Stable dual-wavelength Q-switched Nd:YAG laser using a two-step energy extraction technique

Abstract

The generation of stable dual-wavelength pulses from an actively Q-switched Nd:YAG laser operating at 1064 and 1319 nm was demonstrated. Pulse energies of the dual-wavelength laser were extracted by two temporally separated stimulated-emission processes for a single pumping process, thereby avoiding line competition between the two laser transitions. Total energy of the order of 20 mJ was achieved for the two pulses, and the ratio of the pulse energies of the two lasers could be selected by adjusting the output couplings. The pulse-to-pulse fluctuations for the lasers operating at 1319 and 1064 nm were 4.7%-4.8% and 1.5%-2.6%, respectively, which were almost equivalent to those for a single emission line in our system. The experimentally observed laser performance agreed reasonably well with theoretical predictions.

Determination of contaminant ablation parameters on OHP sheets using an Nd:YAG laser and its application in laser cleaning

“…Se utilizó el modo de operación Q-switch, lo que permite que la energía por pulso del láser pueda ser variada mediante el tiempo de retraso teniendo pulsos cortos del orden de 4 a 6 ns [20,21]. Un a ventaja de usar el modo de operación Q-switch es que nos permite variar la energía por pulso mediante la variación del tiempo de retraso (delay) [22], este procedimiento fue usado satisfactoriamente por Langrock [23] y West [24]. La Fig.…”

Partially end-pumped 1319 nm Nd:YAG slab laser

“…So that the beam quality deteriorates sharply and the output power is limited, even causing the damage to the gain media. With the slab laser media proposed, theoretical and experimental studies have shown that slab structure can greatly increase heat dissipation and effectively reduce thermal effects, thus achieving high power and high beam quality laser output [9][10][11] . Among various slab lasers, partially end-pumped slab lasers are of particular interest.…”

1064/1319 nm Dual-Wavelength Alternating Electro-Optic Q-Switched Laser Based on the Common Q-Switching Bias Voltage

“…Compared with the dual-wavelength pulse laser achieved by acoustic-optic or passive Q-switched technology, the dual-wavelength pulse laser obtained by EO Q-switched technology has the virtues of high peak power, high stability and a narrower pulse width. Based on this, EO Q-switched dual-wavelength lasers have wide applications in nonlinear frequency conversion, laser drilling, laser spectroscopy, laser ranging and other fields [1][2][3][4][5]. However, at present, the dual-wavelength pulse lasers obtained by EO Qswitched technology are output at the same time, which greatly limits its applications [6][7][8].…”