Design and construction of a tunable pulsed Ti:sapphire laser

In this paper, design and construction of a tunable pulsed ti:sapphire laser and numerical solution of the corresponding rate equations are reported. rate equations for a four-level system are written and their numerical solution is examined. furthermore, an optical setup is introduced.in this setup, a ti:sapphire crystal is longitudinally pumped by the second harmonics of a q-switched nd:yag laser, and a prism is used as a wavelengthselective element as well. this setup is established for two 10 and 50 % transmission output couplers. in case of using the 10 % coupler, the output energy of the laser, for the pump energy of 36 mj, is pulses with 3.5 mj energy and for the 50 % coupler, with 50 mj of pump energy, pulses with 10 mj energy are generated. a wavelength tuning range of more than 160 nm is possible. the repetition rate of this laser is 10 hz and the temporal duration of the pulses is about 30 ns.