Abstract
We demonstrate a common diode-pumped Q-switched Tm/Ho composite laser with a developed compact hybrid cavity, where the lasing wavelengths were changeable between Ho laser and Tm laser via modulating the cavity losses by changing transmittances of the crystalline Cr:ZnSe saturable absorbers (SAs) or using the output couplers between broad band coating and narrow band coating. Using a common 808 nm diode laser as the pump source, maximum Q-switched Ho laser power of 707 mW at 2091 nm, with pulse energy of 50.7 μJ and peak power of 99 W at 13.4 KHz was obtained among using the NCs. Among the BCs, maximum Q-switched Tm laser power of 413 mW at 2011 nm, with pulse energy of 35 μJ and peak power of 104 W at 11.7 kHz was obtained. Combing both advantages of Tm laser and Ho laser, a wide scope of applications including detection, commutation, and medical treatments are expected from the proposed laser source due to its accessibility, multifunction and miniaturization.
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