Cascaded plastic optical fiber based SPR sensor for simultaneous measurement of refractive index and temperature.
Biomed Opt Express
; 15(2): 793-801, 2024 Feb 01.
Article
en En
| MEDLINE
| ID: mdl-38404343
ABSTRACT
A cascaded side-polish plastic optical fiber (POF) and FONTEX optical fiber based surface plasmon resonance (SPR) sensor is proposed for simultaneous measurement of refractive index (RI) and temperature. The side-polish POF and FONTEX optical fiber are connected by using the UV glue in a Teflon plastic tube. The SPR phenomenon can be excited at both of the side-polish region and the FONTEX fiber cladding. The polydimethylsiloxane (PDMS) is coated on the side-polish POF to get a temperature sensing channel. Due to the low RI sensitivity of the FONTEX optical fiber, the cascaded fiber sensor can obtain a broader RI measurement range with a low crosstalk. An RI sensitivity of 700â
nm/RIU in the RI measurement range of 1.335-1.39 and a temperature sensitivity of -1.02â
nm/°C measured in deionized water with a range of 20-60 °C are obtained. In addition, the cascaded POF based SPR sensor has potential application prospects in the field of biochemical sensing.
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MEDLINE
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En
Revista:
Biomed Opt Express
Año:
2024
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Article
País de afiliación:
China