Supply and Removal Characteristics of Oil in Optical Waveguide for Automated Optical Main-Distributing-Frame System

Naoyuki TAMARU  Mitsuhiro MAKIHARA  Shuichiro INAGAKI  Akira NAGAYAMA  Kunihiko SASAKURA  

IEICE TRANSACTIONS on Communications   Vol.E77-B   No.2   pp.209-217
Publication Date: 1994/02/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Photonic Switching Technologies)
matching oil,  optical waveguide,  groove,  supply/removal of oil,  reflection loss,  transmission loss,  

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We studied the supply and removal of oil to and from a thin groove and the consequent insertion loss, aiming at matrix optical waveguide switches that utilize optical reflection and transmission effects at the groove. A robot precisely controlled the position of the removal nozzle and the supply needle by a vision servo. The optimum position for the removal nozzle was at the entrance of the groove to a circular oil pool, and the positioning margin was 10-15µm around the optimum position. The on-off ratio of the switching light power at the optimum position was about 30dB. The removal time was proportional to the kinetic viscosity of the oil, and the optimum height of the removal nozzle was independent of the kinetic viscosity of the oil. An analysis of the insertion loss revealed that the main factor in the loss at the reflection is the tilt of the groove wall.