Pump-enhanced evaluation scheme of Rayleigh backscattering coefficient distribution of EDF based on optical low-coherence domain reflectometry

Distributed bonding interface characterization of composite laser crystal based on optical low-coherence reflectometry

“…OLCR originated from the theory of partial coherence [10] and was practically developed and applied in the field of fiber optic sensing [11] and fiber fault diagnosis [12][13] in the 1980s. In recent years, it has gradually expanded to the testing of polarization-maintaining fibers [14] , active fiber [15][16] , fiber optic devices ( FBGs [17] , couplers [18] , etc. ), and bulk optical devices (such as surface inspection [19] and thin film thickness measurement [20] ).…”