Title :
Nondestructive evaluation of coupling constants in single-mode optical channel waveguides
Author :
Tsubokawa, Makoto ; Tateda, Mitsuhiro ; Shibata, Norl ; Kawachi, Masao
Author_Institution :
NTT Electr. Commun. Lab., Ibaraki, Japan
fDate :
7/1/1988 12:00:00 AM
Abstract :
A nondestructive method is proposed for evaluating power coupling coefficients of directional couplers contained in an optical integrated circuit. This technique, which is based on optical heterodyne interferometry, makes it possible to obtain individual coupler element information without removing the element from the optical circuit. General N-channel waveguide coupling characteristics are analyzed, and they are experimentally evaluated for two- and four-channel waveguides that have been practically designed as frequency multi/demultiplexers operating in the 1.55-μm-wavelength region
Keywords :
directional couplers; integrated optics; optical couplers; optical testing; optical waveguides; 1.55 micron; directional couplers; four-channel waveguides; frequency multi/demultiplexers; nondestructive method; optical heterodyne interferometry; optical integrated circuit; power coupling coefficients; single-mode optical channel waveguides; two-channel waveguides; Coupling circuits; Directional couplers; Frequency; Integrated optics; Optical attenuators; Optical coupling; Optical interferometry; Optical mixing; Optical resonators; Optical sensors; Optical waveguide theory; Optical waveguides; Photonic integrated circuits;
Journal_Title :
Lightwave Technology, Journal of
