Abstract: WANG Nan-nan,WANG Gao,LI Yang-jun,WANG Xiao-yan,ZHAO Hui(National Key Laboratory For Electronic Measurement Technology,North University of China,Taiyuan 030051,China) In order to produce zirconia crystal optical fibers,a pulling single crystal fiber system was put forward based on the method of laser heating pedestal growth(LHPG).Based on original LHPG,a circular focused laser heating system was designed and its optical system was improved and optimized.Making use of both focal points in an ellipsoidal mirror,a focused circular heating source was formed at one of the focal points to melt the crystal and produce fibers.Optical simulation was carried out with ZEMAX software.The simulation results indicate that a high quality circular heating source can be formed at the focal point of the optical system.The system has incomparable advantages comparing with other laser pedestal heating optical systems.The system has good application in the production of zirconia and other high temperature single-crystal optical fibers.