上一条：S. Vasilyev, S. Schiller, A. Nevsky, A. Grisard, D. Faye, E. Lallier, Z. Zhang, A. J. Boyland, J. K. Sahu, M. Ibsen, and W. A. Clarkson, "A broadly tunable single-frequency cw source in the 8 µm region with milliwatt-level output based on difference frequency generation in orientation-patterned GaAs", Optics Letters 33, 1413-1415 (2008)