Product Aliases: Chirped FBG, Chirped Fiber Bragg Grating (CFBG), Broadband FBG, Dispersion Compensation Grating, Linearly Chirped FBG, Pulse Compression Grating, Pulse Stretching Grating, Chromatic Dispersion Compensation FBG, Polyimide Chirped FBG, Wide Bandwidth Fiber Grating
1. Product Description
The OFSCN® Chirped Fiber Bragg Grating (CFBG) is an optical passive component fabricated using UV Phase Mask technology. It involves writing a periodic refractive index modulation structure into the core of a photosensitive fiber. Unlike standard uniform FBGs, the grating period (pitch) of a CFBG varies along the fiber axis, either linearly or non-linearly.
This unique structure provides the OFSCN® CFBG with a wide spectral reflection characteristic and specific Group Delay Dispersion properties. The product is widely used for dispersion compensation in optical communication, pulse stretching and compression in high-power fiber lasers, and in distributed/wideband fiber sensing applications. We offer highly customized services to optimize grating parameters based on the customer's specific application (e.g., sensing, telecommunications, or laser systems).
2. Key Features
- High-Precision Manufacturing: Fabricated using mature UV Phase Mask inscription technology, ensuring excellent spectral consistency.
- Broad Bandwidth Capability: Typical bandwidth of 16nm, with support for deep customization.
- High Reflectivity: Typical reflectivity is greater than 90%, effectively ensuring signal strength.
- Flexible Fiber Options:
- Polyacrylate Coating: Suitable for standard temperature environments, offering high cost-performance.
- Polyimide Coating: Suitable for high-temperature (up to 300℃) or harsh environments, offering high mechanical strength and a thinner coating.
- Environmental Adaptability: Standard version meets industrial temperature ranges; High-Temperature version supports up to 300℃.
3. Technical Specifications
The table below outlines the standard parameters and customization range for the OFSCN® Chirped FBG:
|
Parameter |
Unit |
Typical Value |
Description/Customization Range |
|
Center Wavelength |
nm |
1550 |
Standard Range: 1525 ~ 1565 nm Extended Range: 1510 ~ 1590 nm |
|
Reflectivity |
% |
> 90% |
Customizable reflectivity levels based on requirement |
|
3dB Bandwidth |
nm |
16 |
Customizable (depends on chirp rate and grating length) |
|
Grating Length |
mm |
10 |
Customizable from 5mm to 20mm |
|
Fiber Type |
- |
SMF-28e |
Polyacrylate Coating (Default) Polyimide Coating (High-Temperature Option) |
|
Operating Temp. |
℃ |
-20 ~ +85 |
Standard Temp. Version (Polyacrylate) |
|
℃ |
-20 ~ +300 |
High-Temp. Version (Polyimide) |
|
|
Connector Type |
- |
FC/APC |
Options include FC/UPC, SC, LC, or bare fiber |
|
Pigtail Length |
m |
1.0 |
Customizable length on both ends (e.g., 0.5m, 1m, 3m) |
|
Optional Packaging |
- |
Stainless Steel Tube / Polymer Material |
Default is bare or minimal protection; specialized packaging materials are customizable |
4. Applications
When ordering the OFSCN® Chirped Fiber Bragg Grating, please specify the intended application so we can match the optimal grating design solution:
- Telecommunications: Used for Chromatic Dispersion Compensation in long-haul transmission systems.
- Fiber Lasers: Used for pulse stretching and compression in Chirped Pulse Amplification (CPA) systems.
- Fiber Sensing:
- Utilizing the broad spectral response for wide-range demodulation.
- Using temperature and strain sensitivity for distributed measurement.