Behaviors of multiple pulsing in high power saturable-absorber mode-locked Yb:KGW laser

By investigating the mode-locked pulse characteristics with varying pump power, we report on the soliton pulse breakup and multiple pulsing of a high power femtosecond Yb:KGW laser at a 10 W level of output power. The pulse breakup from single to double pulses at an output power of 6.3 W, exhibits a...

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Bibliographic Details
Published in:Optics communications 2023-01, Vol.527, p.128968, Article 128968
Main Authors: Park, Byeong-Jun, Song, Ji-Yeon, Lee, Seong-Yeon, Kim, Doh-Yoon, Jeon, Min Yong, Yee, Ki-Ju
Format: Article
Language:English
Subjects:
Femtosecond laser
Multiple pulsing
Soliton
Yb:KGW
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Summary:By investigating the mode-locked pulse characteristics with varying pump power, we report on the soliton pulse breakup and multiple pulsing of a high power femtosecond Yb:KGW laser at a 10 W level of output power. The pulse breakup from single to double pulses at an output power of 6.3 W, exhibits a step-like abrupt change in the spectrum and temporal duration. Even under multiple pulsing operation, the mode-locked pulses follow the soliton-like pulse formation model such that the pulse duration is inversely proportional to the pulse energy and the time-bandwidth product is close to the transform limit. The multiple pulsing and breakup characterized in this study provide an efficient and reliable method to confirm the single pulse operation of high power mode-locked solid-state lasers. •Multiple pulses are easily generated in high-power mode-locked lasers.•Pulse breaking accompanies abrupt change in the spectrum and the pulse duration.•Soliton pulse formation model is valid for multiple pulses.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2022.128968