Fiber Loop Mirror(FLM) sensing system has been widely studied in recent years, and High Birefringence Photonic Crystal Fiber (HiBi-PCF) has high birefringence, which is always the best choice for FLM sensing system(HiBi-PCF-LM). Currently, PCF is generally embedded in the fiber loop in most HiBi-PCF-LM sensing systems, and the sensor size is large. This sensing system can not be used for distributed remote measurement, and it is limited in the practical application. Therefore, HiBi-PCF-LM sensing system with an independent probe is proposed, and it provides the direction for the practical application of the FLM sensing system. However, there is no specific theoretical analysis of this sensing system in the existing research results. In order to further clarify its sensing mechanism and improve the application value of the sensing system, the interference spectrum equation are specifically deduced and the relationship between the period of interference spectrum and the length size of HiBi-PCF is discussed in this paper. It provides the theoretical basis for the practical and miniaturization of the FLM sensor.
As one of the most interesting II–IV compound semiconductors, ZnO has large band gap (3.37 eV) and high excitonic binding energy (60 meV). Based on this, it has attracted a great deal of attention for applications in ultraviolet light-emitting devices (LED) and photodetectors. There are many preparation methods to prepare ZnO films, such as metal organic chemical vapor deposition (MOCVD), magnetron sputtering, vacuum thermal evaporation, and so on. Among them, there are many advantages on using magnetron sputtering to form ZnO thin films, such as good adhesion, good thickness uniformity, high density of films, so we take advantage of this method in our experiment. In this work, we present a simple, rapid and cost effective method to fabricate ordered periodic substrates by preparing single layer polystyrene microspheres masks, with 300, 600, 800and 1100 nm in diameters. Then the layer of zinc oxide thin films on the mask by RF magnetron sputtering technique have been deposited, and two-dimensional zinc oxide nano-array samples were obtained at last. Using this active plasmonic substrate, the optical properties of ZnO films on polystyrene microspheres template has been investigated.
As one of the most interesting II–IV compound semiconductors, ZnO has large band gap (3.37 eV) and high excitonic binding energy (60 meV). Based on this, it has attracted a great deal of attention for applications in ultraviolet light-emitting devices (LED) and photodetectors. There are many preparation methods to prepare ZnO films, such as metal organic chemical vapor deposition (MOCVD), magnetron sputtering, vacuum thermal evaporation, and so on. Among them, there are many advantages on using magnetron sputtering to form ZnO thin films, such as good adhesion, good thickness uniformity, high density of films, so we take advantage of this method in our experiment. In this work, we present a simple, rapid and cost effective method to fabricate ordered periodic substrates by preparing single layer polystyrene microspheres masks, with 300, 600, 800and 1100 nm in diameters. Then the layer of zinc oxide thin films on the mask by RF magnetron sputtering technique have been deposited, and two-dimensional zinc oxide nano-array samples were obtained at last. Using this active plasmonic substrate, the optical properties of ZnO films on polystyrene microspheres template has been investigated.
In order to study the influence of environment temperature variation on the quality of holographic images, the change of transmit path in the holographic optical system is analyzed for both objective beam and reference beam before and after mirror deformation. In theory, finite element analysis method is used to simulate the anti-three through seven mirror deformation at 27℃, 28℃ and 29℃. And a new real-time monitoring and displaying laser speckle system is designed for measuring ambient temperature and beam splitting mirror distortion detection. The deformation value measured in the experiment are 406nm, 420nm and 427nm respectively at the same temperature mentioned above. The results show that theoretical and experimental values are in good agreement, and errors are less than 0.5%.
KEYWORDS: Mirrors, Beam splitters, Holography, Temperature metrology, Temperature sensors, LED displays, Sensors, Light emitting diodes, Imaging systems, Laser systems engineering
The 45° beam splitting mirror plays a vital role on image quality in the Holographic system, in order to study the influence of environment temperature variation on the 45° beam splitting mirror in the Holographic system, finite element analysis method is used to simulate the anti-three through seven mirror deformation at 27℃, 28℃ and 29℃ temperature in theory. A new real-time monitoring and displaying photoelectric system for ambient temperature and beam splitting mirror distortion detection is designed to provide real-time temperature change and deformation detection , which is made up of laser speckle interferometer, chip temperature sensor, two-operational amplifier, MCU and LED indicator. And the out-plane displacement value measured in the experiment under the condition of temperature correspondingly are 406nm, 420nm and 427 nm. Finally, the relation equation of temperature and mirror deformation is established by the method of exponential equation fitting, which will provide preliminary theoretical and experimental reference for further research.
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