A new method for sampled fiber Bragg grating fabrication by use of both femtosecond laser and CO_2 laser

A new method for sample fiber Bragg grating fabrication by use of both femtosecond laser and CO 2 laser has been proposed and demonstrated.Such a method exhibits the advantages of high fabrication flexibility, and good thermal stability.The sampling period and duty cycle can be easily varied by changing the CO 2 laser beam scanning pattern during operation.The gratings produced have potential applications in optical communications, fiber lasers, and optical fiber sensors.