Lasers, Fiber Optics, and Communications

1484-nm two-cascaded Raman fiber laser mode-locked by an intermode-beating mode-locking technique

[+] Author Affiliations
Fengfu Xiong, Yizhong Huang, Lili Le, Nan Chen

Xiamen University, Department of Electronic Engineering, Xiamen 361005, China

Bin Xu, Zhiping Cai, Zhengqian Luo

Xiamen University, Department of Electronic Engineering, Xiamen 361005, China

Xiamen University, Optoelectronics Engineering Research Center, Xiamen 361005, China

Opt. Eng. 54(4), 046102 (Apr 07, 2015). doi:10.1117/1.OE.54.4.046102
History: Received January 19, 2015; Accepted March 17, 2015
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Abstract.  We demonstrate a 1484-nm two-cascaded Raman mode-locked fiber laser based on the intermode-beating mode-locking (IBML) technique. Through the two-cascaded Raman shifts of P2O5 in a phosphosilicate fiber, the continuous-wave (CW) 1064-nm Raman pump can be transferred to the 1484-nm second-order Stokes. When the intermode-beating frequency of the 1064-nm pump source matches with the 1484-nm Raman-cavity frequency, the IBML condition is satisfied, and the harmonic mode-locking at 1484-nm occurs to stably emit nanosecond pulse trains. By properly adjusting the 1484 nm Raman-cavity length, we have further realized the tuning of the mode-locking harmonic order. The 472nd- and 757th-order harmonic mode-locking operations with repetition rates of 72.728 and 116.292 MHz have been obtained, respectively. The IBML operation is stable with a radio-frequency (RF) supermode suppression ratio of 33.9 dB and RF signal-to-noise ratio of 51.8 dB.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Fengfu Xiong ; Yizhong Huang ; Lili Le ; Bin Xu ; Nan Chen, et al.
"1484-nm two-cascaded Raman fiber laser mode-locked by an intermode-beating mode-locking technique", Opt. Eng. 54(4), 046102 (Apr 07, 2015). ; http://dx.doi.org/10.1117/1.OE.54.4.046102


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