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Nondestructive and simple method of optical-waveguide loss measurement with optimisation of end-fire coupling

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3 Author(s)
M. Haruna ; Osaka Univ., Japan ; Y. Segawa ; H. Nishihara

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.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 17 )