Pulse generation at 1.5-μm wavelength in new EAT14 glasses doped with Er3+ and Yb3+ ions

Abstract

The paper describes investigation of pulse laser generation in newly developed EAT14 glasses with the use of MALO saturable absorber. Different initial transmission of the saturable absorbers and different transmission of the output coupler were investigated. The laser generation was carried out using 976-nm pump wavelength. Comparison of peak powers, slop efficiencies and thresholds was made with a view to choose the best set of glass and saturable absorber for “eye-safe” microchip laser range-finder. The generated wavelengths by each sample were measured.

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

“…Recently the use of these lasers in teledetection systems (rangefinders/Lidar) has largely increased. Thus there is an intensive research work to improve the output performances of the microchip eye safe lasers, especially the peak power and the beam quality [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Practical application of cross correlation technique to measure jitter of master-oscillator-power-amplifier (MOPA) laser system

“…One of the well−known ways to investigate them is the pump−and−probe technique [1][2][3][4][5][6][7][8][9]. This technique had not been used so widely in this field before different lasers generating short pulses of elec− tromagnetic radiations were developed [10][11][12][13][14]. Not until then were special facilities built at SLAC National Acceler− ator Laboratory (SLAC) where scientists carry out such experiments.…”

Practical application of pulsed “eye-safe” microchip laser to laser rangefinders

“…In designing and build− ing the rangefinder, the economic and utilitarian aspects were taken into account as well as the following requi− rements: l emitted radiation should be eye−safe (according to the international standard IEC 60825-1 the maximal energy density on the iris, at a 1535−nm wavelength and pulse duration several ns, is 10000 J/m 2 ; l range of distance measurement up to 10 km; l no active cooling of active media and pumping diode (construction of the rangefinder is much simpler); l separate active medium and saturable absorber constitut− ing laser resonator (the only possible solution as ther− mally bounded active media with saturable absorber are not commercially available); l divergence of a laser beam at the output of transmitting optics of 0,5 mrad (so as to ensure an enough overlap of the laser beam and the detector field of view at a short dis− tance, feasible adjustment and to be comparable with the standard NATO target whose dimensions are 2.3×2,3 m); l detector's field of view of 1 mrad (so as to ensure small background noise and feasible adjustment it is usually assumed to be 2 times higher than the divergence of the laser beam); l working temperature of 5-5°C; l measurement time up to 300 ms (assuming the target moving with velocity of 50 km/h perpendicular to the di− rection of measurement, it needs about 300 ms to cover the distance of 5 m -the diameter of the laser beam at a distance of 10 km). The experiments dealing with investigations of the active media and the saturable absorbers used to build the microchip laser were already described in papers [14,15].…”