Citation:
H Ganser, B Frech, A Jentsch, M Murtz, C Gmachl, F Capasso, DL Sivco, JN Baillargeon, AL Hutchinson, AY Cho, and W Urban. 2001. “Investigation of the spectral width of quantum cascade laser emission near 5.2 mu m by a heterodyne experiment.” OPTICS COMMUNICATIONS, 197, 1-3, Pp. 127-130.