The nanosecond self-pulsing operation of a midinfrared solid-state laser with no additional passive absorbers is reported in this paper. A proof-of-principle demonstration of the cooperatively enhanced reabsorption method. in which two laserdiode-pumped erbium gain media share the same laser resonator. is proposed. https://www.roamingfreesims.com/product-category/tridonic-em-t5-basic/