Design and Fabrication of Fbg Temperature Sensor with Cost-Effective Interrogation Schemes and Different Sensing Probes
Temperature is a widely monitored physical parameter in science and industry. In this research article, a fiber Bragg grating (FBG)-based temperature sensor is designed, developed and demonstrated with different geometries of sensing probes and cost-effective demodulation schemes. Three types of sensing probes have been designed and experimentally tested for easy and robust temperature sensing. Responses of the devised sensing probes are interrogated by optical spectrum analyzer (OSA) as and an indigenously developed cost-effective intensity demodulator. A linear red shift is observed in the Bragg wavelength with increase in the temperature from 27 oC to 96 oC for FBGs arranged in all three sensing probes. Temperature sensitivities of the probes found to be in range 11.570±0.123 pm/ oC to 12.940±0.154 pm/ oC. A good repeatability and negligible hysteresis is observed with deviation of 1 to 3 oC for all sensing probes. Thermal grease coating is applied to the FBGs encapsulated in sensing probes which resulted 1.4 times enhancement in their temperature sensitivities. A low cost twin FBGs intensity demodulation technique with working range 33-45.4 oC is also developed and demonstrated. For enhancement of the temperature detection range, the reference FBG is replaced by a chirped FBG (CFBG) with a large window of the reflection wavelengths (1545-1555 nm). Application of CFBG as a reference offers a wide temperature detection range from 27 o C to 256.56 oC with resolution of ±1 oC due to its large linear rising edge of width 2.98 nm
Year of publication: |
[2022]
|
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Authors: | Mehmood Khan, Raja Yasir ; Ullah, Rahim |
Publisher: |
[S.l.] : SSRN |
Saved in:
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