Continuous-wave 148.4-nm generation in top-seeded solution-grown strontium tetraborate

@misc{wu2026continuouswave,
  title = {{Continuous-wave 148.4-nm generation in top-seeded solution-grown strontium tetraborate}},
  author = {Yanzhang Wu and Peng Yang and Lingfeng Yan and Qi Xiao and Jiahong Li and Juxian Li and Beichen Huang and Zhiwei Jiao and Shiqian Ding},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.06477},
  eprint = {2610.06477},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.06477},
}

TY  - UNPB
TI  - Continuous-wave 148.4-nm generation in top-seeded solution-grown strontium tetraborate
AU  - Yanzhang Wu
AU  - Peng Yang
AU  - Lingfeng Yan
AU  - Qi Xiao
AU  - Jiahong Li
AU  - Juxian Li
AU  - Beichen Huang
AU  - Zhiwei Jiao
AU  - Shiqian Ding
PY  - 2026
DA  - 2026/10/05
PB  - arXiv
DO  - 10.48550/arxiv.2610.06477
UR  - https://arxiv.org/abs/2610.06477
AB  - We report an implementation of continuous-wave (CW) vacuum-ultraviolet (VUV) generation at 148.4 nm by single-pass second-harmonic generation of 296.8 nm light in strontium tetraborate (SBO). At an incident fundamental power of approximately 580~mW, we estimate a VUV output power of approximately 1.7 nW at the crystal exit. The crystal is grown by the top-seeded solution growth method and operated in a helium-filled chamber. The quadratic power dependence observed under vacuum, together with its strong suppression in air, supports the identification of the generated second harmonic. We further characterize the dependence of the VUV signal on beam position, incidence angle, polarization, and crystal temperature, providing practical guidance for SBO-based CW VUV sources for nuclear spectroscopy and clock applications.
ER  -