彩色视频信号PFM光纤传输系统的研制

The development of fiber optic video transmission PFM systemswith high quality practicality and low cost

描述了一种广泛运用在广播视频传输系统和监控系统中的ＰＦＭ光纤视频传输系统，分析了视频信号方波脉冲频率调制（ＳＷＦＭ）传输系统的工作原理，成功地开发研制了发射光端机和接收光端机。其中主要技术指标为：视频信噪比ＳＮＲ≥７２ｄＢ；微分增益ＤＧ≤±１．５％和微分相位ＤＰ≤±１．５°；单模光纤（１．３μｍ）无中继传输达到４５ｋｍ。该光纤视频传输系统具有高质量、实用化、低成本、传输距离长的特点和优势。

Fiber optic video transmission PFM systems are widely used in broadcast TV transmission systems and monitor systems. In this paper, the operating principles of square wave frequency modulation(SWFM) fiber optic video transmission systems are analyzed, and the transmitter and receiver are successfully developed. The main technical specifications are, signal-to-noise ratio SNR≥72dB;differential gain DG≤±1.5%; differential phase DP≤±1.5°, and45km of video transmission through single mode optic fiber (1.3μm) without repeater. The characteristics and advantages of the systems are high quality, practically, low cost and long distance.