07 اسفند 1402
ابراهيم محمدي منش

ابراهیم محمدی منش

مرتبه علمی: دانشیار
نشانی: ملایر- کیلومتر 4 جاده اراک- پردیس دانشگاه ملایر- دانشکده علوم- گروه فیزیک
تحصیلات: دکترای تخصصی / فیزیک
تلفن: 081-32355404
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Investigation of the effect of temperature on opto‑thermal parameters of glycerol and ethylene glycol using laser thermal lens spectroscopy
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Photothermal effect · Thermal diffusivity · Thermal Conductivity · Thermooptic coefficient · Laser thermal lens spectroscopy
سال
2023
مجله OPTICAL AND QUANTUM ELECTRONICS
پژوهشگران ابراهیم محمدی منش ، محمدرضا محبی فر

چکیده

One of the important applications of the photothermal effect is laser thermal lens spectroscopy. Using this technique, some opto-thermal parameters of materials such as thermal diffusivity, thermo-optic coefficient (TOC), thermal conductivity, etc. can be accurately measured. In this experimental study the thermal diffusivity of butanol and propanol were measured. The accuracy of our experimental setup was confirmed by comparing with the reference. Then, the experiments were repeated for glycerol and ethylene glycol and measured the thermal diffusivity and thermal conductivity of these samples. A reliable agreement between these results and reference values was observed. Finally, thermal conductivity of glycerol and ethylene glycol at various temperatures was studied. These results show that thermal conductivity increases (from 0.2805 to 0.2865 W/mK for glycerol and from 0.246 to 0.275 W/mK for ethylene glycol) with increasing temperature (from 25 to 90 °C). Also, TOC and dn/dQ of these samples were measured at the beam waist of 30±0.3 µm and laser power of 100 mW.