Research On Hybrid-type Microgripper For The Operation Alignment Of Optical Fiber Phase

Optical fiber assembly and its phase alignment is not only the important technology of MEMS optical switch assembly but also the key difficulty.The traditional microgripper can complete operation of the optical fiber clamping but is difficult to realize its phase alignment operation.This paper aimed at the problem,on the basis of analyzing the characteristics of optical fiber and its operation process,the programis proposed of facing on the hybrid-type microgripper for the operation of fiber phase alignment the microgripper.And it is analyzed and studied on the configuration,force and stroke characteristics,the Force model of optical fiber's pickup and rubbing,and the control method of hybrid-type microgripper.This paper mainly includes the following contents:Firstly,according to the hard contact clamping method,which the optical fiber has the characteristics of light,fine,crisp and so on,is not suitable for use.A vacuum adsorption method is proposed to carry out the flexible clamping operation.Aiming at the operation of the optical fiber phase alignment,it is proposed that a finger rubbing alignment operation that it is driven by piezoelectric ceramic.The configuration of hybrid-type microgripper is designed based on the micro displacement amplification mechanism of flexible hinge,which two kinds of operations of the optical fiber clamping and alignment are integrated into one microgripper.And the research of the operation process of micro component of the hybrid-type microgripper is done.Secondly,analysis of kinematics and mechanics characteristics of the micro-gripper.Through the comprehensive analysis and modeling of the output displacement characteristic,power stroke,microgripper mechanism stiffness,the force model of optical fiber's pickup and rubbing,and other performancesof the hybrid-type microgripper,Weobtain thatthe magnification of the finger 1 and finger 2 of the microgripper are 5.4 times and 12 times and the end displacement stroke of them were 189?m and 240?m,and verify the realization of the microgripper.Then through the simulation analysis and optimization of the characteristics of the microgripper by using ANSYS finite element software,Weobtain thatthe magnification of the finger 1 and finger 2 of the microgripper are 5.04 times and 11.1 times and the end displacement stroke of them were 176.5?m and 198.3?m.The feasibility of the designed micro-gripper to adsorbed clamp and rub the optical fiber is further verified,which provide theoretical basis for the design of the hybrid-type microgripper.Then,through the comprehensive analysis of the various characteristics Modeling and optimization of the hybrid-type microgripper,the two fingers of structure of which is designed based on vacuum adsorption andpiezoelectric effect.After the material selection and preparation for the Microgripper prototype,and according the micro-gripper is need to realize the required functions,Design and preparation of driving unit,Vacuum adsorption unit and controlling unit is done.Finally,building the micro operation experiment platform,and doing the analysis of the micro operation experiment and result.Through theperformance test of the hybrid-type microgripper is carried out,weobtain that theactual displacement of the hybrid-type microgripper were 173?m and 194?m,and it meets the design require-ments of the microgripper.With two kinds of fibers with a diameter of 90?m and 120?m as the object,the experiment of clamping and rubbing the Optical fiber is carried out by using the microgripper.The experimental results show that the hybrid-type microgripper can reliably pick up and release of optical fiber,and realize the operations of adjustment and alignment of optical fiber phase.