Diode-pumped passively mode-locked sub-picosecond Yb:LuAG ceramic laser

Abstract

In this paper the laser activities of a diode-pumped Yb:LuAG ceramic which was prepared by the solid-state reactive sintering method were reported. The maximum output power was 1.86 W in the continuous wave (CW) laser operation, corresponding to a slope efficiency of 53.6%. The CW laser could be tuned from 1030 to 1096 nm by inserting a prism in the cavity. With the assist of a semiconductor saturable absorber mirror (SESAM), passive mode-locking was realized, delivering sub-picosecond pulses with 933 fs duration and an average power of 532 mW at a repetition rate of 90.35 MHz.

Pump pulse characteristics of quasi-continuous-wave diode-side-pumped Nd:YAG laser

“…5. Measured and simulated results of conversion efficiency as a function of pump pulse duration for pump power of 146 W and duty cycle of 12%: the red curve is the simulation without ASE, the black curve is the simulation with ASE, the blue dots are the measurement, and the green dot curve is the fitting with modified equation (6).…”

“…Diode-pumped Nd:YAG solid-state laser, along with its advantages of high efficiency, high reliability, compactness, and long operation time, [1][2][3][4] has a wide range of applications in industry, science and basic research. [5][6][7] To date, the characteristics of the Nd:YAG laser have been widely studied to obtain high power output. For instance, Yu et al and Wang et al have experimentally investigated the influence of different output couplings, cavity lengths, types of cavities, and the temperatures of cooling water on the laser output power and beam quality of continuous-wave (CW) Nd:YAG laser.…”

Instability and Ultra-high frequency spectrum pulse train in passively Q-switched Yb: LuAG ceramic laser

“…Yb: LuAG ceramics are simpler to synthesize than single crystal materials, and the size is not strictly controlled. In terms of optical quantum e ciency, Yb: LuAG ceramics with highly doped Yb3 + have higher optical quantum e ciency and are not easily saturated with light quantum [15]. Laser diode-pumped passively Q-switched lasers have various designs and extensive research, and can output high peak power pulse trains at high repetition frequency.…”

“…The overall structure of LuAG ceramics includes single center, multi-center, rare ions (mainly solid solutions), and partially disordered crystal eld garnets [22]. The laser gain material synthesized by Yb particles embedded in the LuAG substrate retains the LuAG polycenter structure, which is re ected in the absorption spectrum showing multiple absorption peaks [15,23]. However, in order to observe the multilongitudinal mode caused by the material structure in the Q-switched laser, the size design of the Qswitched laser resonator is strict.…”

Yb:CaF2–YF3 transparent ceramics ultrafast laser at dual gain lines

“…[21][22][23][24][25][26][27] On account of above advantages, ceramics are expected to be a powerful alternative to crystals, which may rise to the occasion of ultrafast and high-power lasers. [28,29] However, even at low doping concentration, Yb 3+ ions easily form clusters in CaF 2 host, which can reduce the luminescence capabilities and quantum efficiency. Introducing buffer ions into CaF 2 to manipulate the spectral properties can effectively solve this problem.…”