser Source (TLS); the LLTF is compatible with any VIS-NIR broadband source, but is optimised for Fianium's, NKT Photonics' and Leukos' supercontinuum sources.

Laser Line Tunable Filter (LLTF Contrast)

The incomparable efficiency and out-of-band rejection offered by Photon etc's unique optical filtering technology are ideal for tunable excitation sources used in fluorescence and Raman spectroscopy. The LLTF is available in three versions: the Contrast VIS (400-1000nm); the Contrast SWIR (1000-2300nm); and the Contrast X (custom spectral range). » Datasheet
 
KEY CHARACTERISTICS:

  • Efficiency up to 60%
  • High out-of-band rejection
  • Wide tuning range
  • Free-space or fiber coupled
  • User-friendly control software
  • Up to 20W input power

Tunable Laser Source (TLS)

Photon etc's turn-key sources unite the flexibility of Fianium, NKT Photonics and Leukos supercontinuum technologies to the incomparable out-of-band rejection of their optical filters, allowing easy and precise sample excitation or instrument calibration. » Datasheet
 
KEY CHARACTERISTICS:

  • High out-of-band rejection
  • Pointing and power stability
  • Wide tuning range
  • Free-space or fiber coupled
  • Pico- or nanosecond sources
  • Up to 20W input power
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Knowledge Base

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The out-of-band rejection and the optical density (OD) are two critical specifications of tunable filters. Unfortunately these properties are often misinterpreted and their definitions tend to differ from one manufacturer to another. In this white paper, clear and rigorous definitions of the out-of-band rejection and the OD of widely tunable filters are presented, and the steps and instrumentation needed to accurately measure those specifications are exposed.

> Download White Paper

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   publications relevant to the
   LLTF

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