Laser heating of an optical fiber

Area of Science:

• Materials Science
• Optical Engineering
• Thermal Physics

Background:

• Accurate absorption measurements are critical for evaluating low-attenuation glass fibers.
• Understanding thermal effects is essential for precise optical measurements.
• Laser heating introduces dynamic temperature variations that must be quantified.

Purpose of the Study:

• To calculate the periodic temperature rise on the surface of a glass cylinder.
• To determine the mean and peak-to-peak temperatures under chopped laser heating.
• To provide parameters for optimizing absorption measurements in glass fibers.

Main Methods:

• Analytical calculation of surface temperature distribution.
• Modeling heat transfer in a glass cylinder subjected to periodic laser irradiation.
• Derivation of formulas for mean and peak-to-peak surface temperatures.

Main Results:

• The study provides a method to calculate the periodic temperature rise at the glass surface.
• Formulas for mean temperature (operating point) and peak-to-peak temperature (measurement sensitivity) are derived.
• The results are applicable to experiments using chopped laser beams for heating.

Conclusions:

• The calculated temperature parameters are crucial for designing and interpreting absorption measurements in low-attenuation glass fibers.
• This work offers a theoretical basis for optimizing experimental conditions to enhance measurement sensitivity.
• The findings contribute to the precise characterization of optical fiber materials.