Title :
Switchable Dual-Wavelength Synchronously Q-Switched Erbium-Doped Fiber Laser Based on Graphene Saturable Absorber
Author :
Wang, Z.T. ; Chen, Y. ; Zhao, C.J. ; Zhang, H. ; Wen, S.C.
Author_Institution :
Key Lab. for Micro-/Nano-Optoelectron. Devices of Minist. of Educ., Hunan Univ., Changsha, China
fDate :
6/1/2012 12:00:00 AM
Abstract :
We demonstrate a switchable dual-wavelength synchronously pulsed fiber laser Q-switched by graphene saturable absorber. Wavelength-resolved studies on the output Q-switched pulses show that despite of large wavelength spacing up to 26 nm, the two Q-switched pulses at each individual wavelength can be temporally synchronized with per-pulse energy up to ~ 70 nJ. Further experiments show that by adjusting the intracavity birefringence, dual-wavelength emission can be switched to another dual-wavelength operation regime with wavelength separation of 5.7 nm. Our experimental results are also qualitatively supported by the cavity linear transmission characteristics of the ring cavity.
Keywords :
Q-switching; erbium; fibre lasers; graphene; laser cavity resonators; optical saturable absorption; C; Q-switching; cavity linear transmission; dual wavelength emission; erbium doped fiber laser; graphene saturable absorber; intracavity birefringence; ring cavity; switchable dual-wavelength synchronously pulsed fiber laser; wavelength 5.7 nm; wavelength separation; Cavity resonators; Laser excitation; Optical polarization; Optical pulses; Optical switches; Pump lasers; Q-switching; fiber laser; graphene; ultrashort pulse;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2199102
