Special Section on 2-D Materials for Optics and Photonics

Graphene mode-locked and Q-switched 2-μm Tm/Ho codoped fiber lasers using 1212-nm high-efficient pumping

[+] Author Affiliations
Zhengqian Luo, Yingyue Li, Yizhong Huang, Min Zhong, Xiaojiao Wan

Xiamen University, Department of Electronic Engineering, Haiyun campus, Siming South Road 420#, Xiamen 361005, China

Opt. Eng. 55(8), 081310 (Feb 18, 2016). doi:10.1117/1.OE.55.8.081310
History: Received October 26, 2015; Accepted January 18, 2016
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Abstract.  We report graphene mode-locked or Q-switched Tm/Ho-codoped fiber laser pumped by a 1212-nm phosphorus-doped fiber Raman laser. First, comparison experiments were performed for a continuous-wave 2  μm Tm/Ho-codoped fiber laser pumped by a 1565-nm laser or a 1212-nm laser, verifying that the 1212-nm pumping is more efficient than the conventional 1560-nm pumping. Then, we further realized 1212-nm highly efficient pumped Tm/Ho-codoped fiber lasers mode-locked and Q-switched by a graphene saturable absorber, respectively. Using only 30-cm Tm-Ho gain fiber under the 1212-nm pumping, the passive Q-switching at a center wavelength of 1976 nm was efficiently generated with tunable repetition rate between 32.2 and 43.0 kHz and shortest pulse width of 1.41  μs. Moreover, the passive mode-locking at 1913.7 nm was stably achieved with a fundamental repetition rate of 19.978 MHz and pulse energy of 20  pJ. To the best of our knowledge, it is the first demonstration of 2-μm pulsed fiber lasers high efficiently pumped by a 1212-nm laser.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zhengqian Luo ; Yingyue Li ; Yizhong Huang ; Min Zhong and Xiaojiao Wan
"Graphene mode-locked and Q-switched 2-μm Tm/Ho codoped fiber lasers using 1212-nm high-efficient pumping", Opt. Eng. 55(8), 081310 (Feb 18, 2016). ; http://dx.doi.org/10.1117/1.OE.55.8.081310


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