权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Research on Integrated Nonlinear Optic Quasi-Phase-Matched Wavelength Conversion Devices for Wavelength-Division-Multiplexing Optical Communication of Next Generation

用于下一代波分复用光通信的集成非线性光学准相位匹配波长转换器件的研究

基本信息

批准号：
12555012
负责人：
SUHARA Toshiaki
金额：
$ 8.58万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

Design, fabrication, and evaluation of quasi-phase matched waveguide nonlinear-optic wavelength conversion devices for future photonic network and their applications to ultrafast optical signal processing were studied. The obtained results are summarized as follows.1 Elementary fabrication techniques were established and improved. Technique to form high-quality ferroelectric domain- inverted gratings for quasi-phase matching up to 30 X 25 mm^2 area was established. Possibility of forming domain inverted gratings of submicrion period was shown. Technique to fabricate low-loss Zn-diffused LiNbO_3 waveguides was developed.2 Technique for designing wavelength conversion devices of difference-frequency generation type was established. In the standard configuration, normalized conversion efficiency of 324 %/W was obtained. In a high-index cladding waveguide type proposed for improvement of efficiency, an efficiency as high as 790 %/W was accomplished.3 A new device construction was proposed for polarization-independent wavelength conversion. As a preliminary experiment, a QPM device was fabricated using a Zn : LiNbO_3O waveguide, and SHG efficiency of 15 %/W was demonstrated.4 As applications to ultrafast optical signal processing for optical communication, an optical switch based on cascaded second-harmonic generation and difference-frequency generation, and an optical gate switch based on an integrated interferometer and sum-frequency generation device, were proposed and fabricated. Picosecond optical switching was demonstrated.5 Integrated high-power semiconductor lasers for application as a pump-wave source for the wavelength convension devices were studied. A high-power external-cavity tunable laser was proposed and fabricated. Output power of 105 mW, wavelength tuning rage of 22 nm and nearly-diffraction-limited collimated beam output were demonstrated.

研究了面向未来光子网络的准相位匹配波导非线性光波长转换器件的设计、制造、评价及其在超快光信号处理中的应用。所得结果总结如下：1建立并改进了基本的制作工艺。建立了高质量铁电畴反向光栅的制备技术，可实现30 × 25 mm^2的准相位匹配。证明了形成亚粒子周期畴倒光栅的可能性。研究了制备低损耗锌扩散LiNbO_3波导的工艺建立了差频产生型波长转换装置的设计技术。在标准配置下，归一化转换效率为324% /W。在为提高效率而提出的高折射率包层波导中，效率高达790% /W提出了一种与偏振无关的波长转换器件结构。作为初步实验，采用Zn: LiNbO_3O波导制作了QPM器件，并证明了SHG效率为15% /W作为光通信中超快光信号处理的应用，提出并制造了一种基于级联二次谐波和差频产生的光开关，以及一种基于集成干涉仪和和频产生装置的光门开关。展示了皮秒光开关研究了集成高功率半导体激光器作为波长转换器件的泵浦源。提出并制作了一种大功率外腔可调谐激光器。输出功率为105 mW，波长调谐范围为22 nm，准直光束输出接近衍射极限。