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外界损耗调制已用于新型的先对讲系统.这种系统不要求光纤的中间点上有光纤端头.系统的动态范围大,能在一极光纤的几个点上同时联络.为了实现这种性能,采用了与外界调制相结合的本地光检测技术和脉幅调制(PAM)技术.本文集中讨论1550nm用的原始型系统.从技术与操作两方面叙述系统的一些关键功能.还报道了原始型系统卓越的性能与方便的操作.
Outside the loss modulation has been used for the new intercom system. This system does not require the optical fiber at the midpoint of the fiber end. Dynamic range of the system at a few points in an optical fiber at the same time in contact. In order to achieve this The use of a combination of external modulation and the local light detection technology and pulse amplitude modulation (PAM) technology.This article focuses on the 1550nm original system used to describe both the technical and operational aspects of the system’s key functions are also reported Excellent performance and easy operation of the original system.