@article{oai:repo.qst.go.jp:00084683,
 author = {Koji, Tamura and Ryuzo, Nakanishi and Hironori, Oba and Takunori, Taira and Ikuo, Wakaida and Koji, Tamura and Ryuzo, Nakanishi and Hironori, Oba},
 issue = {3},
 journal = {JJAP},
 month = {Apr},
 note = {Laser pulse energy and pulse build-up time were measured during gamma irradiation at a dose rate of 150 Gy/h to evaluate the radiation-induced effects on a laser remote inspection system using ceramics and single crystal micro-chip laser. Results showed a time-dependent decrease in pulse energy and increase in pulse build-up time during irradiation. Both effects were larger for ceramics than for single crystal due to the amount of generated optical loss. The behaviours of pulse energy and build-up time with the increase in optical loss in the gain medium were simulated using rate equation calculations. The radiation effect on build-up time was larger than that on pulse energy for both specimens. Therefore, build-up time measurement is highly sensitive and effective for the evaluation of radiation effect generated in laser medium, especially for radiation robust specimens or at low radiation dose rate.},
 title = {Radiation robustness of laser ceramics and single crystal for microchip laser remote analysis},
 volume = {61},
 year = {2022}
}