Fiber Bragg Grating Solutions for Fiber Optics

Ascentta Fiber Bragg Grating (FBG) Sensor

Ascentta Fiber Bragg Grating (FBG) Sensor

$195.00
Sold by: Ascentta Ships from: United States
Specifications
Center Wavelength Range: 1510 – 1590 nm
FBG Length: Custom
Reflectivity: 3 - 90%, >1%, 30 - 99%
Wavelength: 1510~1590 nm (Customizable)
Wavelength Deviation: ±0.5 nm
Fiber Bragg Gratings For Lasers

Fiber Bragg Gratings For Lasers

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Sold by: DK Photonics Ships from: China
Specifications
Center Wavelength Range: 1018 – 2040 nm
FBG Length: Not Specified
Reflectivity: 30 - 99%
Center Wavelength (nm): 1018nm, 1053nm, 1064nm, 1080nm, 1550nm, 1950nm, 2020nm, 2040nm
Wavelength Accuracy: 0.2nm

Did You Know?

The word “grating” in optics usually refers to a component that has a periodic structure such as an array of ridges or dips that causes the light to diffract, reflect or transmit. A fiber Bragg grating or FBG for short is an optical fiber whose core contains a grating or a periodic variation of the effective refractive index over a short length. The periodic structures applied to the core of the optical fibers are typically a few millimeters or centimeters long with a period that is on the order of a wavelength or hundreds of nanometers. The periodic pattern is produced by exposing the core of the fiber to intense pulses of lasers. Because of the periodic change of the refractive index down to the length of the grating, wavelengths satisfying the Bragg condition will be back-reflected while other wavelengths are transmitted through the fiber. As a result, these fiber gratings can be used as filters that block certain bandwidths of light. The filtering properties of fiber Bragg gratings are widely used in different telecom applications such as wavelength division multiplexing. Fiber Bragg gratings are also used in sensing applications such as temperature and pressure sensing.

Related Resources

Frequently Asked Questions

Sir William Lawrence Bragg is a physicist who proposed a diffraction law for x-rays which was later generalized for all wavelengths. His name was attributed to this law in which he explained the interference of waves reflecting at two planes separated by a short distance.

What is a Fiber Bragg Grating?

A Fiber Bragg Grating (FBG) is a periodic modulation of the refractive index written into the core of an optical fiber. It reflects a narrow band of wavelengths (Bragg wavelength) while transmitting others, enabling wavelength-selective filtering and distributed sensing within standard single-mode or specialty fibers.

Each Fiber Bragg Grating is characterized by its center (Bragg) wavelength, reflectivity, bandwidth, and grating length. By tailoring these parameters, manufacturers provide gratings suited for telecom filtering, laser stabilization, structural health monitoring, and high-precision temperature and strain sensing.

Typical Specifications for Fiber Bragg Grating Devices

On FindLight you will find Fiber Bragg Grating products with specifications such as:

  • Center wavelength: Typically 850 nm, 980 nm, 1064 nm, 1310 nm, 1550 nm, or custom ranges.
  • Reflectivity: From ~5% for tap gratings up to >99% for high-reflectivity mirrors.
  • Bandwidth (FWHM): Narrowband (<0.2 nm) to several nanometers for sensing or dispersion tailoring.
  • Grating length: From a few millimeters to several centimeters, affecting bandwidth and side-lobe structure.
  • Apodization and chirp: Uniform, apodized, or chirped Fiber Bragg Grating designs for dispersion compensation and pulse shaping.
  • Strain and temperature sensitivity: Specified in pm/µε and pm/°C for sensing applications.
  • Fiber type and coating: Standard SMF-28, polarization-maintaining, high-temperature fibers, with acrylate, polyimide, or metal coatings.

Use Cases in Light Transport Systems

Fiber Bragg Grating components are used as in-fiber filters in WDM systems, as cavity mirrors for fiber lasers, and as wavelength lockers for pump sources. In structural monitoring, arrays of gratings enable distributed measurement of strain and temperature along bridges, pipelines, wind turbines, and aerospace structures, all integrated in a compact light transport platform.

Buyer Guidance on FindLight

When selecting a Fiber Bragg Grating on FindLight, compare center wavelength tolerance, reflectivity, bandwidth, side-lobe suppression, and environmental ratings against your system requirements. Check connector type, pigtail length, and compatibility with your interrogation unit or laser cavity. You can request quotes directly from multiple suppliers for any Fiber Bragg Grating listed, obtain custom wavelength or packaging options, and communicate technical requirements without registration, streamlining your procurement and R&D evaluation process.