Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier

doi:10.1088/1674-1056/22/8/084206

中国物理B ›› 2013, Vol. 22 ›› Issue (8): 84206-084206.doi: 10.1088/1674-1056/22/8/084206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier

宋锐^a, 侯静^a, 王泽锋^a, 肖瑞^b, 陆启生^a

a College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
b Beijing Institute of Radiation Medicine, Beijing 100850, China

收稿日期:2012-12-18 修回日期:2013-03-26 出版日期:2013-06-27 发布日期:2013-06-27
基金资助:
Project supported by the State Key Program of the National Natural Science Foundation of China (Grant No. 61235008), the National Natural Science Foundation of China (Grant Nos. 61077076, 11004247, and 11274385), the International Science & Technology Cooperation of China (Grant No.2012DFG11470), the Natural Science Foundation for Distinguished Young Scholars of Hunan Province of China (Grant No. 12JJ1010), the Outstanding Youth Fund Project of Hunan Province of China, and the Fund of Innovation of National University of Defense Technology of China (Grant No. B120701).

Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier

Song Rui (宋锐)^a, Hou Jing (侯静)^a, Wang Ze-Feng (王泽锋)^a, Xiao Rui (肖瑞)^b, Lu Qi-Sheng (陆启生)^a

a College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
b Beijing Institute of Radiation Medicine, Beijing 100850, China

Received:2012-12-18 Revised:2013-03-26 Online:2013-06-27 Published:2013-06-27
Contact: Hou Jing, Xiao Rui E-mail:houjing25@sina.com; ruixiao203@sina.com
Supported by:
Project supported by the State Key Program of the National Natural Science Foundation of China (Grant No. 61235008), the National Natural Science Foundation of China (Grant Nos. 61077076, 11004247, and 11274385), the International Science & Technology Cooperation of China (Grant No.2012DFG11470), the Natural Science Foundation for Distinguished Young Scholars of Hunan Province of China (Grant No. 12JJ1010), the Outstanding Youth Fund Project of Hunan Province of China, and the Fund of Innovation of National University of Defense Technology of China (Grant No. B120701).

摘要/Abstract

摘要： Theoretical and experimental research on the effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier is carried out. The complex Ginzburg-Landau equation is used to simulate the propagation of the pulse in the fiber amplifier and the results show that pulses with negative initial chirp produce the widest supercontinuum and pulses with positive initial chirp produce the narrowest supercontinuum when the central wavelength of the pump lies in the normal dispersion region of the gain fiber. A self-made line width narrowing system is utilized to control the initial chirp of the nanosecond pump pulse and a four-stage master oscillator power amplifier configuration is adopted to produce a high power near-infrared suppercontinuum. The experimental results are in good agreement with simulations which can provide some guidance on further optimization of the system in future work.

关键词: fiber laser, supercontinuum, initial chirp, fiber amplifier

Abstract: Theoretical and experimental research on the effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier is carried out. The complex Ginzburg-Landau equation is used to simulate the propagation of the pulse in the fiber amplifier and the results show that pulses with negative initial chirp produce the widest supercontinuum and pulses with positive initial chirp produce the narrowest supercontinuum when the central wavelength of the pump lies in the normal dispersion region of the gain fiber. A self-made line width narrowing system is utilized to control the initial chirp of the nanosecond pump pulse and a four-stage master oscillator power amplifier configuration is adopted to produce a high power near-infrared suppercontinuum. The experimental results are in good agreement with simulations which can provide some guidance on further optimization of the system in future work.

Key words: fiber laser, supercontinuum, initial chirp, fiber amplifier

中图分类号: (Fiber lasers)

42.55.Wd

42.65.Tg (Optical solitons; nonlinear guided waves)

宋锐, 侯静, 王泽锋, 肖瑞, 陆启生. Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier[J]. 中国物理B, 2013, 22(8): 84206-084206.

Song Rui (宋锐), Hou Jing (侯静), Wang Ze-Feng (王泽锋), Xiao Rui (肖瑞), Lu Qi-Sheng (陆启生). Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier[J]. Chin. Phys. B, 2013, 22(8): 84206-084206.

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Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier

Effect of initial chirp on near-infrared supercontinuum generation by a nanosecond pulse in a nonlinear fiber amplifier

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