Abstract
Very high speed modulation of guided light has been reported using directional coupler switches (ref. |1, 2|) or Mach-Zehnder interferometers (ref |3, 4, 5, 6|). In some applications base band operation is not necessary and band pass type modulators around a given frequency may be preferred. Such resonance has been predicted in ref |7| where switching diagrams of Y-fed directional couplers have been investigated. A Y-fed coupler as reported in ref |8|, appears to be the combination of a directional coupler switch and of a Y junction through which light is launched. This results in - 3 dB built-in optical bias and makes the device free of any electrical DC drift which is regarded to be a problem in most cases for long term operation. Those considerations lead to consider Y-fed directional couplers as very good candidates for very high speed and band pass operation as it will be discussed in the following.
© 1988 Optical Society of America
PDF ArticleMore Like This
Xingyu Zhang, Beomsuk Lee, Che-yun Lin, Alan X. Wang, Amir Hosseini, and Ray T. Chen
CF1A.6 CLEO: Science and Innovations (CLEO:S&I) 2012
T. Pohlmann, A. Neyer, and E. Voges
WD4 Integrated and Guided Wave Optics (IGWO) 1988
R. C. Alferness, C. H. Joyner, and L. L. Buhl
MJ5 Optical Fiber Communication Conference (OFC) 1983