Optical time domain reflectometry in a single-mode fiber

Review of long wavelength single-mode optical fiber reflectometry techniques

“…Analogue Direct Detection: The first analogue OTDR system operating at 1.3 pm was reported by Aoyama et al in 1981 [6]. Their system used a relatively powerful semiconductor laser ( P , = + 9 dBm) , a polarization sensitive beam splitter, and a room temperature Ge APD.…”

“…As in their earlier experiment [6], they used a relatively powerful semiconductor laser source and a room temperature Ge APD detector. This time, a performance very close to that expected theoretically was obtained for both coupler types.…”

Characterization of Rayleigh backscattering arising in various two-mode fibers

“…Many applications based on the RB arising in optical fibers have been widely explored, such as optical time domain reflectometry (OTDR) [3], optical fiber pipeline safety monitoring [4], distributed acoustic sensing [5]. However, when it comes to fiber optical bi-directional transmission, RB becomes one of the dominant impairment sources [6][7][8][9].…”

Demodulation System of the FBG Reflectance Spectrum Based on Optical Low Coherence Reflectometry

“…The traditional basic way to achieve the reflectance spectrum is using the optical spectrum analyzer(OSA), but the higher resolution and accuracy OSA is quite expensive and cannot directly get the varied physics. However, nowadays the reflectometric techniques which include OLCR [2,3], optical frequency domain reflectometry(OFDR) [4,5]and optical time domain reflectometry(OTDR) [6] can successfully be used in FBGs detecting. And among them, the OLCR is the most popular and effective one.…”