Optical amplification in organic dye-doped polymeric channel waveguide under CW optical pumping

We have achieved amplified spontaneous emission and optical amplification in an organic dye-doped polymeric waveguide using a cw pumping source. By fabricating a channel waveguide structure, amplified spontaneous emission was found under long-pulse (0.3-4.1 ms) optical pumping with 120 mW amplitude from the waveguide end face. The optical gain for externally input 770 nm light was measured to be 13.8 dB at an optical pumping duty of 8%. The experimental results reveal that the optical pumping scheme presented here is a very effective means for attaining real cw-stimulated emission in organic materials.