LLTF CONTRAST – Precision Tunable Filtering for Supercontinuum Sources
Discover the LLTF CONTRAST – a high-precision, tunable bandpass filter for supercontinuum lasers. Offering OD6+ out-of-band rejection, wide spectral coverage (400–2500 nm), and effortless integration for advanced spectroscopy applications.
Description
The Laser Line Tunable Filter (LLTF CONTRAST) is a high-performance, non-dispersive tunable bandpass filter built on volume Bragg grating technology. When paired with a supercontinuum white light laser, it transforms into a powerful wavelength selector—delivering a continuously tunable light source.
Engineered for precision, the LLTF CONTRAST offers:
- Exceptional out-of-band rejection exceeding OD6
- Broad spectral coverage across the visible (VIS), near-infrared (NIR), and short-wave infrared (SWIR) ranges
- Customizable tuning from 400 nm to 2500 nm with high wavelength resolution
The LLTF CONTRAST is fully compatible with all supercontinuum lasers from YSL Photonics, Leukos, NKT Photonics, and Fianium, ensuring seamless integration into your existing optical setup.
Designed for ease of use, it requires no alignment or adjustment, making it ideal for advanced spectroscopic applications such as:
- Photoluminescence excitation (PLE)
- Photoluminescence (PL)
- Raman spectroscopy
Key Features
- Out-of-band rejection > OD6
- Wide tuning range across VIS, NIR, and SWIR
- Efficiency up to 60%
- Free-space or fiber-coupled configurations
- Quick and simple 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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