High-Sensitivity Whispering Gallery Mode Humidity Sensor Based on Glycerol Microdroplet Volumetric Expansion

High-Sensitivity Whispering Gallery Mode Humidity Sensor Based on Glycerol Microdroplet Volumetric Expansion

We demonstrate a highly sensitive whispering gallery mode (WGM) relative humidity (RH) sensor based on a glycerol microdroplet. WGMs were excited using a 760 nm tunable semiconductor laser. We used free space coupling, which is effective when using a liquid resonator. A detailed analysis of differen...

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Bibliographic Details
Main Authors: Pauls Kristaps Reinis, Lase Milgrave, Kristians Draguns, Inga Brice, Janis Alnis, Aigars Atvars
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Sensors
Subjects:
whispering gallery mode
humidity sensor
microsphere resonator
glycerol
tunable laser
Online Access:https://www.mdpi.com/1424-8220/21/5/1746

Internet

https://www.mdpi.com/1424-8220/21/5/1746

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