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Photonics
Volume 13
Issue 2
10.3390/photonics13020118
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Dispersion Analysis and Control in a Yb-Doped Fiber Chirped Pulse Amplification System and Second-Harmonic Generation

by
Zhengying You
1,2,
Qian Wang
1,2,
Yuanyuan Fan
1,2,*,
Yifan Zhao
1,2,
Yan Qi
1,2,
Boxia Yan
1,2,
Ning Wen
1,2,
Zhe Han
1,2,
Mi Zhou
1,2 and
Yanwei Wang
1,2
1
Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Photonics 2026, 13(2), 118; https://doi.org/10.3390/photonics13020118
Submission received: 24 December 2025 / Revised: 10 January 2026 / Accepted: 12 January 2026 / Published: 27 January 2026
(This article belongs to the Special Issue Advanced Lasers and Their Applications, 3rd Edition)
Versions Notes

Abstract

We report a dispersion-controlled Yb-doped fiber chirped pulse amplification (CPA) system incorporating a tunable chirped fiber Bragg grating (CFBG) stretcher and a single-grating transmission compressor for dynamic compensation of power-dependent nonlinear effect. During the pulse amplification, the CFBG introduces adjustable third-order dispersion (TOD). By tuning the initial TOD provided by CFBG from −0.1965 ps³ at 2.37 W to −0.1791 ps³ at 9.65 W, residual TOD is efficiently compensated with the power-dependent nonlinear effect. As a result, by optimizing the dispersion balance at each output power, nearly constant femtosecond pulses with a duration of 250 fs are obtained over the entire power range, confirming effective control of nonlinear and dispersive effects in the amplification. The high-quality 1030 nm pulses enable efficient second-harmonic generation (SHG) in a type-I BBO crystal, producing 3.56 W femtosecond output at around 515 nm with a pulse duration of 190 fs, close to the Fourier transform limit. These results demonstrate a robust approach to generating high-power and temporal coherent ultrafast pulses suitable for precision micromachining and two-photon polymerization.
Keywords: chirped pulse amplification; Yb-doped fiber; femtosecond laser; optical harmonic generation chirped pulse amplification; Yb-doped fiber; femtosecond laser; optical harmonic generation

Share and Cite

MDPI and ACS Style

You, Z.; Wang, Q.; Fan, Y.; Zhao, Y.; Qi, Y.; Yan, B.; Wen, N.; Han, Z.; Zhou, M.; Wang, Y. Dispersion Analysis and Control in a Yb-Doped Fiber Chirped Pulse Amplification System and Second-Harmonic Generation. Photonics 2026, 13, 118. https://doi.org/10.3390/photonics13020118

AMA Style

You Z, Wang Q, Fan Y, Zhao Y, Qi Y, Yan B, Wen N, Han Z, Zhou M, Wang Y. Dispersion Analysis and Control in a Yb-Doped Fiber Chirped Pulse Amplification System and Second-Harmonic Generation. Photonics. 2026; 13(2):118. https://doi.org/10.3390/photonics13020118

Chicago/Turabian Style

You, Zhengying, Qian Wang, Yuanyuan Fan, Yifan Zhao, Yan Qi, Boxia Yan, Ning Wen, Zhe Han, Mi Zhou, and Yanwei Wang. 2026. "Dispersion Analysis and Control in a Yb-Doped Fiber Chirped Pulse Amplification System and Second-Harmonic Generation" Photonics 13, no. 2: 118. https://doi.org/10.3390/photonics13020118

APA Style

You, Z., Wang, Q., Fan, Y., Zhao, Y., Qi, Y., Yan, B., Wen, N., Han, Z., Zhou, M., & Wang, Y. (2026). Dispersion Analysis and Control in a Yb-Doped Fiber Chirped Pulse Amplification System and Second-Harmonic Generation. Photonics, 13(2), 118. https://doi.org/10.3390/photonics13020118

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