High-Precision Optical Filters for Sensing Applications
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Request a quoteTeraXion’s OF filters are made of state-of-the-art Fiber Bragg Gratings (FBGs) and backed by 20 years of proven high-precision FBG components. The OFs’ unique value proposition is based on unrivaled performance and cost-effectiveness.
The OF filters can be tailored for bandwidths as low as 2 GHz and centered between 700 nm up to 2100 nm with < 50 pm accuracy. They are offered in different packaging options, including the best-in-class athermal package that features < 0.5 pm/°C thermal drift. Multi-peak etalon filters with variable peak reflectivity can also be designed to fulfill specific requirements
TeraXion’s OF high-precision filters are ideal for amplified spontaneous emission (ASE) filtering, carrier suppression, side-band suppression, Brillouin isolation, Raman isolation, or any other optical sensing signal isolation requirement.
Their high reflectivity (as high as > 99.9 %) and flat-top, steep-edge shape provides precise isolation without affecting the sensing signal. Combined with a typically > 35 dB mean out-of-band isolation (which corresponds to the noise floor of our production metrology testing), these characteristics enable impressive signal to noise ratio (SNR) improvements.
TeraXion has also adapted its multi-peak FBG design platform, developed based on best practices from the telecom market, to offer etalon filters for optical sensing systems. Compared to Fabry-Perrot references, the ability to write specialized gratings offers more freedom in term of profiling, which allows for variations in peak reflectivity, for example.
Applications:
- Signal isolation and ASE filtering for distributed acoustic sensing (DAS) based on Rayleigh scattering
- Brillouin isolation and Raman isolation for distributed temperature sensing (DTS) as well as distributed temperature and strain (DTSS) sensing
- Wideband filtering for multi-point FBGs strain and temperature sensing
- Multi-peak etalon filters for swept-source laser monitoring
Top 6 Features
Narrow Bandwidth
The OF provides reflection bandwidths as narrow as 2 GHz.
Central Wavelength Accuracy
The OF is centered with < 50 pm accuracy.
Thermal Stability
The OF athermal packaging option provides < 0.5 pm/°C thermal drift.
High Optical Isolation
The OF mean out-of-band isolation typically reaches > 35 dB.
Flat-top Steep-edge
The typical OF has a flat-top and steep-edge spectrum for precision wavelength filtering.
Flexibility
The OF can be centered from 780 nm up to 2100 nm. Single-band or multi-peak profiles can also be designed.
Critical technical specifications
| Label | Value |
|---|---|
Central wavelength |
From 700 nm up to 2100 nm |
Bandwidth |
From 2 GHz up to thousands of GHz |
Central wavelength accuracy |
< 50 pm |
Max reflectivity |
> 99% typical |
Mean out-of-band isolation* |
> 35 dB typical |
Thermal stability (athermal package) |
< 0.5 pm/°C |
* Corresponds to the noise floor of the test and measurement instrumentation used in production.