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

Volume

4

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

869

Lastpage

876

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;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2012.2199102

Filename

6198858