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Switchable Dual-Wavelength Synchronously Q-Switched Erbium-Doped Fiber Laser Based on Graphene Saturable Absorber

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5 Author(s)
Wang, Z.T. ; Key Lab. for Micro-/Nano-Optoelectron. Devices of Minist. of Educ., Hunan Univ., Changsha, China ; Chen, Y. ; Zhao, C.J. ; Zhang, H.
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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.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 3 )