title: Short monolithic dual-wavelength single-longitudinal-mode DBR phosphate fiber laser.
abstract: We propose and demonstrate a 5-cm-long monolithic dual-wavelength single-longitudinal mode distributed Bragg reflector (DBR) all-phosphate fiber laser. Strong UV-induced fiber Bragg gratings are directly written in highly Er/Yb codoped phosphate fiber. The separation between gratings is selected as 1 cm to only excite two longitudinal modes in the DBR cavity. By exploiting the spatial hole burning effect and the polarization hole burning effect, stable narrow-linewidth dual-wavelength lasing emission with 38 pm wavelength spacing and a total emitted power of 2.8 mW is obtained from this DBR fiber laser. A microwave signal at 4.58 GHz is generated by the heterodyne detection of the dual-wavelength laser.
authors: Lingyun
authors: L
authors: Xiong
authors: Peter
authors: P
authors: Hofmann
authors: Axel
authors: A
authors: Schülzgen
authors: N
authors: N
authors: Peyghambarian
authors: Jacques
authors: J
authors: Albert