Title :
Alignment tolerance measurement using a DFB laser based on degradation of signal-to-noise ratio owing to speckle noise for short distance multimode optical fibre communication
Author :
Koike, S. ; Kaizu, K.
Author_Institution :
NTT Network Service Syst. Labs., Tokyo, Japan
fDate :
4/11/1996 12:00:00 AM
Abstract :
A method is proposed for measuring the alignment tolerance between multimode fibres including the effect of speckle noise for short distance high speed optical fibre-communications. The alignment tolerance in the step-index-type multimode optical fibre with a core diameter of 80 μm was found to decrease by ~50% compared to that calculated under conditions of uniform excitation with a coupling loss change of 2 dB
Keywords :
distributed feedback lasers; interference (signal); measurement by laser beam; optical fibre communication; optical fibre losses; optical fibre testing; spatial variables measurement; speckle; DFB laser; SNR degradation; alignment tolerance measurement; coupling loss; high speed fibre communications; multimode optical fibers; multimode optical fibre communication; short distance communication; signal-to-noise ratio; speckle noise; step-index-type multimode fibre;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960488
