DEVELOPMENT OF OPTICAL FIBER AMPLIFIER MASS FOR WDM AND SETUP OF EVALUATION SYSTEM OF GAIN CHARACTERISTICS

在本项目中，我们开展了以下研究课题：（A）开发用于掺铒光纤放大器的新型基质玻璃材料，（B）开发在1.4~ 1.52μm波长范围内显示光增益的掺Tm氧化物玻璃材料，（C）通过双波长泵浦方案实现掺铥光纤放大器的高效率和增益漂移，（D）建立掺铒光纤基本光学特性的评估系统，并探索增益特性与光纤放大器性能的关系，（E）用于超声波的铬（IV）离子掺杂的玻璃陶瓷材料的开发这些课题都是非常重要的，关系到未来宽带光放大器的材料开发和器件设计WDM通信系统的性能评估系统包括从S波段到L波段的增益饱和度和增益谱的自动测量，通过IEEE 488电缆将相关仪器与个人计算机连接。该系统的工作相当不错，我们相信它的一个最好的一个在所有的日本研究所在评估的光放大器设备。

In this project, we have carried out the following research subjects:(A) Development of Novel host glass materials for Erbium-doped Amplifier,(B) Development of Tm-doped oxide glass materials showing the optical gain in the wavelength range of 1.4~ 1.52μm(C) High efficiency and gain shift of Thulium doped fiber amplifier by the dual-wavelength pumping scheme,(D) Setup of evaluation system of fundamental optical properties of Erbium-doped fibers and search for the relationship the gain characteristics,(E) Development of Chromium(IV) ion doped glass ceramics materials for ultra-broadband amplifier in the future WDM telecommunication.All of these subjects are very important and related with the material development and device design for broadband optical amplifiers for the future broadband WDM telecommunication system.Our evaluation system developed includes the automatic measurement of gain saturation and gain spectra from the S-band to L-band by connecting related instruments with a personal computer by IEEE488 cables. The system works quite fine and we believe it one of the best one among all the Japanese institutes in terms of evaluation of optical amplifier devices.