Optics and Photonics Society of Iran

Pumping poly methyl methacrylate (PMMA) films doped with azobenzene chromophore Disperse Red 1 (DR1) with two pump beams in two step, all-optical switching effects with very low background and high stability are demonstrated. For comparison, we used respectively the single linearly polarized beam (9 mW),linear–circular polarized beams (9mW and 4.9 mW) and two cross-linearly polarized beams (9 mW and 3.3 mW) to pump the film. High frequency switching is obtained, Because the experimental measurement and analysis showed that the turn off speed of the all-optical switching could be obviously increased by use of two pump beam method.