Design of a 10 W Level Dispersion-Managed High-Power Ultrafast Mid-Infrared Fiber Laser System

Weiyi Sun; Jiapeng Huang; Liming Chen; Zhiyuan Huang; Wenbin He; Xin Jiang; Meng Pang; Yuxin Leng

doi:10.3788/CJL202249.0101012

Chinese Journal of Lasers, Volume. 49, Issue 1, 0101012(2022)

Design of a 10 W Level Dispersion-Managed High-Power Ultrafast Mid-Infrared Fiber Laser System

Weiyi Sun^1,5, Jiapeng Huang^1,2,4、*, Liming Chen², Zhiyuan Huang¹, Wenbin He², Xin Jiang^2,3, Meng Pang^1,2,3、**, and Yuxin Leng^1,3、***

Author Affiliations

¹State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

²Innovation and Integration Center of New Laser Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

³School of Physics and Opto-Electronic Engineering, Hangzhou Institute for Advanced Study, Chinese Academy of Sciences, Hangzhou, Zhejiang 310013, China;

⁴Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China;

⁵School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China

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Figures & Tables(10)

Fig. 1. Design of high-power ultrafast fiber laser system at 2.8 μm using dispersion-management and CPA techniques

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Fig. 2. Wave shape transformation of the pulse in time domain and frequency domain in seed oscillator. (a) Time and (b) frequency domain wave shapes of input Gaussian pulse; (c) time (top) and frequency (below) transformation; 　　(d)time and (e) frequency domain wave shapes of output pulse

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Fig. 3. After forming a stable pulse in seed oscillator cavity, transmission process of a single round pulse in time and frequency domain and pulse widths. (a) Transformation process of pulse shape and spectral shape；(b)the largest 　　pulse width; (c) the smallest pulse width

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Fig. 4. Output pulse from the pre-amplifier. (a) Pulse shape；(b) pulse spectrum；(c) transformation process in time and frequency domain

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Fig. 5. Output pulse in the main amplifier without compressor when positive chirp provided by pulse stretcher is balanced by negative chirp provided by gain fiber. (a) Pulse shape；(b) pulse spectrum；(c) transformation process in time and frequency domain

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Fig. 6. Change of fiber output pulse width and the proportion of central pulse energy with normal dispersion provided by stretcher

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Fig. 7. Output pulse in the main amplifier with two different groups dispersion values

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Table 1. Parameters in the simulation of seed oscillator
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Table 1. Parameters in the simulation of seed oscillator
Device Length /m β₂ /(ps²·km^－1) β₃ /(ps³·km^－1) γ /(W^－1·km^－1) Core diameter /μm Concentration
Fiber 4 －83.5 0.64 0.24 15 0.07
Stretcher 1 415 －3.37 0

Table 2. Parameters in the simulation of per-amplifier
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Table 2. Parameters in the simulation of per-amplifier
Device Length / m β₂ / (ps²·km^－1) β₃ / (ps³·km^－1) γ / (W^－1·km^－1)
Fiber 5.5 －83.5 0.64 0.24
Stretcher 1 800 －6.5 0

Table 3. Two different groups of parameters of main amplifier chosen for the simulation
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Table 3. Two different groups of parameters of main amplifier chosen for the simulation
Device GDD /ps² β₂/(ps²·km^－1) β₃/(ps³·km^－1)
Stretcher ＋0.730 850 －6.91
Compressor －120 0.98
Stretcher ＋0.632 1250 －10.16
Compressor －618 5.02

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Weiyi Sun, Jiapeng Huang, Liming Chen, Zhiyuan Huang, Wenbin He, Xin Jiang, Meng Pang, Yuxin Leng. Design of a 10 W Level Dispersion-Managed High-Power Ultrafast Mid-Infrared Fiber Laser System[J]. Chinese Journal of Lasers, 2022, 49(1): 0101012

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