title: Type IIa Bragg grating based ultra-short DBR fiber laser with high temperature resistance.
abstract: We report on the fabrication of a thermally resistant ultra-short distributed Bragg reflector (DBR) fiber laser based on the photo inscription of two wavelength-matched type IIa gratings in a thin-core Er-doped fiber. With continuous UV exposure, each Bragg reflector initially grows as a type I grating, followed by decay in strength, and then re-grows as a type IIa grating with enhanced thermal resistance. The DBR laser, with an entire length of 13 mm, can stably operate at 600°C with single longitude mode, which provides potential applications in high temperature environments.
authors.forename: Yang
authors.initials: Y
authors.lastname: Ran
authors.forename: Fu-Rong
authors.initials: FR
authors.lastname: Feng
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Liang
authors.forename: Long
authors.initials: L
authors.lastname: Jin
authors.forename: Bai-Ou
authors.initials: BO
authors.lastname: Guan