Comparison of laser generation in thermally bonded and unbonded Er3+,Yb3+:glass/Co2+:MgAl2O4 microchip lasers

Abstract

a b s t r a c tPulse laser generation in several Er 3+ ,Yb 3+ :glasses thermally bonded with Co 2+ :MgAl 2 O 4 was achieved. Peak power in the range of 1.83-7.68 kW with pulse duration between 2.9 and 4.2 ns and energy up to 24 lJ was obtained. The output characteristics for different transmissions of the output couplers were investigated. To show the improvements gained by the thermal bonding procedure, a comparison of thermally bonded and unbonded samples was done in terms of generation efficiency, peak power, beam quality, generated spectra and pulse to pulse jitter.

Performance analysis of thermally bonded Er3+, Yb3+:glass/Co2+:MgAl2O4 microchip lasers

“…In the second experiment, described in more details in paper (Belghachem and Mlynczak 2015), the same glass samples were used as in the previous experiment. The saturable absorber MALO with small signal transmission equal to 97.5 % and the length equal to 0.29 mm was put inside the resonator and pulse generation was examined.…”

“…This experiment was also described in more details in paper (Belghachem and Mlynczak 2015). The saturable absorbers used in this case had the same small signal transmission equal to 97.5 % and the same length 0.29 mm.…”

“…ions (MALO) has proved to be the best saturable absorber Mlynczak et al 2012;Karlsson et al 2000). Very promising technology to improve the peak power, quality of the output beam as well as simplify the construction of such lasers is thermal bonding of the active medium with the saturable absorber (Mlynczak and Belghachem 2015a, b;Belghachem and Mlynczak 2015).…”