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基于色散波的1 μm飞秒光纤啁啾脉冲放大系统

1 μm Femtosecond Fiber Chirped Pulse Amplification System Based on Dispersion Wave

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摘要

飞秒激光在工业加工、激光传感、军事国防、科学研究等领域有着重要的应用前景。报道了一个工作在1 μm波段的飞秒光纤啁啾脉冲放大(FCPA)系统。该系统主要包括一个1.5 μm全光纤被动锁模光源、一个1 μm波段非线性频率转换装置、两级掺镱光纤放大器及一个基于透射式衍射光栅对的脉冲压缩器。掺铒锁模光源中心波长为1.55 μm、3 dB光谱带宽为12.9 nm、重复频率为17.5 MHz, 经功率放大后注入一段9.5 cm高非线性光纤中产生1 μm波段色散波, 其中心波长为1070 nm, 3 dB光谱带宽为33 nm。将此色散波脉冲作为种子源通过声光调制器选频后得到重复频率为1.09 MHz的脉冲输出。随后功率放大至11.4 W, 压缩后得到平均功率为7.7 W、10 dB光谱宽度为21.4 nm、脉冲宽度为270 fs、峰值功率为26 MW的飞秒脉冲激光输出。

Abstract

Femtosecond laser has important applications in such fields as industrial processing, laser sensing, military defense, and scientific research. A femtosecond fiber chirped pulse amplification (FCPA) system operating at 1 μm is reported. This system consists of a 1.5 μm all-fiber passive mode-locked laser source, a 1 μm nonlinear frequency converter, a two-stage Yb-doped amplifier, and a transmission diffraction grating pulse compressor. The center wavelength of the erbium-doped mode light source is 1.55 μm, the spectral bandwidth of 3 dB is 12.9 nm and the repetition frequency is 17.5 MHz. After power amplification, a 9.5 cm high nonlinear fiber is injected to generate 1 μm band dispersion wave with center wavelength of 1070 nm and 3 dB spectral bandwidth of 33 nm. Moreover, using this dispersion wave pulse as the seed source, the pulse output with repetition rate of 1.09 MHz is achieved by using a frequency selector of acousto-optic modulator. After that, the power is amplified to 11.4 W, and with the femtosecond pulse laser output with average power of 7.7 W, spectral bandwidth of 21.4 nm at 10 dB, pulse duration of 270 fs, and peak power of 26 MW is achieved after compression.

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中图分类号:TN248

DOI:10.3788/cjl201845.0101001

所属栏目:激光器件与激光物理

基金项目:国家自然科学基金重大科研仪器研制项目(61527822)

收稿日期:2017-06-12

修改稿日期:2017-07-11

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作者单位    点击查看

孙若愚:北京工业大学北京市激光应用技术工程技术研究中心, 激光工程研究院, 北京 100124
谭方舟:北京工业大学北京市激光应用技术工程技术研究中心, 激光工程研究院, 北京 100124
金东臣:北京工业大学北京市激光应用技术工程技术研究中心, 激光工程研究院, 北京 100124
洪畅:北京工业大学北京市激光应用技术工程技术研究中心, 激光工程研究院, 北京 100124
王璞:北京工业大学北京市激光应用技术工程技术研究中心, 激光工程研究院, 北京 100124

联系人作者:孙若愚(sunruoyu999@emails.bjut.edu.cn)

备注:孙若愚(1990-), 男, 博士研究生, 主要从事超快光纤激光器、高功率光纤激光器、高功率光纤放大器等方面的研究。

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引用该论文

Sun Ruoyu,Tan Fangzhou,Jin Dongchen,Hong Chang,Wang Pu. 1 μm Femtosecond Fiber Chirped Pulse Amplification System Based on Dispersion Wave[J]. Chinese Journal of Lasers, 2018, 45(1): 0101001

孙若愚,谭方舟,金东臣,洪畅,王璞. 基于色散波的1 μm飞秒光纤啁啾脉冲放大系统[J]. 中国激光, 2018, 45(1): 0101001

被引情况

【1】周锋全,袁帅,郭政儒,郝强,徐晖,曾和平. 高功率小型光纤飞秒激光放大系统. 激光与光电子学进展, 2018, 55(10): 103201--1

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