纳秒声光调Q光纤激光器产生超连续谱

高静; 于峰; 匡鸿深; 葛廷武; 王智勇

doi:10.3788/OPE.20142205.1138

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纳秒声光调Q光纤激光器产生超连续谱

现代应用光学 | 更新时间：2020-08-13

- 纳秒声光调Q光纤激光器产生超连续谱
- Generation of supercontinuum spectra from acousto-optic Q-switched nanosecond fiber lasers
- 光学精密工程 2014年22卷第5期页码：1138-1142
- 作者机构：
  
  北京工业大学激光工程研究院国家产学研激光技术中心北京,100124
- 作者简介：
- 基金信息：
  
  科研基地-科技创新平台-光纤激光器研究平台-高功率全光纤激光器开发项目（No.PXM2011_014204_09_000060）()
- DOI：10.3788/OPE.20142205.1138
  中图分类号： TN248.1
- 收稿日期：2013-06-21，
  
  修回日期：2013-08-13，
  
  纸质出版日期：2014-05-25
- 稿件说明：
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高静, 于峰, 匡鸿深等. 纳秒声光调Q光纤激光器产生超连续谱[J]. 光学精密工程, 2014,22(5): 1138-1142

GAO Jing, YU Feng, KUANG Hong-shen etc. Generation of supercontinuum spectra from acousto-optic Q-switched nanosecond fiber lasers[J]. Editorial Office of Optics and Precision Engineering, 2014,22(5): 1138-1142
高静, 于峰, 匡鸿深等. 纳秒声光调Q光纤激光器产生超连续谱[J]. 光学精密工程, 2014,22(5): 1138-1142 DOI： 10.3788/OPE.20142205.1138.

GAO Jing, YU Feng, KUANG Hong-shen etc. Generation of supercontinuum spectra from acousto-optic Q-switched nanosecond fiber lasers[J]. Editorial Office of Optics and Precision Engineering, 2014,22(5): 1138-1142 DOI： 10.3788/OPE.20142205.1138.

摘要

根据现有生成超连续谱方案的不足，搭建了一台全光纤结构的纳秒声光调

激光器。该激光器中心波长为1064.3nm，重复频率为20kHz，脉冲宽度为250ns；经过一级放大得到的输出功率为13.02W。将信号光耦合进自行研制的高功率模场适配器（MFA），得到了10.7W的信号光输出，耦合效率高达82.2%。将MFA与光子晶体光纤（PCF）熔接，得到了平均功率为5.43W的超连续谱输出，光谱覆盖为900~1700nm。由于实验采用的声光调制器（AOM）脉宽较宽，导致泵浦光峰值较低，非线性效应较弱，未能使超连续谱向可见光展宽。因此，建议采用较窄脉宽的AOM作为调

元件来实现高峰值功率输出，以改善纳秒脉冲PCF产生的超连续谱特性。

Abstract

For the shortcomings of current schemes to generate laser supercontinuum spectra

an acousto-optic

-switched nanosecond all fiber laser is established.The laser shows its central wavelength at 1 064.3 nm

repetition rate of 20 kHz and a pulse duration of 250 ns. After primary amplification

the output power is 13.02 W.When the amplified pulse is launched into a self-made high power Mode Field Adaptor(MFA)

the signal light output can be 10.7 W and the coupling efficiency is up to 82.2%.After the MFA is spliced with a piece of Photonic Crystal Fiber(PCF)

the output supercontinuum spectrum with an average output power of 5.43 W can be obtained at a wavelength range from 900 nm to 1 700 nm.As the Acoustic Optical Modulator(AOM) in the experiment has a wider pulse duration

which leads to a lower peak value of pump light and a lower nonlinear effect

so that the supercontinuum spectra do not include the visual part.It suggests that the AOM with narrower pulse duration should be used to generate high peak power to widen the spectral bandwidth and flatten the supercontinuum spectra.

关键词

Keywords

references

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SONG R, HOU J, CHEN S P, et al..157 W all-fiber high-power picosecond laser [J].Applied Optics, 2012, 51(13):2497-2500.

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