Chinese Optics Letters, Volume. 22, Issue 10, (2024)

Multiphonon-assisted acousto-optical Q-switched laser at 1130 nm in Yb:YCOB crystal [Early Posting]

Si Huichen, Liang Fei, Lu Dazhi, Yu Haohai, Zhang Huaijin, Wu Yicheng
Author Affiliations
  • 济南 山东大学晶体材料国家重点实验室
  • China
  • Shandong University Institute of Crystal Materials
  • 山东大学晶体材料国家重点实验室
  • Tianjin University of Technology School of Material Science and Engineering
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    In this letter, we realized the phonon-assisted Q-switched laser operation in Yb:YCOB crystal. Differing from previous laser wavelengths below 1.1 μm, we extended the wavelength to 1130 nm by amplifying multiphonon-assisted electronic transitions. At a repetition rate of 0.1 kHz, the laser output power was 82 mW with a pulse width of 466.1 ns, corresponding to a high peak power of 1.76 kW and a single pulse energy of 0.82 mJ, respectively. To the best of our knowledge, this represents the highest pulse energy among all Yb3+-doped crystal lasers at the wavelength beyond 1.1 μm. Such a large pulse energy could be explained by the laser rate-equation theory. These results indicated that electron-phonon coupling effect not only extends the lasing wavelengths, but also enables a fast temporal response to support nanosecond, picosecond, even femtosecond pulse laser operation.

    Paper Information

    Manuscript Accepted: Mar. 28, 2024

    Posted: May. 15, 2024

    DOI: COL-0191