The Experimental Interface Of Simulation Of Optical Trapping Force And The Research Of Single-Mode Fiber Optical Tweezers

Optical tweezers as a single particle beam trap, which consist of highly compact single-beam lasers, could capture flexibly biological large molecules particles (ball), cell vehicles from several nm to tensμm, and basically does not affect surroundings of the catch, a non-contact, non-destructive bacterial operation. At present the technology of single-mode fiber optical tweezers is widespread application, and launching laser beam from the optical fiber-end forms the optical trap which is apart from microscope, making the observation and the operation of sample more freely.In this thesis, the summary of single-mode fiber optical tweezers and the theorem of optical tweezers are given. Theoretical analysis and calculation of optical trapping vertical force and optical trapping transverse force and development of optical tweezers experimental interface based on computer softer are described.According to the development trend of optical tweezers, it studies the single-mode fiber optical tweezers technology further, and detail on the working principles, the experimental device, experiment and prospects of the single-mode fiber micro-probe optical tweezers technology and micro-mechanical structure of the multi-beam single-mode fiber optical tweezers technology.First of all, in the aspect of development of optical tweezers experimental interface, the characteristics of the optical trapping vertical force and optical trapping transverse force is simulated .Then the character of the optical trapping force is analyzed by setting the systemic parameters including the radius of the beam waist, the relative refractive index, laser wavelength and power, which operate on the Mie particle. In the end it achieves the procedural quantitative calculation and error analysis about the optical trapping transverse force using Stokes formula of Fluid Dynamics. The experimental interface is not only able to modify the experimental result through analogy, but also contrast the analog value by experimental data.