Tunable Fiber Bragg Grating (TFBG)
Product description
Our tunable Fiber Bragg Gratings (TFBG) leverage a piezoelectric stack and electrical voltage to enable rapid and precise wavelength adjustments. Ideal for applications requiring swift, real-time tuning.
- Uniform FBG: A uniform FBG consists of a consistent grating period along the entire length of the fiber. This configuration reflects a single, narrow wavelength (depends of the FBG length), making it ideal for applications requiring precise wavelength selection.
- Chirped FBG: A chirped FBG has a varying grating period along its length, enabling it to reflect and/or filter a broader range of wavelengths. This configuration is useful for dispersion compensation in optical systems.
- FBG arrays: This configuration includes several gratings written on the same optical fiber. FBG arrays allow for multiple wavelength reflections in a single fiber, enabling complex multiplexing and sensing applications.
- Custom FBG: A custom FBG is tailored to specific requirements, allowing for unique grating patterns, periods, and lengths to be designed according to the application’s needs. This flexibility makes custom FBGs suitable for specialized tasks such as tailored filtering, precise wavelength discrimination, or specific sensing applications in challenging environments.
SPECIFICATION
| ELECTRICALLY TUNABLE FBG | |
| Wavelength range | From 1 µm to 1.6 µm |
| Tuning range | 1.2 nm / 100 V (piezo = 18 mm)
1.8 nm / 150 V (piezo = 17 mm) Depending on electrical voltage and piezo stack |
| Packaging dimensions | 45 x 7 x 10 mm |
| FBG profile | Uniform FBG, Chirped FBG, FBG Arrays |
| FBG length | Custom (1 – 20 mm) |
| Insertion loss | ≤ 0.1 dB |
| Fiber type | SM, PM, PCF, polyimide, custom |
| Pigtail buffer | 250µm, 900µm, 2.8mm |
| Max. voltage range | 150 V (typical), higher on demand |
| Optical connector | None, FC, LC, SC, SMA, ST, MU, E2000, other |
| Pigtail length | ≥ 0.5 m |
| Power handling | Up to 5 W (CW) |
| Calibration | No calibration needed |
| Operating temperature | -20°C to +70°C (typical), Higher on demand |
HOW IT WORKS?
A way to tune the optical wavelength (nanometer scale) of a photo-imprinted Fiber Bragg Grating is to fix it on a piezoelectric stack. When applying an electric voltage on the piezo, it creates an elongation of the FBG. Using electrical voltage to tune the optical wavelength over a small spectral range represents an innovative method. Indeed, the only voltage variation applied on the piezoelectric stack to modify the fiber grating wavelength provides great flexibility of use.
- Electrically tunable FBG
- Almost linear wavelength variation
- Temperature insensitive
- Low insertion loss
- High speed tuning for dynamic applications
- High tuning precision
- Ultra-compact packaging
- Custom FBG specifications
- Large choice of terminations
- Can be driven with general purpose electronics
- High reliability and repeatability
TEMPERATURE INSENSITIVE FBG
Fixing the grating on a piezoelectric stack makes the wavelength behavior insensitive to temperature. It makes it suitable for various applications such as fiber sensing systems, tunable fiber lasers, high power amplifiers, telecommunications systems and other custom applications where tuning of the FBG wavelength is needed.
- Optical sensors
- Tunable fiber lasers
- Ultrafast dynamics (dispersion compensation, gain flattening, add/drop)
- Spectrometers
- Laser diode stabilization
- Dense Wavelength Division Multiplexing (DWDM)
- All applications where tuning of the FBG wavelength is required
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