Title :
Suppression of oscillation in attenuation with wavelength in SC-type fixed optical attenuators
Author :
Takeuchi, Y. ; Mitachi, S. ; Nagase, R.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
7/3/1997 12:00:00 AM
Abstract :
The oscillation in attenuation of >3 dB with wavelength in SC-type fixed optical attenuators with attenuation values >15 dB has been effectively suppressed by reducing the coupling between the cladding and core modes in optical absorption fibres. This has been achieved by increasing the refractive index in the outer part of the cladding; polarisation dependent loss (PDL) has also been drastically reduced
Keywords :
light absorption; optical communication equipment; optical fibre losses; refractive index; waveguide attenuators; SC-type; attenuation oscillation suppression; cladding modes; core modes; fixed optical attenuators; optical absorption fibres; polarisation dependent loss; refractive index; wavelength;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970821
