v Abstract This study was developed using fiber drawing tower to fabricate various types of capillary fiber and microstructured fiber. For example, different diameter sizes, different thickness, different internal diameter ratio of the capillary fiber and capillary tube, single ring and double ring hexagonal arrangement of the air-holes microstructured fiber. Trying different ways to create complex structures preform, we use the stack - drawing - cutting way, is now able to produce only simple pressure can be achieved by the complex structure of the preform, compared to drilling way, we can effectively reduce the production costs of 80%. Now successfully produced a single ring and double ring hexagonal air holes arranged in preform which has been drawn into standard fiber. Depending on the optical properties, we can use quartz tube with a row of self-developed method to produce most of the complex structure of the preform. However, each fiber is still not very uniform about the pores, which we need to improve in the manufacturing process of fiber drawing. Produce more diverse system and much homogeneous microstructured fiber as the goal. Application is to use the self-fabricated capillary tube, after processing, the production target into a low-loss device, then inject different materials within the devices, and do the different optical measurements for our devices.

In this study, we will discuss the fabrication detail about the capillary optical fiber and microstructured optical fiber (MOF) from the preform manufacture to the drawing process and apply our capillary optical fiber in a temperature sensor device. First, we discuss the influence of the drawing parameters contribution for the fiber, and we will introduce how to design a preform and discuss how to keep our fibre geometry in drawing process by controlling the drawing parameters. For better fiber products, we need to make some important improvements such as fixing the preform geometry and designing the preform pressure or vacuum input path before the fiber drawing process. In the fiber drawing we want to control the fiber inner diameter and make the interval between three capillary tube disappear. We will solve these problems by different preform making methods or drawing tower hardware design and drawing parameter control. Now we can successfully make single ring hole MOFs by the capillary tube sealed method. But the hole structure is not as good as expectation. We will try to design a pressure and vacuum input device to replace the capillary tube sealed method. And help us to make better and more different MOF structures. We also used our capillary optical fiber to be a temperature sensor. We will describe the principle and the sensing sensitivity of our sensing device in this study. Our temperature sensing device shows a linear relationship between the temperature and operation wavelength, and the sensing sensitivity is 0.038nm/¢XC