Intensity Fluctuation Suppression in Injection — Locked Dye Ring Laser

Abstract

Investigations of abnormal properties inherent in laser radiation have always been of great interest for physicists. The injection — locked dye ring laser fluctuation behavior is an excellent opportunity instant for studying these properties and is manifested in more detail when the weak signal intensity I₀ reaches the critical intensity value I_c (the bifurcation point). The maximum suppression of intensity fluctuation is considered to demonstrate the laser abnormal character. Since the spectral characteristics are described for a sufficiently high value of the pumping parameter the color noise is negligible [1,2]. The analisis of the laser fluctuation properties for long statistical times shows the dependence of the wave intensity correlation function on the drive parameter for the laser under consideration and the dye ring laser with different wave pumping parameters p] to be the same. The coincidence of the results is due to similarity of the distribution functions having two maxima in both cases. The signal injection leads to the increased value of maximum corresponding to the running wave mode and to the decreased value of the peak for the counterpropagating wave operation. For both types of lasers the higher peak determines the fluctuation characteristics at long statistical times.