Polarization control in a He-Ne laser using birefringence feedback.

摘要: The polarization dynamics of laser subjected to weak optical feedback from birefringence external cavity are studied theoretically and experimentally. It is found that flipping with hysteresis induced by feedback, the intensities two eigenstates both modulated length. variations loop duty ratios in one period intensity modulation phase differences element observed. When difference π/2, will equally alternatively oscillate, width smallest.