新型微流控可调光波导功能器件的研究

发布时间：2018-10-05 17:10

【摘要】：微流控可调光波导功能器件是一种新型光学元器件,它具有光学性能可调、体积小、重量轻、稳定性好和便于集成等诸多优点,在信息光子学、光信息处理、生物传感、医学诊断等诸多领域具有广阔的应用。但是,目前各种有关可调微流体光波导功能器件的研究,还存在着诸多的不足,离实际应用还有一定的差距,因此,探索并研究新型微流控可调光波导功能器件具有重要科学意义和应用价值。本文针对已报道的各种微流控可调光波导功能器件,具体包括基于液-液界面的可调光波导器件和基于固-液界面的微流体可调光波导器件,进行了详细的调研,并分析其调控原理和存在的优缺点。在此基础上,提出了几种光学功能不同的新型微流控可调光波导器件,即微流控可调光衰减器、微流控可调光分束器和微流控可调光耦合器等。提出了一种多段偏折型波导微流控可调光衰减器,在波导的第一折线处设计制作一个微流体通道,通入液体与波导形成固-液界面。光信号通过锥形光纤耦合进入光波导,原本在波导与液体分界面上发生全反射的光,随着液体折射率由低到高的变化,透射进入微流体通道中光功率也将随之发生改变,从而实现了对波导中传输光功率的可变衰减。其次,采用非对称型Y分支波导与流体通道集成结构来实现微流控波导型可调光功率分束器。在Y波导的直线分支上方,覆盖有一条微流体通道。光信号通过锥形光纤耦合进输入端口,传播到Y分支处的光波将发生反射和透射,光束分别进入左、右分支,随着微流体通道中液体折射率的变化,分束器的光功率分束比随之改变,从而实现了光功率分束器的动态调控。接下来,通过级联方式,设计得到了1×5的可调光功率分束器。最后,利用平行光波导耦合理论,设计了微流控光波导耦合器,对器件的各项光学性能指标进行了简单的分析。采用微流控方法,设计了一种微流控M-Z型光调制器。
[Abstract]:Microfluidic tunable optical waveguide function device is a new kind of optical component. It has many advantages such as adjustable optical performance, small volume, light weight, good stability and easy integration. It is widely used in information photonics, optical information processing, biosensor, and so on. Medical diagnosis and many other fields have a wide range of applications. However, there are still many deficiencies in the research of the tunable micro-fluid waveguide functional devices, which are still far from practical applications. It is of great scientific significance and application value to explore and study new microfluidic tunable optical waveguide functional devices. In this paper, various kinds of microfluidic tunable optical waveguide devices reported, including tunable optical waveguide devices based on liquid-liquid interface and microfluid tunable optical waveguide devices based on solid-liquid interface, are investigated in detail. The principle of its regulation and the advantages and disadvantages of its existence are analyzed. On this basis, several novel microfluidic tunable optical waveguide devices with different optical functions are proposed, namely, microfluidic tunable optical attenuators, microfluidic tunable beam splitters and microfluidic tunable optical couplers. A multi-segment deflected waveguide microfluidic tunable optical attenuator is proposed. A microfluidic channel is designed at the first broken line of the waveguide to form a solid-liquid interface between the liquid and the waveguide. The optical signal is coupled into the optical waveguide by tapered optical fiber. The total reflection of the light on the interface between the waveguide and the liquid will occur. With the change of the refractive index of the liquid from low to high, the optical power will change with the transmission into the microfluid channel. Thus the variable attenuation of the optical power transmitted in the waveguide is realized. Secondly, an asymmetric Y-branch waveguide and a fluid channel integrated structure are used to realize the microfluidic waveguide tunable beam splitter. A microfluid channel is overlaid over the straight-line branch of the Y-waveguide. The optical signal is coupled to the input port through a tapered fiber, and the light waves propagating to the Y branch will be reflected and transmitted, and the beam will enter the left and right branches, respectively, with the change of the refractive index of the liquid in the microfluid channel. The optical power splitting ratio of the beam splitter changes with it, thus realizing the dynamic control of the optical power splitter. Then, a 1 脳 5 adjustable optical power splitter is designed by cascading. Finally, using the parallel optical waveguide coupling theory, the microfluidic optical waveguide coupler is designed, and the optical performance of the device is analyzed simply. A microfluidic M-Z optical modulator is designed by using microfluidic control method.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN252

【相似文献】