By Topic

An optical time-domain reflectometer with low-power InGaAsP diode laser

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
A. Sudbo ; Norwegian Telecommunications Administration Research Establishment, Kjeller, Norway

An optical time-domain reflectometer (OTDR) suited for operation with low-power (of the order of 1-mW peak power) InGaAsP lasers is described. To launch maximum average power into the fiber, the laser is modulated by a pseudonoise binary sequence, and the back-scattered signal is averaged and then analyzed by a microcomputer. Initial tests of the reflectometer with a germanium avalanche photodiode (Ge APD) detector demonstrate backscattering signal levels at 1300 nm from 50-μm core diameter graded-index fibers of more than 15 dB above the system noise.

Published in:

Journal of Lightwave Technology  (Volume:1 ,  Issue: 4 )