| 摘要 |
PURPOSE:To obtain an effective nonlinear optical element by forming a core part having the refractive index higher than the refractive index of a clad to <=100mum diameter. CONSTITUTION:The core part 1 having the refractive index higher than the refractive index of the clad of a plastic optical fiber having the core 1 consisting of a synthetic high-polymer material and the clad 2 is formed to <=100mum diameter. An org. material having large nonlinear sensitivities beta, gamma is dispersed into the synthetic high-polymer material of the core part or is incorporated into the repeating unit of the synthetic high-polymer in the core part. The org. material having the large nonlinear sensitivities beta, gamma refer to an arom. compd., incorporated with a long chain conjugation system in the molecular structure and a compd. which consists of alkyne, alkene, etc., as skeleton and is added with an electron withdrawing group such as NO2, CN or CHO, and NR2 (R denotes hydrogen or alkyl group), OH or OCH3. A nonlinear optical effect is thereby obtd. with a low input. |
