Sökning: "optical time domain reflectometry OTDR"

Hittade 2 uppsatser innehållade orden optical time domain reflectometry OTDR.

1. 1. Distributed Temperature Sensing Using Phase-Sensitive Optical Time Domain Reflectometry

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Simon Ek; [2020]
   Nyckelord :Applied physics; Distributed optical fiber sensing; Rayleigh scattering; OTDR; phase-OTDR; Temperature; Refractive index; Strain; Correlation; RISE; Single mode fiber; SMF; Tillämpad fysik; Distribuerad optisk fibermätning; Rayleigh-spridning; OTDR; phase-OTDR; Temperatur; Brytningsindex; Töjning; RISE; Korrelation; Singelmodfiber; SMF;

   Sammanfattning : This thesis explores and evaluates the temperature measuring capabilities of a phase-sensitive optical time-domain reflectometer (φ-OTDR), which exploits Rayleigh backscattering in normal single mode optical fibers. The device is constructed and its setup explained, and a protocol for making temperature measurements with it is developed. LÄS MER

3. 2. Study on Supervision of Wavelength Division Multiplexing Passive Optical Network systems

   Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Författare :Min Cen; [2011]
   Nyckelord :Fiber access networks; wavelength-division-multiplexed passive optical network WDMPON ; supervision; optical time domain reflectometry OTDR ;

   Sammanfattning : The wavelength-division-multiplexed passive optical network (WDM-PON) offers many advantages such as large bandwidth per user, easy management, high network security and low insertion loss enabling long-reach and/or high split-ratio. However, with the rapid development and growing interest for deployment of WDM-PON, the PON systems are becoming increasingly vulnerable to various failures. LÄS MER