.Low-loss fiber optic rotary joint using C-lens collimators[J].Optoelectronics Letters,2005,1(3):221-223 Low-loss fiber optic rotary joint using C-lens collimators JIA Da-gong JING Wen-cai ZHANG Yi-mo ZHOU Ge ZHANG Jin TANG Feng College of Precision Instrument ＆ Opto-electronics Engineering, Key Loboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin University, Tianjing 300072, China Abstract:       A low-loss fiber optic rotary joint (FORJ) has been designed by using two kinds of C-lens collimators. Its insertion loss and insertion loss variation due to rotation with single-mode fiber collimator is less than 1.76 dB and 0.43 dB respectively. The maximum insertion loss and coupling variation due to rotation with multi-mode fiber collimator is 1.71 dB and 0.29 dB, respectively. This kind of FORJ features low insertion loss, small coupling variation due to rotation and low cost. This work was supported by the National Natural Science Foundation of China under contract No. 60377031, and National Basic Research Program of China under contract No. 2003CB314907. Hits: 3709 Download times: 188 View Full Text    Download reader