Direct generation of ultrashort pulse sequence by optical parametric process

Wang Wenhao; Zhou Bingjie; Zhang Yanfang; Wang Jing; Ma Jingui; Zhang Hao; Qian Liejia

doi:10.11884/HPLPB202335.230069

Volume 35 Issue 9

Sep. 2023

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Wang Wenhao, Zhou Bingjie, Zhang Yanfang, et al. Direct generation of ultrashort pulse sequence by optical parametric process[J]. High Power Laser and Particle Beams, 2023, 35: 091005. doi: 10.11884/HPLPB202335.230069

Citation:

Wang Wenhao, Zhou Bingjie, Zhang Yanfang, et al. Direct generation of ultrashort pulse sequence by optical parametric process[J]. High Power Laser and Particle Beams, 2023, 35: 091005. doi: 10.11884/HPLPB202335.230069

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Direct generation of ultrashort pulse sequence by optical parametric process

doi: 10.11884/HPLPB202335.230069

1.
School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2.
Shanghai Radio Equipment Research Institute, Shanghai 201109, China
3.
Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
4.
Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China

Received Date: 2023-03-31
Accepted Date: 2023-07-10
Rev Recd Date: 2023-06-13

Available Online: 2023-07-13

Publish Date: 2023-09-15

Abstract

Abstract

This paper demonstrates that the single crystal optical parametric amplification process (OPA) satisfies spectral parity-time (PT) anti-symmetry under specific boundary conditions, and the PT symmetry threshold point exhibits a gain jump property. For an OPA with phase mismatch, the PT symmetry of the system can be controlled by instantaneous adjustment of the pump intensity. Based on this property, this paper constructs an ultrafast optical switch, which can combine with amplitude modulated pump to directly convert continuous laser into an ultrashort output pulse sequence. On the other hand, the optical switch can be used for further pulse compression and is promising to be used as an ultrashort mid-infrared seed source. The proposed scheme is easy to directly generate ultrashort pulse sequence with repetition rate higher than 10 GHz because the optical resonant cavity is not required.
- quadratic nonlinear optics,
- optical parametric amplification,
- ultrashort pulse sequence,
- non-Hermitian Hamiltonian,
- spectral parity-time anti-symmetry

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References(20)

References

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