Faculty Advisor

Liu, Yuxiang


In this MQP project, we create an optical trap using laser emitted from the tips of optical fibers. These “optical chopsticks” are composed of two parallel fibers with tips polished to a 20° angle. The motivation of our MQP was the long time and poor repeatability of the existing method to make these fiber tips. Our goal was to optimize the polishing method for better efficiency and repeatability. We developed three different designs of the fiber holder used in the polishing process, allowing reduction of the polished surface area and a better control of the polishing depth of the fiber tips. Our designs result in a reduction of the polishing time by about 90% and better control of the fiber tip shape. The fibers polished will then be evaluated by optical trapping of microparticles.


Worcester Polytechnic Institute

Date Accepted

April 2017


Mechanical Engineering

Project Type

Major Qualifying Project



Advisor Department

Mechanical Engineering