Investigation of the Effect of Temperature Stabilization in Radiation–Heat Converters Based on a Strong Absorbing Coating

Natalia Sapogova,Nikita Bityurin,Andrey Afanasiev,Vladimir Bredikhin,Vladislav Kamensky

doi:10.3390/photonics8100423

Natalia Sapogova, Nikita Bityurin + Show 3 more

Open Access

https://doi.org/10.3390/photonics8100423

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Abstract

Light–heat converters are promising for further development of contact laser surgery. The simplest converter consists of an optical fiber with a strong absorbing layer at the tip. We studied the time dependence of the tip temperature at different CW laser powers and revealed that, in several seconds, the temperature evolution becomes almost power-independent. Mathematical modeling showed that laser ablation of the tip coating is the main reason for this phenomenon.

Highlights

An important aspect of oncosurgery efficiency is the choice of an adequate instrument for resection and the method of its application [1]
We report on the experimental observation of the effect of temperature stabilization in a stationary radiation–heat converter under atmospheric conditions, when the temperature of the heated layer no longer depends on the laser radiation power
The radiation–heat converter was supplied with diode laser radiation with powers in the range of 3–6 W

Summary

Introduction

An important aspect of oncosurgery efficiency is the choice of an adequate instrument for resection and the method of its application [1]. The selected instrument must comply with the principles of ablastic surgery and, on the other hand, it must allow the operation to be performed quickly enough not to worsen the possibility of further diagnostics of the surgical field. The size of the layer thermally damaged by the laser scalpel is important for creating a bloodless incision. The size of the incision depends on the laser resection technique, on the radiation parameters, on the angle of inclination of the scalpel to the surface, etc. Minimization of surgical trauma determines the degree of preservation of the organ function and, thereby, the level of the patient’s quality of life; the degree of radical removal of the tumor determines the absence of continued growth and/or a relapse of the process

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