LLTF CONTRAST™ the ultimate SUPERCONTINUUM Filter
The Laser Line Tunable Filter (LLTF CONTRAST) is a non-dispersive tunable bandpass filter based on volume Bragg gratings. Once coupled to a supercontinuum white laser, it acts as a wavelength selector to produce a continuously tunable source.
It combines outstanding out-of-band rejection with an optical density higher than OD6 and a wideband tuning range across the visible (VIS) and infrared (NIR, SWIR) spectra. This supercontinuum filter can be customized to cover the entire 400 nm to 2500 nm spectral range with high resolution in wavelength.
Moreover, the LLTF CONTRAST requires no alignment or adjustment to unlock its potential for advanced spectroscopic techniques, including photoluminescence excitation (PLE), photoluminescence (PL), and Raman spectroscopy, enabling precise and insightful analyses.
Description
The Laser Line Tunable Filter (LLTF CONTRAST) is a non-dispersive tunable bandpass filter based on volume Bragg gratings. Once coupled to a supercontinuum white laser, it acts as a wavelength selector to produce a continuously tunable source.
It combines outstanding out-of-band rejection with an optical density higher than OD6 and a wideband tuning range across the visible (VIS) and infrared (NIR, SWIR) spectra. This supercontinuum filter can be customized to cover the entire 400 nm to 2500 nm spectral range with high resolution in wavelength.
Moreover, the LLTF CONTRAST requires no alignment or adjustment to unlock its potential for advanced spectroscopic techniques, including photoluminescence excitation (PLE), photoluminescence (PL), and Raman spectroscopy, enabling precise and insightful analyses.
Key Features
- Out-of-band rejection higher than OD 6
- Wide tuning range
- Efficiency up to 60%
- Free-space or fiber-coupled
- Easy and fast installation
- Intuitive control software
Specifications
Technical Specifications
| CONTRAST-SR-VIS | CONTRAST-SR-SWIR | CONTRAST-EXT III | CONTRAST-EXT IV | |
|---|---|---|---|---|
| Spectral range | 400-1000 nm | 1000-2300 nm (2500 nm optional) | 400-1700 nm | 400-2300 nm (2500 nm optional) |
| Bandwidth (FWHM) | 1.5 – 2.5 nm | 2.0 – 5.0 nm | 400-1000 nm: 1.5 – 2.5 nm | 1000-1700 nm: 2.0 – 5.0 nm | 400-1000 nm: 1.5 – 2.5 nm | 1000-2300 nm: 2.0 – 5.0 nm |
| Out-of-band rejection | <-60 dB@±40 nm, typically <-30 dB@±10 nm | <-60 dB@±80 nm, typically <-30 dB@±20 nm | 400-1000 nm: <-60 dB@±40 nm, typically <-30dB@±10 nm | 1000-1700 nm: <-60dB@±80 nm, typically <-30 dB@±20 nm | 400-1000 nm: <-60 dB@±40 nm, typically <-30dB@±10 nm | 1000-2300 nm: <-60dB@±80 nm, typically <-30 dB@±20 nm |
| Peak efficiency | Typically around 65% | Typically around 65% | Typically around 65% | Typically around 65% |
| Optical density (OD) | > OD6 (measured at 1064 nm) | > OD6 (measured at 1064 nm) | > OD6 (measured at 1064 nm) | > OD6 (measured at 1064 nm) |
| Stabilization time/wavelength step | 20 ms for 1 nm steps / 50 ms for 10 nm steps | 20 ms for 1 nm steps / 50 ms for 10 nm steps | 20 ms for 1 nm steps / 50 ms for 10 nm steps | 20 ms for 1 nm steps / 50 ms for 10 nm steps |
| Dimensions (L x W x H) | 9 x 6.3 x 6.7 (inches), 23 x 16 x 17 (cm) | 9 x 6.3 x 6.7 (inches), 23 x 16 x 17 (cm) | 9 x 6.3 x 6.7 (inches), 23 x 16 x 17 (cm) | 11.8 x 9.1 x 6.7 (inches), 30 x 23 x 17.4 (cm) |
| CONTRAST-X | |
| Spectral range | X represents a custom spectral range: up to 5 gratings |
| Bandwidth (FWHM) | 0.15 – 0.9 nm |
| Out-of-band rejection | Typically -55 dB @± -5 nm |
| Peak efficiency | Typically around 65% |
| Optical density (OD) | Depends on spectral range |
| Stabilization time / wavelength step | 20 ms for 1 nm steps / 50 ms for 10 nm steps |
| Dimensions (L x W x H) | 9 x 6.3 x 6.7 (inches), 23 x 16 x 17 (cm) |
| Options & Accessories | |
| Fibered output | An X-Y-Z translation adjustment allows coupling optimization. FCAPC standard connector (SMA, FCPC on demand). Both lens and mirror based-models available |
| Harmonic filter | Upon request |
| Alignement kit | In free space configuration (input/output), the alignment kit allows the user to rapidly find the correct alignment. |
unboxing
UnBoxing
Documentation
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