Poly
Who Needs FWS-Poly ?
For users who need precise spectral control in compact, flexible systems.
1. Build a tunable light source from white light
- Select wavelengths in 1 nm steps
- Replace AOTFs, monochromators, or LLTFs with software control
- Use safely with femtosecond or high-power lasers
2. Enable precise imaging or analysis
- Create a hyperspectral imaging system
- Analyze specific wavelengths with high accuracy
- Adjust bandwidth dynamically for various conditions
Any λ (lamda) any Δλ (delta lamda)
FWS Poly: Unrivaled Performance, Unmatched Flexibility in Tunable Bandpass Filters
Discover the FWS Poly Flexible Wavelength Selector, the leading tunable bandpass filter powered by cutting-edge TwinFilm™ technology.
Experience unparalleled software control via USB, offering simultaneous and precise adjustment of both center wavelength and bandwidth.
What truly sets the FWS Poly apart is its unique ability to uniformly adjust bandwidth across all wavelengths—a feature unmatched by any other filter on the market.
With a broad spectral range of 255-1700 nm and a high laser damage threshold of <2 MW/cm² CW, the FWS Poly delivers exceptional performance.
Benefit from high throughput (>75% transmission efficiency), versatile aperture sizes (5 mm or 10 mm), and superb out-of-band blocking (OD 10 up to 1700 nm).
Crucially, the FWS Poly preserves your input beam's characteristics, ensuring no distortion and complete polarization independence—a significant advantage over traditional methods that can alter beam shape.
| Product |  |
 |
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| Model | Poly-RED-A5 | Poly-RED-A10 | Poly-BLUE-A5 | Poly-BLUE-A10 |
| Spectral range (nm)1) | 255-1700 nm | |||
| Bandwidth (FWHM) (nm) (nominal)2) | max: 2-15 nm / min: 7-13 nm | 10 nm or 20 nm (fixed) | ||
| Aperture size (mm) | 5 mm | 10 mm | 5 mm | 10 mm |
| 5mm : Suitable for supercontinuum lasers | ||||
| 10mm : Suitable for light sources with large beam size(tungsten-halogen, plasma, LED) | ||||
| Out of band Blocking | OD 10 up to 1700 nm3) | |||
| Step size of center wavelength & Bandwidth (nm) | 1 nm | |||
| Damage threshold | Pulse : Peak Fluence < 1.75 joules/cm (~70 um spot diam., 10 ns, 10 Hz, 532 nm LASER) | |||
| CW (Continuous wave) : Intensity < 2 MW/cm (1064 nm, ~ 90 m spot diam.) | ||||
| Transmission efficiency (%) (nominal) | > 75 % (avg.)4) | |||
| Scanning speed (ms) | 30 - 300 ms (depending on step size)5) | |||
| Software | FWS-Auto ver 4.2 | |||
| Dimension (L x W x H, mm) | 186 mm x 124 mm x 214 mm | 137 mm x 124 mm x 214 mm | ||
| Electric requirement | AC 100 - 240 V, 50/60 Hz | |||
| Power supply | DC 12 V, 5 A | |||
| Data interface | USB 2.0 | |||
| Weight (kg) | 4.2 kg | 3.15 kg | ||
1) Specified center wavelength (CWL) tolerance for Poly-RED and Poly-BLUE: ±1 nm.
2) Specified full width at half maximum (FWHM) tolerance: ±1 nm for Poly-RED, ±2.5 nm for Poly-BLUE.
3) OD 7 up to 600 nm for F00-F02 filters; for blocking beyond this range, dedicated out-of-band blockers such as WS-BL400UV and WS-BL1700SWIR are available..
4) Transmission efficiency values are based on filters with a 10 nm full width at half maximum (FWHM). At wavelengths below 400 nm, efficiency remains ≥50%.
5) Scanning speed represents time required for a single wavelength-to-wavelength transition, depending on step size.
The main difference between the Poly-RED and Poly-BLUE lies in how the bandwidth can be adjusted. The available tuning range for each selected wavelength is as follows:
* Poly-UV model/F00,F01,F02 Model can block up to 600 nm.
* For the optimal performance of the FWS, the incident light should be collimated.
* Do not use the product on its side or upside down. It must stay upright with the base fully in contact with the floor.
This data shows the tunability of CWL and FWHM.
Once the wavelength, FWHM, and time delay are set, the system accurately outputs the configured wavelength.
Flexible Wavelength Selector (FWS) Comparison
Application
| Main Category | Sub-Application Area |
| Basic Scientific Research (Physics, Chemistry, Optics, etc.) | General Optical Experimentation & Photo Detection |
| Precision Spectral Measurements with Broadband Sources | |
| Laser-Based Systems | |
| Adaptive Optics & High-Precision Optical Metrology (e.g., Segmented Mirror Piston Sensing) | |
| Holographic & Interferometric Measurements | |
| Quantum Computing & Quantum Optics | |
| Life Sciences & Biotechnology | Fluorescence Imaging & Microscopy |
| Laser Scanning Confocal Microscopy | |
| Cell Analysis, Drug Discovery & Screening | |
| Optogenetics | |
| Bio-inspired Photoreceptor Research & Artificial Visual Systems | |
| Materials Science & Advanced Materials Research | Photoluminescence (PL) & Spectroscopy |
| Nearfield Optics & Advanced Optical Phenomena (e.g., Magnetic Light-Matter Interactions) | |
| Supercontinuum Laser-based Spectral Measurements | |
| Thin Film & Nanomaterial Analysis | |
| Industrial Metrology & Quality Control / Sensor Calibration | High-Precision Sensor Calibration & Photo Detection Systems |
| Display & Camera Testing | |
| Optical Component Characterization | |
| Medical Diagnostics & Environmental Analysis | Non-invasive Medical Imaging |
| Water & Air Quality Monitoring | |
| Hyperspectral Imaging | - |
| Energy & Photovoltaics | Solar Cell Spectral Responsivity Testing |
Input and Output Linkers
Various accessories for the FWS including input and output linkers, extender and mounting bases.
