An effect of a pump pulse rising edge on the QCL build-up time: the analytical approach. - Vrubel, Ivan I.; Cherotchenko, Evgeniia D.; Kusakina, Ksenia V.; Abdulrazak, Sausan H.; Dudelev, Vladislav V.; Sokolovskii, Grigorii S. (Applied Physics B: Lasers & Optics, 2025)