In order to solve the problems of direction identification and adjustment in the traditional feeding method of optical fiber connector ceramic ferrules, a fully automatic feeding system solution was proposed, and the core component of the system, the rotating platform was designed. The rotating platform uses a photoelectric detector to identify the two different end faces of the ceramic ferrule, and adjusts the ceramic ferrule to the correct direction through a rotating rod installed in the center of the rotating platform. The system can complete part identification, adjustment and feeding in one process, effectively solving the problem of feeding ceramic ferrules. The fully automatic feeding system was applied to the ceramic ferrule precision grinder and a production test was carried out. According to the statistical data of the test and the comparison before and after adopting the fully automatic feeding system, the use of this system can not only meet the production requirements of the parts, but also improve the production efficiency, reducing the labor force, and the product qualification rate is significantly improved. Meanwhile, the design of this system provides a reference for the design of feeding systems for similar products.
Due to the requirements of micro-hole processing of ceramic ferrules, the precision spindle of the micro-hole grinder was designed. In order to verify the rationality of the design, the finite element analysis software ANSYS Workbench was used to conduct finite element modeling of the spindle, and modal analysis was performed on the spindle. The first six orders of natural frequency, vibration shape, critical speed and other dynamic characteristics of the spindle were analyzed. According to the analysis results, the maximum working speed of the spindle is far lower than 75% of its first-order critical speed, effectively avoiding the resonance zone and verifying the rationality of the spindle design. At the same time, this research provides a reference for the design and simulation of similar products.
KEYWORDS: Transmitters, Optical communications, Modulation, Signal to noise ratio, Radio optics, Optical transmission, Information security, Channel projecting optics, Telecommunications, Distortion
In order to authenticate the optical transmitter effectively and improve the transmission performance of the optical communication greatly, the paper studies a method of optical transmitter authentication based on group delay estimation. The paper extracts the bispectrum phase information of the optical channel according to the communication frame sequence of the transceiver system, and lists the phase frequency coefficient square matrix of the transmission system to estimate the transmitter group delay characteristic parameters. The simulation results show that, even when the signal to noise ratio (SNR) is 5dB, normalized mean square error (NMSE) of estimated group delay by the bispectrum algorithm can reach -18dB. Compared with the traditional method, the method introduced in this paper show that the group delay estimation method is more effective and has better performance against noise.
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