Title :
Polarization independent InP WDM multiplexer/demultiplexer module
Author :
Gini, Emilio ; Hunziker, Werner ; Melchior, Hans
Author_Institution :
Inst. of Quantum Electron., Zurich, Switzerland
fDate :
4/1/1998 12:00:00 AM
Abstract :
We report the design, fabrication, packaging, and characterization of a polarization independent integrated optical InP multiplexer/demultiplexer module. The device is based on a vertically etched diffractive grating and separates four channels with 4 spacing in the 1.55 μm window. An n-/n+-InP layer structure with very low birefringence results in a shift of the passbands between transverse electric (TE) and transverse magnetic (TM) polarization of less than 0.1 nm. With a self-aligned flip-chip mounting technique light is optically coupled from the input and output waveguides to an array of lensed single mode fibers with a coupling efficiency of more than 80%. The packaging includes temperature control that allows fine tuning of the channel passbands over 5 nm. Optical crosstalk is always better than -17 dB and fiber to fiber losses of 15 dB are achieved. The module has been successfully implemented in a 4×2.5 Gb/s WDM transmission system
Keywords :
III-V semiconductors; demultiplexing equipment; diffraction gratings; flip-chip devices; indium compounds; integrated optics; lenses; light polarisation; multiplexing equipment; optical communication equipment; optical design techniques; optical fabrication; optical fibre losses; packaging; wavelength division multiplexing; 1.55 mum; 15 dB; 80 percent; InP layer structure; InP polarisation independent WDM multiplexer/demultiplexer module; TE polarisation; TM polarization; WDM transmission system; channel passbands; coupling efficiency; fiber to fiber losses; fine tuning; lensed single mode fiber array; optical communications equipment; optical crosstalk; optical design; optical fabrication; optically coupled light; packaging; polarization independent integrated optical InP multiplexer; self-aligned flip-chip mounting technique; temperature control; vertically etched diffractive grating; very low birefringence; Indium phosphide; Optical arrays; Optical coupling; Optical crosstalk; Optical fiber polarization; Optical polarization; Optical waveguides; Packaging; Passband; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
