Study on broadband low-temporal-coherence optical parametric amplification based on 58% deuterated DKDP crystal

Xu Hao; Zhao Xiaohui; Wang Tao; Zhang Tianxiong; He Ruijing; Liu Dong; Ji Lailin; Feng Wei; Cui Yong; Gao Yanqi; Sui Zhan

doi:10.11884/HPLPB202537.250065

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Xu Hao, Zhao Xiaohui, Wang Tao, et al. Study on broadband low-temporal-coherence optical parametric amplification based on 58% deuterated DKDP crystal[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250065

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Xu Hao, Zhao Xiaohui, Wang Tao, et al. Study on broadband low-temporal-coherence optical parametric amplification based on 58% deuterated DKDP crystal[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250065

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Study on broadband low-temporal-coherence optical parametric amplification based on 58% deuterated DKDP crystal

doi: 10.11884/HPLPB202537.250065

Shanghai Institute of Laser Plasma, CAEP, Shanghai 201800, China

Received Date: 2025-04-07
Accepted Date: 2025-05-16
Rev Recd Date: 2025-06-16

Available Online: 2025-07-05

Abstract

Abstract

As a new type of laser driver to suppress laser plasma instability, the low-coherence laser driver holds significant research value in the field of laser inertial confinement fusion. To achieve large-bandwidth and high-power low-coherence pulse parametric amplification, this study provides a detailed analysis of the parametric matching characteristics of DKDP crystals with varying deuteration rates under Type-I colinear phase matching conditions. The fundamental parameters, including phase-matching angles, walk-off angles, and parametric bandwidths, are determined. The theoretical parameter bandwidth of the 58% deuterium-doped DKDP crystal is 180 nm. On this basis, a design for broadband low-temporal-coherence optical parametric amplification based on 58%DKDP crystals is proposed, and the theoretical model and the corresponding numerical model are established by the three-wave coupled equations. Furthermore, an experimental investigation of parametric amplification based on 58%-deuterium-doped DKDP crystals is conducted. The center wavelength of the broadband low-coherence signal light is set at 1053 nm, while the pump wavelength is fixed at 532 nm. The spectral width is 40 nm with a gain factor of 2.1. The results show that 58% DKDP crystal has a large gain bandwidth, and combined with the colinear phase-matching method, such crystals are expected to enable large-bandwidth and high-gain amplification of low-coherence light.
- optical parametric amplification,
- collinear phase-matching,
- broadband low-temporal-coherence light,
- potassium deuterium phosphate crystal,
- nonlinear optics

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References(16)

References

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