Improved retroreflection method for measuring the refractive index of liquids

Area of Science:

• Optics and Photonics
• Analytical Chemistry
• Materials Science

Background:

• Accurate measurement of liquid refractive index is crucial for various scientific and industrial applications.
• Existing methods may face limitations in precision, stability, or repeatability.
• Optical fiber sensing offers potential for novel high-precision measurement techniques.

Purpose of the Study:

• To introduce a novel, high-precision method for measuring the refractive index of liquids.
• To demonstrate the method's efficacy using sugar solutions under varied conditions.
• To investigate the concentration and temperature dependence of the refractive index for sugar solutions.

Main Methods:

• Utilizing the optical fiber end face as the sensing interface for refractive index measurement.
• Conducting multiple experimental trials with sugar solutions to assess performance.
• Systematically varying concentration and temperature to study their effects on refractive index.

Main Results:

• The proposed optical fiber method achieves high precision in refractive index measurements.
• The technique exhibits excellent stability and repeatability across multiple measurements.
• Experimental data reveals the specific relationship between sugar solution concentration, temperature, and refractive index.

Conclusions:

• The optical fiber end face method is a reliable and precise tool for liquid refractive index determination.
• This method provides significant advantages in terms of stability and repeatability over traditional techniques.
• The study successfully characterized the refractive index behavior of sugar solutions, offering valuable data for related applications.