Radiation hardness of open Fabry-Pérot microcavities.
Opt Express
; 32(10): 17189-17196, 2024 May 06.
Article
en En
| MEDLINE
| ID: mdl-38858908
ABSTRACT
High-finesse microcavities offer a platform for compact, high-precision sensing by employing high-reflectivity, low-loss mirrors to create effective optical path lengths that are orders of magnitude larger than the device geometry. Here, we investigate the radiation hardness of Fabry-Pérot microcavities formed from dielectric mirrors deposited on the tips of optical fibers. The microcavities are irradiated under both conventional (â¼ 0.1 Gy/s) and ultrahigh (FLASH, â¼ 20 Gy/s) radiotherapy dose rates. Within our measurement sensitivity of â¼ 40 ppm loss, we observe no degradation in the mirror absorption after irradiation with over 300 Gy accumulated dose. This result highlights the excellent radiation hardness of the dielectric mirrors forming the cavities, enabling new optics-based, real-time, in-vivo, tissue-equivalent radiation dosimeters with â¼ 10 micron spatial resolution (our motivation), as well as other applications in high-radiation environments.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2024
Tipo del documento:
Article
Pais de publicación:
Estados Unidos