DISTRIBUTED PULSED OPTICAL AMPLIFIER BASED ON FIBER-OPTICAL PARAMETRIC AMPLIFICATION AND AMPLIFICATION AND PERFORMANCE CHARACTERIZATION METHODS

摘要

Disclosed is a distributed pulsed optical amplifier based on fiber-optical parametric amplification, comprising a pump pulse light source, a sensing pulse light source, a synchronization device, a two-in-one optical coupler, an optical circulator, a parametric amplification optical fiber, a first optical filter, a photodetector, and a signal acquisition device. The present invention uses high-power pulsed light as pump light, and generates a fiber-optical parametric amplification effect near a zero-dispersion wavelength of an optical fiber, so as to amplify power of another sensing pulsed light. Moreover, as low-power leaked light outside the existing duration of pump pulsed light cannot effectively achieve fiber-optical parametric amplification, the leaked light of sensing pulsed light cannot be amplified, thereby also achieving the effect of amplifying the pulse extinction ratio.