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  1. Home
  2. Optics
  3. Filters
  4. Bandpass Filters
  5. LLTF CONTRAST - Laser Line Tunable Filter

LLTF CONTRAST - Laser Line Tunable Filter

Photon etc.
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LLTF CONTRAST - Laser Line Tunable Filter

OVERVIEW

The 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 nm to 1000 nm (VIS) or 1000 nm to 2300 nm (SWIR), with bandwidths (FWHM) of <2.5 nm and <5 nm respectively. Custom and extended spectral ranges (up to 2500 nm) 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).


For more details on our plug and play filter watch this video.


We offer the following models of Laser Line Tunable Filters:


CONTRAST-SR-VIS
Spectral Range: 400-1000 nm
Bandwidth: < 2.5 nm


CONTRAST-SR-SWIR
Spectral Range: 1000-2300 nm (2500 nm optional)
Bandwidth: < 5.0 nm


CONTRAST-EXT IV
Spectral Range: 400-2300 nm (2500 nm optional)
Bandwidth: 400-1000 nm, < 2.5 nm 1000-2300 nm, < 5.0 nm


CONTRAST-X
Spectral Range: Custom
Bandwidth: 0.15 - 0.9 nm


 

SPECIFICATION

  • Central Wavelength: 1350 nm
  • Bandwidth (FWHM): <2 or <5 nm
  • Peak Transmittance: 65 %
  • Initial Wavelength: 400 nm
  • Final Wavelength: 2300 nm
  • Maximum Input Power: 20 W
  • Input Beam Diameter: 5 mm
  • Input Beam Divergence Requirement: <1 mrad
  • Optical Density (OD): > OD6 (measured at 1064 nm) 
  • Dimensions (L X W X H): 9 x 6.3 x 6.7 (inches), 23 x 16 x 17 (cm) 
Download Data Sheet

Applications

-  Detector and Instrument Calibration
-  Photoluminescence
-  Reflection/Absorption Spectroscopy
-  Steady-State Pump-Probe Experiments
-  Hyperspectral Imaging

KEY FEATURES

LLTF Contrast series Laser Line Tunable Filters feature the following key attributes


-  Fiber optic input/output
-  Harmonic filter
-  Background supressor
-  Alignment kit (for free space)


See attached Datasheet for more details on the accessories and options.

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3790 El Camino Real, #538, Palo Alto, CA 94306 USA
FindLight
3790 El Camino Real, #538,
Palo Alto , CA , 94306 USA

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