Effect of Changing the Time Delay on Absorption Coefficient of (rhodamine 6G) Dye Utilizing Laser Probe Technique

This study used a diode laser emitting light at a 650 nm wavelength. A continuous-wave laser was converted into a pulsed laser through a PWM circuit. A solution of Rhodamine 6G (Rh6G) laser dye was prepared by dissolving the dye in distilled water at a concentration of 10^− 4 M. The setup included components such as a beam splitter, mirrors, a motorized delay stage, and a spectrometer to analyze the spectrum emitted by the dye laser and transmitted via an optical fiber. An exploration was conducted to understand how the time delay impacts the absorption coefficient of the laser dye. The results demonstrated a relationship between time delay and absorption, and pulse width changes in the input power affected the sample response. The absorption coefficient can vary nonlinearly based on pulse changes. These data illustrate how energy is focused on the sample over different durations. Adjusting the time delay can influence the absorption coefficient, indicating how the time delay affects the dynamics and interactions directly or indirectly.

These results confirm the importance of interactions between samples and variations in concentration on the absorption coefficient.