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A development of a fiber-type PLZT optical switch

光纤型PLZT光开关的研制

基本信息

批准号：
61850067
负责人：
MINAKATA Makoto
金额：
$ 4.61万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

The purpose of the project is the development of fiber-type PLZT optical switches and technology. The proposed switches are composed of an optical fiber which has a groove, a block of PLZT disposed in the groove, which acts as an electric field-inducing wavelength plate , and two polarizers disposed close to or in contact with both end surfaces of the wavelength plate. Polarizer consists of alternate lamination of a metal and dielectgric (LAMIPOL). To realize the switches, we have been developed new technology, and analized and partially fabricated the optical components.1. PLZT seramics ; To decide the optimum composition and fabrication process, optical and electrical properties of PLZT fabricated under various conditions have been measured.La/Zr/Ti=9/65/35 is the best composition in the HIP method.2. PLZT micro modulator (Wavelength plate); The modulator is a ridge type (60x60x980 <micrn>m) formed by mechanical cutter and photolithography. It has about 50 MHz modulation bandwidth, 10 V switching voltage and no insertion loss.3. LAMIPOLE; The polarizer is fabricated by alternately stachking thin films of Al (-50A) and dielectgric films of SiO2 (-2000A). The conbination of Al film sputtered under the Low background pressure and SiO2 film formed by evapolation shows good characteristics such as TE loss 30 dB and TM loss 0.4 dB at 1.3 <micrn>m wavelength.4. Formation of fiber groove; To excavate the groove, a micro-rapping technique invented by NTT Lab. is very useful and powerful. We are now under training of the micro-machining.5. Analysis of a fiberf-type PLZT optical switch; In summary, this switch can be operated at a low voltage(-30V), can achive a high switching speed (more than 50 MHZ),and allows low insertion loss(-0.8 dB) and miniturization of equipment(length 100 <micrn>m), and is best suited to fiber transmission systems.

该项目的目的是开发光纤型PLZT光开关和技术。所提出的开关由具有凹槽的光纤、设置在凹槽中的用作电场感应波片的PLZT块以及靠近或接触波片的两个端面设置的两个偏振器组成。偏光片由金属和介电材料 (LAMIPOL) 的交替层压而成。为了实现这种开关，我们开发了新技术，并对光学元件进行了分析和部分制造。 1． PLZT 陶瓷；为了确定最佳的成分和制备工艺，对不同条件下制备的PLZT的光学和电学性能进行了测量。La/Zr/Ti=9/65/35是HIP方法中的最佳成分。 2． PLZT微调制器（波长板）；调制器是通过机械切割和光刻形成的脊型（60x60x980微米）。具有约50MHz的调制带宽，10V的开关电压，无插入损耗。3．拉米波尔；该偏振片由Al薄膜（-50A）和SiO2（-2000A）介电薄膜交替堆叠而成。低背景压力下溅射的Al薄膜与蒸镀形成的SiO2薄膜的组合表现出良好的特性，在1.3μm波长处TE损耗30dB，TM损耗0.4dB。4．纤维槽的形成；为了挖掘凹槽，NTT实验室发明了一种微振打技术。非常有用且强大。我们现在正在接受微加工培训。5。光纤型PLZT光开关的分析综上所述，该开关可以在低电压（-30V）下工作，可以实现高开关速度（大于50 MHZ），并且允许低插入损耗（-0.8 dB）和设备小型化（长度100 <微米>米），最适合光纤传输系统。