深圳大学学报理工版

基于线型腔结构实现中心波长约1 945 nm、功率150 mW的连续激光输出,采用3级主振荡功率放大(master oscillator power amplifier,MOPA)结构,实现123 W的掺铥激光输出,斜率效率为59.1%. 搭建基于调制半导体激光器,输出波长为1 550 nm的铒镱共掺光纤放大器,实现平均功率1.2 W、脉宽50 ns、重复频率200 kHz的脉冲激光输出. 将该铒镱共掺光纤放大器作为泵浦源,采用线型腔结构抽运掺铥光纤,实现中心波长约为1 945 nm的增益调制脉冲激光输出,重复频率为100 kHz,脉宽约为800 ns. 采用3级MOPA结构对此增益调制掺铥脉冲光纤激光器进行功率放大,实现平均功率115 W、单脉冲能量1.15 mJ的激光输出,且放大过程中无非线性效应产生.

We constructed a three-stage master oscillator power amplifier(MOPA)seeded by a linear fiber oscillator with 150 mW continuous wave laser output at 1 945 nm, which can deliver 123 W output power with 59.1% slope efficiency. Using a modulated semiconductor laser, we also constructed an Er-Yb co-doped fiber amplifier(EYDFA)and obtained 1.2 W average power output at 1 550 nm with the pulse width of 50 ns and repetition rate of 200 kHz. Using this pulsed EYDFA as the pump source to pump a linear thulium doped fiber cavity, a gain-switched pulsed laser was realized, which can generate pulses with the repetition rate of 100 kHz and width of 800 ns, centering at 1 945 nm. After three-stage MOPA amplification, the laser power is scaled to 115 W; and the corresponding pulse energy was 1.15 mJ. No nonlinear effect was observed during the power amplification.

引言
1 研究背景
2 百瓦级连续掺铥光纤激光器
4 结语

图1 连续种子激光装置示意图<br/>Fig.1 (Color online)Schematic setup of the continuous wave seed laser(fiber Bragg grating, FBG)

图1 连续种子激光装置示意图
Fig.1 (Color online)Schematic setup of the continuous wave seed laser(fiber Bragg grating, FBG)

图2 MOPA结构装置示意图<br/>Fig.2 (Color online)Schematic setup of the thulium doped all-fiber MOPA

图2 MOPA结构装置示意图
Fig.2 (Color online)Schematic setup of the thulium doped all-fiber MOPA

图3 连续种子激光输出光谱<br/>Fig.3 Spectrum of the continuous wave seed laser

图3 连续种子激光输出光谱
Fig.3 Spectrum of the continuous wave seed laser

图4 功率放大级输出功率特性<br/>Fig.4 (Color online)Output power versus the incident pump power

图4 功率放大级输出功率特性
Fig.4 (Color online)Output power versus the incident pump power

图5 增益调制脉冲激光器装置图<br/>Fig.5 (Color online)Schematic setup of the gain-switched fiber laser

图5 增益调制脉冲激光器装置图
Fig.5 (Color online)Schematic setup of the gain-switched fiber laser

图6 增益调制脉冲时域特性<br/>Fig.6 (Color online)Temporal characteristic of gain-switched pulse

图6 增益调制脉冲时域特性
Fig.6 (Color online)Temporal characteristic of gain-switched pulse

图7 增益调制脉冲放大功率特性曲线<br/>Fig.7 (Color online)Average output power of the gain-switched pulse versus the incident pump power

图7 增益调制脉冲放大功率特性曲线
Fig.7 (Color online)Average output power of the gain-switched pulse versus the incident pump power

图8 不同功率下的输出光谱<br/>Fig.8 (Color online)Laser spectrum versus the average output power

图8 不同功率下的输出光谱
Fig.8 (Color online)Laser spectrum versus the average output power

图9 增益调制脉冲放大时域特性<br/>Fig.9 (Color online)Temporal characteristic of amplified gain-switched pulse

图9 增益调制脉冲放大时域特性
Fig.9 (Color online)Temporal characteristic of amplified gain-switched pulse

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备注

引言

1 研究背景

2 百瓦级连续掺铥光纤激光器

4 结语

期刊信息

备注

引言

1 研究背景

2 百瓦级连续掺铥光纤激光器

4 结 语

期刊信息

4 结语