Phase noise compensation in an interferometric system

摘要: Techniques for testing or analyzing optical components are known. A “device” under test (DUT), such as a length of fiber optic cable, may be carefully tested for faults or may be analyzed to determine whether the device is suitable for use in a particular application. System components Such as multiplexers, demultiplexers, croSS connectors, and devices having fiber Bragg gratings may be separately tested before a System is assembled. Optical testing may be performed using a heterodyne optical network analyzer. Such analyzers may be employed for measuring properties of optical components, Such as group delay.“Group delay'is Sometimes referred to as envelope delay, Since it refers to the frequency-dependent delay of an envelope of frequencies, with the group delay for a particular frequency being the negative of the Slope of the phase curve at that frequency. Typically, a heterodyne opti cal network …