Refractive index measurement by spectrally resolved interferometry using a femtosecond pulse laser

2007 ◽  
Vol 32 (6) ◽  
pp. 647 ◽  
Author(s):  
Ki-Nam Joo ◽  
Seung-Woo Kim
Keyword(s):  
Refractive Index ◽  
Pulse Laser ◽  
Femtosecond Pulse ◽  
Refractive Index Measurement ◽  
Femtosecond Pulse Laser ◽  
Index Measurement ◽  
Spectrally Resolved

scholarly journals Spectrally Resolved White Light Interferometry for NaCl Aqueous Solutions Refractive Index Measurement

2021 ◽  
Vol 9 ◽  
Author(s):  
Igor G. Likhachev ◽  
Vladimir I. Pustovoy ◽  
Boris A. Usievich
Keyword(s):  
Refractive Index ◽  
Refractive Indices ◽  
White Light Interferometry ◽  
Salt Solutions ◽  
Refractive Index Measurement ◽  
Low Concentrations ◽  
Index Measurement ◽  
Different Types ◽  
Spectral Detection ◽  
Spectrally Resolved

In this work, a technique for comparing refractive indices for solutions of low concentrations has been developed. The method of direct spectral detection developed by the authors has been using. The solutions of low and ultra-low NaCl concentrations were compared with each other, as well as with the respective water controls. The solutions were prepared using the method of serial dilution with different types of mixing at each step: conventional stirring or intensive shaking. Measurements were made for water solutions of NaCl subjected to 6–12 and 30 hundredfold dilution, as well as for water controls, i.e. water subjected to the same technological procedure as the tested salt solutions.

scholarly journals Development of a Temperature-Controlled Optical Planar Waveguide Sensor with Lossy Mode Resonance for Refractive Index Measurement

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 199
Author(s):  
Yu-Cheng Lin ◽  
Liang-Yü Chen
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Control ◽  
Planar Waveguide ◽  
Metallic Oxide ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Temperature Controlled ◽  
Optical Planar Waveguide ◽  
Active Temperature

The generation of lossy mode resonances (LMR) with a metallic oxide film deposited on an optical fiber has attracted the attention of many applications. However, an LMR-based optical fiber sensor is frangible, and therefore it does not allow control of the temperature and is not suited to mass production. This paper aims to develop a temperature-controlled lossy mode resonance (TC-LMR) sensor on an optical planar waveguide with an active temperature control function in which an ITO film is not only used as the LMR resonance but also to provide the heating function to achieve the benefits of compact size and active temperature control. A simple flat model about the heat transfer mechanism is proposed to determine the heating time constant for the applied voltages. The TC-LMR sensor is evaluated experimentally for refractive index measurement using a glycerol solution. The heating temperature functions relative to the controlled voltages for water and glycerol are obtained to verify the performance of the TC-LMR sensor. The TC-LMR sensor is a valuable sensing device that can be used in clinical testing and point of care for programming heating with precise temperature control.

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