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Direct amplification of a nanosecond laser diode in a high-gain diode-pumped Nd:YVO4 amplifier

Abstract : We demonstrate that Nd:YVO4 can efficiently amplify a nanosecond laser diode in a very simple double-pass configuration. Based on longitudinal pumping with a high brightness fiber-coupled laser diode at 808 nm (60 W, 100 μm, 0.22 NA) and a low Nd-doped (0.2%) temperature controlled Nd:YVO4 we achieved an optical gain of 62 dB with very low (<2%) parasitic laser emission and an average output power of 10 W. At 15 kHz, we observed a strong gain saturation dynamic resulting in a pulse duration reduction from 100 to 3.5 ns. This effect enhances the peak power by a factor of 18 (130 kW) with an energy of 620 μJ.
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Submitted on : Tuesday, September 30, 2014 - 3:46:33 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:40 PM
Long-term archiving on: : Wednesday, December 31, 2014 - 11:05:50 AM

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Xavier Délen, François Balembois, Patrick Georges. Direct amplification of a nanosecond laser diode in a high-gain diode-pumped Nd:YVO4 amplifier. Optics Letters, Optical Society of America, 2014, 39 (4), pp.997-1000. ⟨10.1364/OL.39.000997⟩. ⟨hal-01070107⟩

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