Basic Research of Polymer Optical Fiber Amplifier

本研究着重从理论上分析了新型掺染料塑料光纤放大器的基本放大过程。即测量了低浓度染料分子在光纤中的吸收截面和发射截面，并对三能级系统的速率方程进行了分析。例如，作为罗丹明染料的分析结果，可以给出数百至两千倍的扩增。光纤中的光栅结构可以实现放大器和振荡器的统一功能。我们正试图从基本的角度来实现这种类型的设备。我们已经观察到光纤末端的光线变窄了。在世界范围内石英光纤的研究中，各种光栅结构的制作也是非常令人兴奋的。我们的这类研究在该领域占据垄断地位。本文还研究了香豆素染料在蓝光波段的波导型环形激光器。光谱中的类尖峰发射证实了激光的存在。提出了光放大技术在医学上的应用，新型的光动力学过程可能与新的光活化药物一起抑制或杀死癌组织。这项研究是有希望的。

In this research we can emphasize that theoretically basic processes of amplification in the novel dye-doped plastic fiber amplifier is analyzed at the begining. Namely absorption and emission cross-sections of dye molecules in the fiber at low concentration were measured and they are used analysis of the rate equation of three level system. For example as the result of the analysis for Rhodamine dyes may give amplifications from hundred to two thousand times. Grating structures in the fiber may give unified functions between amplifier and oscillator. We are trying to realize this type of device from the basic point of view. We already observed the narrowing of light from the end of the fiber. In the world wide researchs of silica optical fibers also fabrications of various grating structures are very exciting now. Those kinds of our researchs occupied monopolised position in the field. Waveguide type ring laser was also studied by coumarin dye at blue light range. The evidence of lasing was confirmed by spike-like emission in spectra. Light amplification for medical use was also proposed.New type of photo-dynamic process may surpress of kill the cancer tissue with a new photo-activating pharmacy. This study is promissing.