深圳大学学报理工版

研制一种双芯光子晶体光纤,其零色散波长位于1 010 nm,在波长1 060 nm处的非线性系数为6.82 W-1·km-1. 利用中心波长1 060 nm、重复频率1 MHz、脉冲宽度150 ps、最大输出功率4.5 W及光束质量M2<1.3的增益开关皮秒脉冲全保偏光纤激光器泵浦长度为35 m的双芯光子晶体光纤,得到谱宽为480～2 200 nm、输出功率为371.7 mW的宽带平坦全光纤化超连续谱光源. 长波方向10 dB谱宽为1 140 nm(1 060～2 200 nm),短波方向3 dB谱宽为460 nm(580～1 040 nm),其远场输出为具有准高斯分布.

A dual-core photonic crystal fiber(PCF)is reported with a zero dispersion wavelength(ZDW)at 1 010 nm and the nonlinear coefficient of 6.82 W-1·km-1 at 1 060 nm. A stably gain-switched all-polarization-maintaining fiber laser system with central wavelength of 1 060 nm, pulse duration of 150 ps, repetition rate of 1 MHz, beam quality M2<1.3 and maximum output power of 4.5 W was used for pumping a 35 m-long dual-core PCF. Results show that the supercontinuum generation(SCG)outputs power of 371.7 mW cover wavelengths from 480 nm to 2 200 nm. In the long wavelength regime,the 10 dB bandwidth ranges from 1 060 nm to 2 200 nm(spectral width of 1 140 nm). In the short wavelength regime, the 3 dB bandwidth ranges from 580 nm to 1 040 nm(spectral width of 460 nm), and the far field exhibits a perfect quasi-Gaussian shape.

引言
1 实验装置
2 实验结果
3 结语

图1 实验装置图
Fig.1 Experimental setup

图2 双芯光子晶体光纤扫描电镜图<br/>Fig.2 SEM of dual core PCF

图2 双芯光子晶体光纤扫描电镜图
Fig.2 SEM of dual core PCF

图3 双芯光子晶体光纤的色散和非线性曲线<br/>Fig.3 Dispersion and nonlinear curves of dual core PCF

图3 双芯光子晶体光纤的色散和非线性曲线
Fig.3 Dispersion and nonlinear curves of dual core PCF

图4 不同输出功率下的超连续谱<br/>Fig.4 Output spectra of the SC at different output powers

图4 不同输出功率下的超连续谱
Fig.4 Output spectra of the SC at different output powers

$图5 双芯光子晶体光纤的相位匹配曲线<br/>Fig.5 The calculated group refractive index for dual core PCF$

图5 双芯光子晶体光纤的相位匹配曲线
Fig.5 The calculated group refractive index for dual core PCF

图6 最大输出功率下的超连续谱模式<br/>Fig.6 The mode profiles of SC at maximum output power

图6 最大输出功率下的超连续谱模式
Fig.6 The mode profiles of SC at maximum output power

图7 最大输出功率下的远场光斑
Fig.7 Far field profile of output beam at maximum output power

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备注

引言

1 实验装置

2 实验结果

3 结语

期刊信息

备注

引言

1 实验装置

2 实验结果

3 结 语

期刊信息

3 结语