260 fs, 403 W coherently combined fiber laser with precise high-order dispersion management

doi:10.1007/s12200-024-00107-5

Front. Optoelectron.

2024, Vol. 17

Issue (1) : 3 https://doi.org/10.1007/s12200-024-00107-5

260 fs, 403 W coherently combined fiber laser with precise high-order dispersion management

Shuangxi Peng¹, Zhihao Wang¹, Feilong Hu¹, Zhengyan Li², Qingbin Zhang^1,³(

), Peixiang Lu^1,³

¹. Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
². School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
³. Optics Valley Laboratory, Wuhan 430074, China

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Abstract

An ultrafast fiber laser system comprising two coherently combined amplifier channels is reported. Within this system, each channel incorporates a rod-type fiber power amplifier, with individual operations reaching approximately 233 W. The active-locking of these coherently combined channels, followed by compression using gratings, yields an output with a pulse energy of 504 µJ and an average power of 403 W. Exceptional stability is maintained, with a 0.3% root mean square (RMS) deviation and a beam quality factor M² < 1.2. Notably, precise dispersion management of the front-end seed light effectively compensates for the accumulated high-order dispersion in subsequent amplification stages. This strategic approach results in a significant reduction in the final output pulse duration for the coherently combined laser beam, reducing it from 488 to 260 fs after the gratings compressor, while concurrently enhancing the energy of the primary peak from 65% to 92%.

Keywords Fiber lasers amplifier Power scaling Coherent beam combination Dispersion compensation

Corresponding Author(s): Qingbin Zhang

Issue Date: 24 January 2024

Cite this article:

Shuangxi Peng,Zhihao Wang,Feilong Hu, et al. 260 fs, 403 W coherently combined fiber laser with precise high-order dispersion management[J]. Front. Optoelectron., 2024, 17(1): 3.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-024-00107-5
https://academic.hep.com.cn/foe/EN/Y2024/V17/I1/3

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