Title :
Wavelength division multiplexer with photoinduced Bragg gratings fabricated in a planar-lightwave-circuit-type asymmetric Mach-Zehnder interferometer on Si
Author :
Hibino, Y. ; Kitagawa, T. ; Hill, K.O. ; Bilodeau, F. ; Malo, B. ; Albert, J. ; Johnson, D.C.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
Abstract :
A planar-lightwave-circuit (PLC)-type wavelength division multiplexer with photoinduced Bragg gratings is successfully fabricated on Si. The Bragg gratings are formed in the arms of an asymmetric four-port Mach-Zehnder interferometer (MZI). We demonstrate that signals with three wavelengths can be demultiplexed to three output ports. Heaters are used to compensate for the phase error in the MZI and to switch the output ports. An insertion loss at a Bragg wavelength of 1534.78 nm can be changed from 1.5 to about 19 dB by controlling the heater, indicating that photoinduced Bragg gratings are useful for expanding PLC functions.
Keywords :
Mach-Zehnder interferometers; diffraction gratings; integrated optics; multiplexing equipment; optical communication equipment; silicon; wavelength division multiplexing; 1.5 to 19 dB; 1534.78 nm; Si; asymmetric Mach-Zehnder interferometer; heaters; insertion loss; phase error; photoinduced Bragg gratings; planar-lightwave-circuit; wavelength division multiplexer; Arm; Bragg gratings; Extinction ratio; Optical fiber polarization; Optical fibers; Optical waveguides; Programmable control; Switches; Wavelength division multiplexing; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
