Title :
Tunable Dual-Wavelength Thulium-Doped Fiber Laser by Employing a HB-FBG
Author :
Shuo Liu ; Fengping Yan ; Wanjing Peng ; Ting Feng ; Ze Dong ; Geekung Chang
Author_Institution :
Key Lab. of All Opt. Network & Adv. Telecommun. of Electromagn. Compatibility, Beijing Jiaotong Univ., Beijing, China
Abstract :
A novel tunable dual-wavelength thulium-doped fiber laser is demonstrated experimentally. The wavelength-tuning by employing a high birefringence fiber Bragg grating is proposed in 2-μm band lasing for the first time. By adjusting the polarization controller, stable dual-wavelength operation at the wavelengths of 1941.40 and 1942.21 nm is obtained. The optical signal-to-noise ratio is better than 48 dB. A 15.5% slope efficiency is achieved using a 90% output coupling ratio for laser extracting. The wavelength-tuning range in dual-wavelength operation is as wide as 6.93 nm.
Keywords :
Bragg gratings; birefringence; fibre lasers; laser beams; laser noise; laser stability; laser tuning; optical fibre polarisation; thulium; HB-FBG; band lasing; efficiency 15.5 percent; high birefringence fiber Bragg grating; optical signal-to-noise ratio; output coupling ratio; polarization controller; slope efficiency; stable dual-wavelength operation; tunable dual-wavelength thulium-doped fiber laser; wavelength 1941.40 nm; wavelength 1942.21 nm; wavelength 2 mum; Fiber lasers; Optical fiber couplers; Optical fiber polarization; Optical pumping; Pump lasers; High birefringence fiber Bragg gratings; fiber lasers; wavelength-tuning;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2336654
