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Variable repetition rate pulse power supply based on magnetic pulse compression for copper vapor lasers

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Abstract

The Magnetic Pulse Compression (MPC) system is a well-established method for generating high-peak-power, short-duration voltage pulses, commonly used in pulse power supplies (PPS). Traditionally designed for a fixed high repetition rate, this paper explores the techniques and outcomes of variable repetition rate operation in an MPC-based PPS used to excite a copper vapor laser (CVL). Specifically, the PPS, initially designed for 9 kHz operation, is tested at three different rates: 8 kHz, 9 kHz, and 10 kHz. A mathematical model is developed, and experimental modifications are presented in this paper. The study investigates the impact of repetition rate variations on CVL parameters, particularly phantom current (Phantom current: 47% at 8 kHz, 54% at 9 kHz, and 51% at 10 kHz). Phantom current reduces at 10 kHz due to improved impedance matching. At 8 kHz, the laser output is 24W, increases to 30W at 9 kHz and 43W at 10 kHz with a plane-plane resonator configuration. This trend extends to the master oscillator power amplifier (MOPA) at 10 kHz, resulting in a 50% increase in optical power output compared to 9 kHz. This improvement at 10 kHz applies to various parameters, including optical pulse characteristics, average power, electro-optic efficiency, energy per pulse, reduced jitter, and impedance matching.

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Acknowledgements

The authors wish to convey their sincere appreciation to Shri B Gangawane and Shri S Mandal for their technical support in pulse power supply modification. The authors would like to thank Shri S K Mishra for his support in the preparation of the CVL Laser head. Additionally, the authors extend their thanks to colleagues in the laser development section of the Advanced Tunable Laser Application Division for their collaborative efforts and insightful discussions, which significantly enriched this study.

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Authors and Affiliations

  1. Homi Bhabha National Institute, Anushaktinagar, Mumbai, India

    Dheeraj K. Singh, V. S. Rawat & Archana Sharma

  2. Beam Technology Development Group, Bhabha Atomic Research Centre, Mumbai, India

    Dheeraj K. Singh, A. Gupta, R. Vijayan, A. Nayak, V. S. Rawat, S. Kundu & Archana Sharma

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  1. Dheeraj K. Singh
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  2. A. Gupta
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  3. R. Vijayan
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  5. V. S. Rawat
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  6. S. Kundu
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  7. Archana Sharma
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Contributions

Dheeraj K Singh:—Conceptualization of idea, software, experiments and manuscript drafting A Gupta:—High repetition rate trigger development and experiments R Vijayan:—Resources and experiments A Nayak:—Experimental support V S Rawat:—Conceptualization of idea, manuscript review and supervision S Kundu:—Methodology and supervision Archana Sharma:—Idea and supervision.

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Correspondence to Dheeraj K. Singh.

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Singh, D.K., Gupta, A., Vijayan, R. et al. Variable repetition rate pulse power supply based on magnetic pulse compression for copper vapor lasers. Opt Quant Electron 56, 713 (2024). https://doi.org/10.1007/s11082-024-06380-0

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