160 ps Yb:YAG/Cr:YAG microchip laser
Xiaoyang Guo, Koichi Hamamoto, Shigeki Tokita, Junji Kawanaka

TL;DR
Cryogenic cooling of Yb:YAG/Cr:YAG microchip lasers enables sub-200 ps pulse durations, with a demonstrated 160.6 ps pulse, surpassing previous room-temperature limits and opening new possibilities for ultrafast laser applications.
Contribution
This work demonstrates the first sub-200 ps pulse operation of Yb:YAG/Cr:YAG microchip lasers achieved through cryogenic cooling, surpassing previous room-temperature performance limits.
Findings
Achieved 160.6 ps pulse duration at cryogenic temperatures.
First demonstration of sub-200 ps pulses in Yb:YAG/Cr:YAG microchip lasers.
Cryogenic cooling breaks through damage limits at room temperature.
Abstract
By cryogenically cooling the Yb:YAG/Cr:YAG medium, one can break through the damage limit of Yb:YAG/Cr:YAG passively Q-switched microchip lasers at room temperature and thus achieve a shorter minimum pulse duration. In the proof of principle experiment we carried out, a 160.6 ps pulse duration was obtained. To the best of our knowledge, this is the first realization of sub-200 ps pulse operation for an Yb:YAG/Cr:YAG microchip laser
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