High-resolution slow-light fiber Bragg grating temperature sensor with phase-sensitive detection

Optics Letters
Arushi AroraMichel J F Digonnet

Abstract

This Letter reports a slow-light fiber Bragg grating (FBG) temperature sensor with a record temperature resolution of ∼0.3  m°C/√Hz, a drift of only ∼1  m°C over the typical duration of a measurement (∼30  s), and negligible self-heating. This sensor is particularly useful for applications requiring the detection of very small temperature changes, such as radiation-balanced lasers and the measurement of small absorptive losses using calorimetry. The sensor performance is demonstrated by measuring the heat generated in a pumped Yb-doped fiber. The sensor is also used to measure the slow-light FBG's very weak internal absorption loss (0.02  m-1), which is found to be only ∼2% of the total loss.

References

Aug 12, 2005·Optics Letters·Jong H ChowIan C M Littler
Oct 24, 2013·Optics Express·Elton Soares de Lima FilhoRaman Kashyap
Jul 1, 2014·Optics Letters·George SkolianosMichel J F Digonnet

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Citations

Jan 24, 2020·The Analyst·Chen Chen, Junsheng Wang
Jul 16, 2020·Optics Letters·Jennifer KnallMichel J F Digonnet
Jun 2, 2020·Optics Letters·Pierre-Baptiste VigneronMichel J F Digonnet
Feb 29, 2020·Optics Letters·Jennifer KnallMichel J F Digonnet
May 2, 2019·Optics Letters·Jennifer KnallMichel J F Digonnet
Dec 10, 2020·Sensors·David Pallarés-AldeiturriagaJosé Miguel López-Higuera

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