Product Aliases: Laser FBG (Fiber Bragg Grating), Fiber Laser Grating, Laser Cavity Grating, Optical Fiber Mirror, Double Clad FBG (DC-FBG), PM FBG (Polarization Maintaining FBG), 1064nm FBG / 1080nm FBG, High Reflector FBG (HR FBG), Output Coupler FBG (OC FBG), Fiber Laser Resonator Mirrors, FBG Pair for Fiber Laser, Matched FBG Pair
1. Product Introduction (Description)
The OFSCN® Laser Fiber Bragg Grating is a high-performance optical component specifically designed for the resonator cavities of fiber lasers. The product uses high-quality optical fiber as the transmission medium, utilizing advanced UV Laser Phase Mask Inscription Technology to form a precise, modulated refractive index structure within the fiber core.
Acting as the core reflective element ("mirror") of the fiber laser, the OFSCN® Laser FBG enables highly efficient reflection of light at a specific wavelength. Through precise control of the inscription process, we offer extremely high wavelength matching and flexible reflectivity configurations, thereby meeting the stringent operating conditions of various power and type fiber laser cavities and ensuring laser output stability and efficiency.
2. Key Features
- Resonator Optimized Design: Specifically optimized for fiber lasers, providing matched pairs of High Reflector (HR) and Output Coupler (OC) gratings.
- Precise Wavelength Control: Wavelength tolerance controlled within ±0.5 nm; HR/OC grating pair wavelength matching better than 0.2 nm.
- Diverse Fiber Options: Supports Passive Double Clad Fiber (Passive DCF), Polarization Maintaining Fiber (PM Fiber), and custom fiber types.
- Flexible Reflectivity: HR reflectivity >99.5%; OC reflectivity precisely adjustable from 1% to 90%
- Excellent Environmental Robustness: Optional Polyimide coating or specialized metal packaging for high-temperature and harsh environment applications.
- Multiple Grating Profiles: Offers Uniform Grating (for narrow linewidth/CW light) and Chirped Grating (for pulse/broadband applications).
3. Technical Specifications
|
Parameter |
Unit |
Value/Range |
Notes |
|
Center Wavelength |
nm |
1064, 1080 |
Common for Ytterbium-doped Fiber Lasers |
|
nm |
1510 ~ 1590 |
Common for Erbium-doped / Telecom band |
|
|
Grating Profile |
- |
Uniform Grating / Chirped Grating |
|
|
Wavelength Tolerance |
nm |
±0.5 |
|
|
Wavelength Matching |
nm |
< 0.2 |
Difference between HR and OC center wavelengths |
|
Reflectivity - HR |
% |
> 99.5% |
High Reflector |
|
Reflectivity - OC |
% |
1% sim 90% |
Output Coupler, customizable |
|
3dB Bandwidth - HR |
nm |
0.2 sim 2.5 |
Depends on grating length and design |
|
3dB Bandwidth - OC |
nm |
0.1 sim 2.0 |
Typically narrower than HR bandwidth |
|
Grating Length |
mm |
1 sim 30 |
Customizable |
|
Fiber Type |
- |
Passive DCF PM Fiber Custom Fiber |
Please specify upon ordering |
|
Coating Material |
- |
Polyacrylate Polyimide |
Standard Temp (Default) High Temp (Optional) |
|
Connector Type |
- |
FC/APC (Default) |
Customizable (FC/UPC, SC, SMA905, etc.) |
|
Packaging |
- |
Bare Grating (Default) Seamless Steel Tube / Polymer Material |
Recoating or tube packaging available |
4. Applications
- Fiber Laser Resonator Cavities: Used as cavity mirrors to construct all-fiber lasers.
- High Power Laser Systems: Double-clad gratings for high-power pump coupling.
- Ultrafast Lasers: Chirped gratings used for pulse management (stretching/compression).
- Laser Wavelength Stabilization: Used for stabilizing the wavelength of semiconductor lasers.