title: Tunable and switchable dual-wavelength single polarization narrow linewidth SLM erbium-doped fiber laser based on a PM-CMFBG filter.
abstract: A tunable and switchable dual-wavelength single polarization narrow linewidth single-longitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser based on polarization-maintaining chirped moiré fiber Bragg grating (PM-CMFBG) filter is proposed and demonstrated. For the first time as we know, the CMFBG inscribed on the PM fiber is applied for the wavelength-tunable and-switchable dual-wavelength laser. The PM-CMFBG filter with ultra-narrow transmission band (0.1 pm) and a uniform polarization-maintaining fiber Bragg grating (PM-FBG) are used to select the laser longitudinal mode. The stable single polarization SLM operation is guaranteed by the PM-CMFBG filter and polarization controller. A tuning range of about 0.25 nm with about 0.075 nm step is achieved by stretching the uniform PM-FBG. Meanwhile, the linewidth of the fiber laser for each wavelength is approximate 6.5 and 7.1 kHz with a 20 dB linewidth, which indicates the laser linewidth is approximate 325 Hz and 355 Hz FWHM.
authors.forename: Bin
authors.initials: B
authors.lastname: Yin
authors.forename: Suchun
authors.initials: S
authors.lastname: Feng
authors.forename: Zhibo
authors.initials: Z
authors.lastname: Liu
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Bai
authors.forename: Shuisheng
authors.initials: S
authors.lastname: Jian
mesh_terms: D004867:Equipment Design; D004871:Erbium / Q000737:chemistry*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted
chemical_list: D004871:Erbium