Title :
Nondestructive and simple method of optical-waveguide loss measurement with optimisation of end-fire coupling
Author :
Haruna, M. ; Segawa, Yuji ; Nishihara, Hideaki
Author_Institution :
Osaka Univ., Japan
Abstract :
The authors propose and demonstrate a nondestructive and simple method for optical-waveguide loss measurement in which the end-fire coupling efficiency is optimised so that an input beam spot size becomes exactly the same as the mode size of a guided wave. An accuracy of better than 0.05 dB/cm has been achieved in Ti:LiNbO3 waveguides.
Keywords :
lithium compounds; optical loss measurement; optical testing; optical waveguides; titanium; LiNbO 3:Ti; Ti:LiNbO 3 waveguides; end-fire coupling efficiency; guided wave mode size; input beam spot size; nondestructive method; optical-waveguide loss measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921025
