High-Resolution Seawater Salinity Sensor Based on Temperature Self-Compensating Optical Interferometer
Xin Wang, Xiaoxue Bai, Muzi Zhang, Chi Wu
Abstract
A high-resolution seawater salinity sensor, based on a temperature self-compensating resonator, has been developed, which accommodates simultaneous temperature variations in both the reference and sensing arms. The impact of external temperature fluctuations on the optical components affecting the optical path difference is significantly reduced, and a salinity sensitivity of 145 pm/Practical Salinity Unit (PSU) and a salinity resolution of 0.0003 PSU are achieved. The sensor uses a structure that converts optical rays into spatial light, achieving noncontact measurements which are potentially pivotal for various applications in oceanography and marine studies.
Topics & Concepts
SeawaterSalinityInterferometryTemperature salinity diagramsImage resolutionTemperature measurementSensitivity (control systems)Materials scienceEnvironmental scienceRemote sensingOptical path lengthResolution (logic)Optical pathOpticsPhysicsOceanographyGeologyElectronic engineeringComputer scienceEngineeringQuantum mechanicsArtificial intelligenceAnalytical Chemistry and SensorsWater Quality Monitoring TechnologiesUnderwater Vehicles and Communication Systems