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M. Ciofini E. Favilla A. Lapucci E. Sani A. Capanni L. Tommasi 《Applied physics. B, Lasers and optics》2008,92(3):431-438
We report on the design and preliminary development of a micro laser (MILD) breadboard (BB). The laser source is designed
to be used as the transmitter unit of a laser altimeter for planetary investigations. The reference scenario is the ESA BepiColombo
mission to Mercury (presently scheduled to be launched in 2012) but possible applications to minor solar system bodies may
be included.
In order to fulfil the laser source requirements for this kind of application we adopted a master-oscillator-power-amplifier
(MOPA) scheme. Analysis of the MO efficiency, pulse duration and beam characterisation in different resonator configurations
is described together with the preliminary PA performance on a ± 10 °C temperature range.
PACS 42.55.Xi; 42.60.By; 42.60.Da 相似文献
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Using the same radio-frequency excited slab device, we have comparatively studied two different optical schemes defining a stable multipass resonator and a hybrid stable–unstable resonator. A thorough analysis of the beams extracted from the two laser setups shows that the stable folded resonator can produce a quasi-TEM00 output, at a variance with the hybrid stable–unstable resonator which always generates undesired low-power side lobes. 相似文献
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We present the measurements made on a medium power, 35 cm long, radio-frequency discharge CO2 slab laser operated in a pulsed regime obtained by switching the RF discharge. In this way, pulses with peak power up to 480 W at pulse repetition frequencies in the range 1 to 10 kHz have been obtained. Pulse energy and average extracted power have been experimentally characterized with respect to the pulse repetition frequency and to the pulse duration, and the pulse shape and characteristic times have been measured. We also investigated the propagation properties of the beam emerging from our laser. 相似文献
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We analyze the propagation properties of the beam extracted from a diode pumped ceramic Nd:YAG slab laser adopting a hybrid stable–unstable resonator. Such a resonator produces a beam characterized by an Hermite–Gauss mixture-like distribution in one transverse direction and a hard-edge diffracted distribution on the other transverse direction. The beam propagation parameters Mx2 and My2 are measured for different values of the diodes driving current. We obtain a beam parameter product smaller than 3 mm mrad in both transverse directions and in the whole range of powers, up to an extraction of 220 W in a QCW regime. 相似文献
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Civitelli Enrico Lapucci Matteo Schoen Fabio Sortino Alessio 《Computational Optimization and Applications》2021,80(1):1-32
Computational Optimization and Applications - In this paper, the problem of best subset selection in logistic regression is addressed. In particular, we take into account formulations of the... 相似文献
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