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

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 b...

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Bibliographic Details
Published in:IEEE photonics journal 2012-06, Vol.4 (3), p.869-876
Main Authors: Wang, Z. T., Chen, Y., Zhao, C. J., Zhang, H., Wen, S. C.
Format: Article
Language:English
Subjects:
Cavity resonators
fiber laser
graphene
Laser excitation
Optical polarization
Optical pulses
Optical switches
Pump lasers
Q-switching
ultrashort pulse
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Summary: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.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2012.2199102