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<p>In this work, we studied thermal blooming phenomena using a CW laser with a wavelength of 405&#xa0;nm and an optical power of 100 mW focused on a quartz cuvette containing dye solution with different types of nanoparticles to generate thermocavitation. We observed that self-phase modulation (SPM) typical far-field loops suddenly shifted into a completely different diffraction pattern when the dye solution was heated beyond the self-phase modulation (SPM) using a focused laser beam. After SPM, this process, known as thermal blooming (TB), can be considered the next phase. In addition, we observed the effect of (Ag NWs, Fe₂O₃, and AgNWs: Fe₂O₃) NPs on the speed of bubble formation and their number. also observed random laser actions in both the presence and absence of thermal cavitation. The presence of a thermal cavity was found to have a significant impact on the pump threshold, spectral linewidth, and intensity of emission spectra.</p>

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Red Random Laser Based on Thermocavitation : Synthesis and Characterization

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Jassim Mohammed Jassim,
  • Majid F. Haddawi,
  • M. J. Mohammed,
  • S. M. Hamidi

摘要

In this work, we studied thermal blooming phenomena using a CW laser with a wavelength of 405 nm and an optical power of 100 mW focused on a quartz cuvette containing dye solution with different types of nanoparticles to generate thermocavitation. We observed that self-phase modulation (SPM) typical far-field loops suddenly shifted into a completely different diffraction pattern when the dye solution was heated beyond the self-phase modulation (SPM) using a focused laser beam. After SPM, this process, known as thermal blooming (TB), can be considered the next phase. In addition, we observed the effect of (Ag NWs, Fe₂O₃, and AgNWs: Fe₂O₃) NPs on the speed of bubble formation and their number. also observed random laser actions in both the presence and absence of thermal cavitation. The presence of a thermal cavity was found to have a significant impact on the pump threshold, spectral linewidth, and intensity of emission spectra.