PRECISION TUNABLE INFRARED SOURCE AT 10 μM: CO 2 -LASER/MICROWAVE-SIDEBAND SYSTEM WITH AN EVENSON CO 2 LASER AND A CHEO WAVEGUIDE MODULATOR Zhen-Dong Sun, 1 R. M. Lees, 1 Li-Hong Xu, † M. Yu. Tretyakov, 1,2 and Ivan Yakovlev 2 1 Canadian Institute for Photonic Innovations and Department of Physical Sciences University of New Brunswick Saint John, NB, E2L 4L5, Canada 2 Visiting Scientists from Institute of Applied Physics Russian Academy of Sciences Nizhny Novgorod, Russia Received August 20, 2002 International Journal of Infrared and Millimeter Waves, Vol. 23, No. 11, November 2002 (© 2002) 1557 0195-9271/02/1100-1557/0 © 2002 Plenum Publishing Corporation