High thermal stability of ultra-low insertion loss type II cladding fiber Bragg grating based on femtosecond laser point-by-point technology
Dan Su, Xueguang Qiao
Abstract
The insertion loss (IL) of the type II fiber Bragg grating (FBG) induced by the femtosecond laser limits its multiplexing performance. Femtosecond laser point-by-point (PbP) technology is used to directly write type II fiber gratings in the cladding of single-mode fibers that avoids short-wave loss and features a temperature resistance of up to 1100 °C. The cladding FBG is integrated in series along the fiber axis, and the IL of the eight cladding FBGs is less than 0.06 dB. Cladding FBGs with ultra-low IL has potential applications in the fields of optical fiber sensors and communications.
Topics & Concepts
Fiber Bragg gratingMaterials scienceOpticsCladding (metalworking)PHOSFOSFemtosecondFiber laserLong-period fiber gratingLaserInsertion lossCladding modeOptical fiberAll-silica fiberOptoelectronicsPlastic optical fiberPolarization-maintaining optical fiberFiber optic sensorWavelengthPhysicsComposite materialAdvanced Fiber Optic SensorsPhotonic and Optical DevicesPhotonic Crystal and Fiber Optics