Title :
An integrated optical XY coupler for phase-sensitive optical-power combining and suppression of radiated light
Author :
Vawter, G. Allen ; Hadley, G. Ronald ; Fuchs, Beth ; Wendt, Joel R. ; Klem, John F.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
4/1/1995 12:00:00 AM
Abstract :
We have designed and fabricated a new type of XY coupler for phase-sensitive combining of coherent light in waveguide PIC´s. The XY coupler uses two input waveguides and couples in-phase light into the middle of its three output waveguides. Out-of-phase light is coupled into the two outer waveguides. 15.5-dB extinction ratio is demonstrated in a Mach-Zehnder interferometer using this new XY coupler. Switching from the inner to the outer waveguides at the output is also demonstrated.<>
Keywords :
Mach-Zehnder interferometers; light coherence; light interferometers; optical couplers; optical design techniques; optical fabrication; optical planar waveguides; sensitivity; Mach-Zehnder interferometer; coherent light; extinction ratio; in-phase light coupling; input waveguides; integrated optical XY coupler; out-of-phase light coupling; outer waveguides; output waveguides; phase-sensitive optical-power combining; radiated light suppression; Coupling circuits; Directional couplers; Etching; Integrated optics; Optical coupling; Optical crosstalk; Optical interferometry; Optical waveguides; Semiconductor waveguides; Switches;
Journal_Title :
Photonics Technology Letters, IEEE
