| 1. | The design of the transmissive variable optical attenuator
透射型电可调光衰减器的设计 |
| 2. | Polymer - based variable optical attenuator
聚合物热光可变光衰减器 |
| 3. | The temperature character of a novel variable optical attenuator
新型可变光衰减器的温度特性研究 |
| 4. | General rules of optical attenuators
光衰减器的一般规则 |
| 5. | Fixed optical attenuators
光衰减器固定 |
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目前我们可供应全系列的的各式光耦合器和分波多工器、光衰减器、以及跳接线等。 |
| 7. | The content of the thesis is classified into three parts . the first part summarizes the modern tecchnoligies for optical switches and variable optical attenuators , analyzes the pros and cons of the techniques involved
第一部分主要研究了现有光开关及可调光衰减器的实现技术，对各种技术的优点及缺点进行了分析，并对光开关及可调光衰减器技术现状进行了概述。 |
| 8. | The last part of the thsis presents a novel fast response digital variable optical attenuator . this device is driven by two electromagnetic driving units rather not stepper motors . a wide attenuation ( 40db ) was fully digitized and can be set by a certain number of driving pulses
论文最后针对现有数字可调光衰减器均由步进电机驱动，体积庞大，造价高昂且速度缓慢的缺点，利用微反射单元设计了一种高速数字式可调光衰减器。 |
| 9. | Electro - optical curves for lc cells have been analyzed and it has been shown mat a large attenuation range and a shallow attenuation slope can be achieved simultaneously for a variable optical attenuator based on a parallel - aligned lc cell with an appropriate surface anchoring strength . as compared with the existing liquid crystal - based voa structure ( using two cascaded lc cells with a particular material ) , the present structure is simple and has no special requirement for the lc materials
提出了基于弱锚定平行排列液晶盒的可变光衰减器(衰减范围大、衰减曲线下降平缓以保证调节精度) ，与己有液晶型可变光衰减器结构(选用特定液晶材料、两个液晶盒级联结构)相比较，本论文提出的基于弱锚定平行排列液晶盒的可变光衰减器结构简单，同时对于液晶材料无特殊要求。 |
