太赫兹时域光谱仪中飞秒光纤激光器的研制
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摘要
飞秒光纤激光器作为产生宽带太赫兹波的激励光源,是太赫兹时域光谱检测系统的核心部件,其性能指标直接影响着太赫兹光谱检测系统的性能。针对时域太赫兹光谱应用需求,研制出基于半导体可饱和吸收镜(SESAM)和非线性偏振旋转(NPE)复合锁模技术的飞秒光纤激光器,并采用腔内色散管理技术,在保证脉冲宽度小于100fs条件下实现0.5～5m的保偏光纤输出。该激光器已应用于湖北久之洋红外系统股份有限公司生产的mini-T系列便携式太赫兹光谱仪产品中,实现光谱宽度覆盖0.1～7THz,频谱分辨力9GHz,动态范围优于70dB。
As the pump source of producing broad band Terahertz,femtosecond fiber laser is the kernel component of the THz spectrum detection system,so the performance of the whole Terahertz spectrum detection system depends on the femtosecond fiber laser.To satisfy terahertz system requirement,a femtosecond fiber laser has been developed successfully,which also employs following methods:SESAM(Semiconductor Saturable Absorber Mirror)and NPE(Nonlinear Polarization Evolution)hybrid mode-lock method,high precision cavity dispersion management method.It realizes 0.5～5mlength polarization maintaining fiber output while keeping pulse width less than 100 fs.The laser is successfully used in mini-T portable real-time terahertz spectrometer industrial product,of which spectral width coverage is 0.1～7THz,spectral resolution is 9GHz,and dynamic range is better than 70 dB.
As the pump source of producing broad band Terahertz,femtosecond fiber laser is the kernel component of the THz spectrum detection system,so the performance of the whole Terahertz spectrum detection system depends on the femtosecond fiber laser.To satisfy terahertz system requirement,a femtosecond fiber laser has been developed successfully,which also employs following methods:SESAM(Semiconductor Saturable Absorber Mirror)and NPE(Nonlinear Polarization Evolution)hybrid mode-lock method,high precision cavity dispersion management method.It realizes 0.5～5mlength polarization maintaining fiber output while keeping pulse width less than 100 fs.The laser is successfully used in mini-T portable real-time terahertz spectrometer industrial product,of which spectral width coverage is 0.1～7THz,spectral resolution is 9GHz,and dynamic range is better than 70 dB.
引文
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[9]Aguergaray C,Broderick N G,Erkintalo M,et al.Mode-locked femtosecond all-normal all-PM Yb-doped fiber laser using a nonlinear amplifying loop mirror[J].Optics Express,2012,20(10):10545.
[10]Park J,Park S,Kim S W,et al.Hybrid mode-locked Er-doped fiber femtosecond oscillator with 156mW output power[J].Optics Express,2012,20(14):15054-60.
[11]Turitsyn S K,Bale B G,Fedoruk M P.Dispersion-managed solitons in fibre systems and lasers[J].Physics Reports,2012,521(4):135-203.
[2]Kawase M,Saito T,Ogawa M,et al.Application of terahertz absorption spectroscopy to evaluation of aging variation of medicine.[J].Analytical Sciences the International Journal of the Japan Society for Analytical Chemistry,2011,27(2):209-212.
[3]Su K,Shen Y C,Zeitler J A.Terahertz Sensor for Non-Contact Thickness and Quality Measurement of Automobile Paints of Varying Complexity[J].IEEE Transactions on Terahertz Science&Technology,2014,4(4):432-439.
[4]Yinghao Yuan,Zheng Zhou.Design and application of mini-T series portable real-time terahertz spectrometer[J].Journal of Terahertz Science and Electronic Information Technology,2013,15(6):909-915.
[5]Yinghao Yuan,Chao Li.Automatic spectrum recognition by real-time terahertz spectrometer[J].The International Photonics and optoelectronics Meeting(ASA and ISST),2017,ASu5A.6.
[6]Dinghuan Deng,Li Zhan,Zhaochang Gu,et al.70-femtosecond Gaussian pulse generation in a dispersion-managed erbium-doped fibre laser[J].Journal of Modern Optics,2011,58(7):625-630.
[7]Kivist S,Puustinen J,Guina M,et al.Pulse dynamics of a passively mode-locked Bi-doped fiber laser[J].Optics Express,2010,18(2):1041-8.
[8]Erkintalo M,Aguergaray C,Runge A,et al.Environmentally stable all-PM all-fiber giant chirp oscillator.[J].Optics Express,2012,20(20):22669.
[9]Aguergaray C,Broderick N G,Erkintalo M,et al.Mode-locked femtosecond all-normal all-PM Yb-doped fiber laser using a nonlinear amplifying loop mirror[J].Optics Express,2012,20(10):10545.
[10]Park J,Park S,Kim S W,et al.Hybrid mode-locked Er-doped fiber femtosecond oscillator with 156mW output power[J].Optics Express,2012,20(14):15054-60.
[11]Turitsyn S K,Bale B G,Fedoruk M P.Dispersion-managed solitons in fibre systems and lasers[J].Physics Reports,2012,521(4):135-203.