Title :
Bending of a planar lightwave circuit 2×2 coupler to desensitize it to wavelength, polarization, and fabrication changes
Author :
Doerr, C.R. ; Cappuzzo, M. ; Chen, E. ; Wong-Foy, A. ; Gomez, L. ; Griffin, A. ; Buhl, L.
Author_Institution :
Lucent Technol., Bell Labs., Holmdel, NJ, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
We present a planar lightwave circuit curved 2×2 coupler. Its splitting ratio has a low sensitivity to wavelength, polarization, and fabrication yet is low-loss and compact. We present simple formulae for its design. We demonstrate a 50/50 version in silica-on-silicon waveguides. We discuss the tradeoff between amplitude accuracy and phase accuracy in such densensitized couplers.
Keywords :
bending; integrated optics; optical design techniques; optical directional couplers; optical fibre couplers; optical fibre fabrication; optical fibre losses; optical fibre polarisation; optical waveguide theory; silicon; silicon compounds; 2×2 coupler; SiO2-Si; amplitude accuracy; bending; desensitized couplers; low sensitivity; low-loss lightwave circuit; optical design; optical fabrication changes; phase accuracy; planar lightwave circuit; polarization desensitization; silica-on-silicon waveguides; splitting ratio; wavelength desensitization; Coupling circuits; Directional couplers; Fabrication; Optical coupling; Optical devices; Optical filters; Optical interferometry; Optical polarization; Optical waveguide theory; Optical waveguides; Optical components; optical device fabrication; optical planar waveguide couplers; optical planar waveguides; optical waveguide theory;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.846922
