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Optical Engineering

1484-nm two-cascaded Raman fiber laser mode-locked by an intermode-beating mode-locking technique
Author(s): Fengfu Xiong; Yizhong Huang; Lili Le; Bin Xu; Nan Chen; Zhiping Cai; Zhengqian Luo
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Paper 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.

Paper Details

Date Published: 7 April 2015
PDF: 6 pages
Opt. Eng. 54(4) 046102 doi: 10.1117/1.OE.54.4.046102
Published in: Optical Engineering Volume 54, Issue 4
Show Author Affiliations
Fengfu Xiong, Xiamen Univ. (China)
Yizhong Huang, Xiamen Univ. (China)
Lili Le, Xiamen Univ. (China)
Bin Xu, Xiamen Univ. (China)
Xiamen Univ. (China)
Nan Chen, Xiamen Univ. (China)
Zhiping Cai, Xiamen Univ. (China)
Xiamen Univ. (China)
Zhengqian Luo, Xiamen Univ. (China)
Xiamen Univ. (China)

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