Versatile luminescence thermometry via intense green defect emission from an infrared-pumped fluorosilicate optical fiber.
Appl Opt
; 63(16): 4234-4244, 2024 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-38856598
ABSTRACT
An all-glass optical fiber capable of two distinct methods of optical thermometry is described. Specifically, a silica-clad, barium fluorosilicate glass core fiber, when pumped in the infrared, exhibits visibly intense green defect luminescence whose intensity and upper-state lifetime are strong functions of temperature. Intensity-based optical thermometry over the range from 25°C to 130°C is demonstrated, while a lifetime-based temperature sensitivity is shown from 25°C to 100°C. Time-domain measurements yield a relative sensitivity of 2.85% K -1 at 373 K (100°C). A proof-of-concept distributed sensor system using a commercial digital single-lens reflex camera is presented, resulting in a measured maximum relative sensitivity of 1.13% K -1 at 368 K (95°C). The sensing system described herein stands as a new blueprint for defect-based luminescence thermometry that takes advantage of pre-existing and relatively inexpensive optical components, and allows for the use of standard cameras or simply direct human observation.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Appl Opt
Ano de publicação:
2024
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Article