J. A. Massengale, Y. Shen, R. Q. Yang, T. D. Mishima, Michael B. Santos, S. D. Hawkins, and J. F. Klem, “Progress in interband cascade lasers with advanced waveguides”, talk 12440-17 at Novel In-Plane semiconductor Lasers XXII at Photonics West, San Francisco, CA, Jan. 31, 2023.