Chirped Fiber Grating

Center Wavelength Range [Tolerance :±0.3]: 1030~1080 nm Reflectance [Tolerance :±5%]: 0.5%~99.9% Bandwidth (FWHM) [Tolerance :±0.05]: 0.1~1.5 nm

Double-clad fiber gratings are inscribed in passive double-clad fiber. In fiber lasers using cladding-mode pumping, energy carried by cladding modes greatly increases pump power and efficiency. High-power lasers commonly use doped double-clad gain fiber and fiber gratings as cavity mirrors. Gratings with matching parameters couple efficiently to the doped fiber and have an indispensable role in high-power fiber lasers.

Center Wavelength Range [Tolerance :±0.3]: 970~980 nm Center Wavelength Range [Tolerance :±0.3]: 1060~1066 nm Center Wavelength Range [Tolerance :±0.3]: 1310 nm

Uniform fiber gratings have side peaks around their main reflection peak, called grating side modes. These degrade channel isolation in devices requiring strong side-mode suppression, such as dense wavelength-division multiplexers. Modulating the refractive-index modulation amplitude with a specified function suppresses the side modes, producing an apodized fiber grating. Through sustained research and testing, our team developed a mature amplitude-mask process that achieves strong side-mode suppression with high reflectivity and narrow bandwidth.

Center Wavelength [Contact us for other wavelengths.]: 1010 to 2110nm Reflectance: 3% (OC) ~ 99.9% (HR) FWHM Bandwidth: 0.2 ~ 4nm

In fiber lasers, double-clad fiber is the waveguide medium. Its very small core confines few laser modes, readily producing high power density. With cladding-mode pumping, the inner cladding supports high-power semiconductor pumping for increased efficiency and gain. High-power fiber lasers commonly use ytterbium-doped double-clad fiber as the gain medium, with a stable resonator formed by a high-reflection (HR) fiber grating and an output-coupling (OC) fiber grating. Double-clad gratings with matching parameters couple efficiently to the doped fiber and are indispensable in high-power fiber lasers. We supply dedicated grating pairs for fiber-laser resonators. Mature double-clad grating inscription controls the HR/OC wavelength difference within 0.2nm, matching their center wavelengths. Special grating thermal management enables KW-level power handling to meet demanding reliability and performance requirements.

MJ-WorkS-FBG is a high-performance, ultrahigh-precision laser direct-writing system for fiber sensing and optical communications. Ultrahigh-definition imaging and nanoscale positioning/alignment enable waveguide coupling between fibers and fiber arrays, and nanoscale3D complex-structure and FBG fabrication on fiber cores, end faces, sides, and interiors. A dedicated roll-to-roll automatic fiber feeder, stress monitoring, and automatic core recognition, positioning, and alignment enable high-throughput, precise, rapid production.