Data are presented demonstrating continuous wave laser operation at -185 degrees C of an InP-InAlGaAs-InAlAs double heterojunction bipolar transistor with strained InGaAs quantum wells incorporated in the p-type base region. The laser exhibits a peak wavelength lambda similar to 1544 nm when biased in the forward active mode in the common-emitter configuration. A threshold current I(B)=10 mA is observed. (C) 2008 American Institute of Physics.