Title :
Precise control of phase constant of optical guided-wave devices by loading Langmuir-Blodgett films
Author :
Haga, Hiroshi ; Yamamoto, Sadahiko
Author_Institution :
Fac. of Eng. Sci., Osaka Univ., Japan
fDate :
6/1/1988 12:00:00 AM
Abstract :
A Langmuir-Blodgett film is used as a cover layer of single mode waveguide to precisely control the phase constant of the guided-mode. The change of phase constant caused by the cover layer is evaluated by measuring the retardation between the two arms of the ion-exchanged glass waveguide Mach-Zehnder interferometer, a part of which is loaded by Langmuir-Blodgett films. A monolayer of cadmium stearate has varied the phase constant on the order of 10-6. This method can be used to adjust the phase difference or shift to tune the performance of guided-wave devices such as directional couplers and modulators
Keywords :
Langmuir-Blodgett films; ion exchange; light interferometers; optical films; optical waveguides; Langmuir-Blodgett films; cadmium stearate; directional couplers; ion-exchanged glass; optical guided-wave devices; phase constant; phase difference; retardation; Arm; Glass; Optical control; Optical devices; Optical films; Optical interferometry; Optical waveguide components; Optical waveguides; Phase measurement; Waveguide transitions;
Journal_Title :
Lightwave Technology, Journal of
