Fiber laser pumped tunable Cr2+:ZnSe laser

A 2.4 μm room-temperature continuous-wave Cr 2+ :ZnSe laser pumped by a Thulium Fiber Laser is experimentally investigated. The laser delivers up to 720 mW of output power with absorbed power slope efficiency of 52%. The laser is tunable from 2294 to 2678 nm. Gain-switching is also demonstrated by using a Pulsed Erbium Fiber Laser pump source. A maximum pulse energy of 0.36 μJ is achieved with an absorbed threshold of 0.28 μJ and an absorbed power slope efficiency of 41%.