Optimal performances of a mode-locking technique: Theoretical and experimental investigations of the frequency-doubling nonlinear mirror

Mani, A. A.; Lis, Dan; Caudano, Yves; Thiry, P.A.; Péremans, A.

doi:10.1016/j.optcom.2010.08.071

Cited by 3 publications

(3 citation statements)

References 31 publications

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“…The combination of high intensities and high nonlinearities suggest the appearance of nonlinear mode-locking due to cascaded nonlinearities, such as NLM, polarization switched mode-locking or Kerr-lens mode-locking, as has been reported by various groups [16][17][18][19][20].…”

Section: Instable Regime: Nlmmentioning

confidence: 68%

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Gain broadening and mode-locking in overcoupled second harmonic Q-switched microsecond pulses

Rohde¹,

Brinkmann²

2014

J. Opt.

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An intracavity frequency doubled, Q-switched Nd:YLF emitting at a wavelength of 527 nm was designed with the goal to temporally stretch the Q-switched pulses up to some microseconds at pulse energies of several millijoules. With different resonator configurations pulse durations between 12 μs and 3 μs with energies of 1 mJ-4.5 mJ have been achieved, which is demanded for an application in ophthalmology. For tighter intracavity foci and high pump power, however, strong power modulations by trains of picosecond pulses on the rear flank of the microsecond pulses were observed, indicating the occurrence of cascading nonlinearities and mode-locking. Simultaneously a significant increase of the fundamental spectrum up to 5 nm was found. A similar effect, which is referred to as gain broadening, has previously been observed by using ppKTP for intracavity second harmonic generation. This is, to the best of our knowledge, the first observation of this effect with unpoled second harmonic media.

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Section: Instable Regime: Nlmmentioning

confidence: 68%

“…A special application of intracavity SHG is the NLM technique, which is used to generate passively mode-locked pulses. It was first reported by Stankov et al in 1989 [15] and since that time it was further investigated by various groups [16][17][18][19][20].…”

Section: Nonlinear Mirror Mode-locking (Nlm)mentioning

confidence: 97%

Gain broadening and mode-locking in overcoupled second harmonic Q-switched microsecond pulses

Rohde¹,

Brinkmann²

2014

J. Opt.

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“…Here, we present the first TDL modelocked by the frequency-doubling nonlinear-mirror (FD-NLM) modelocking technique [4,5]. In this proof-of-principle result we achieve 21 W of average power with 324-fs pulses and, in another configuration, 28 W with 600-fs pulses from an Yb:YAG TDL.…”

Section: Introductionmentioning

confidence: 93%

Nonlinear-Mirror Modelocked Thin-Disk Laser Delivering 21 W Average Power with 324-fs Pulses

Saltarelli

Diebold

Graumann

et al. 2017

Laser Congress 2017 (ASSL, LAC)

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Modelocking of a thin-disk laser with the frequency-doubling nonlinear-mirror technique

Saltarelli¹,

Diebold²,

Graumann³

et al. 2017

Opt. Express

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We demonstrate a frequency-doubling nonlinear-mirror (NLM) modelocked thin-disk laser. This modelocking technique, composed of an intracavity second harmonic crystal in combination with a dichroic output coupler, offers robust operation decoupled from cavity stability (as in semiconductor saturable absorber mirror (SESAM) modelocking) combined with an ultrafast saturable loss and high modulation depth (as in Kerr-lens modelocking (KLM)). With our NLM diode-pumped Yb:YAG thin-disk laser we achieve 21 W of average power at 323-fs pulse duration, which is an order of magnitude shorter than the previously obtained duration with the same technique in bulk lasers. Using these first results, we present a theoretical model for the NLM technique, which accurately predicts its loss modulation properties and the shortest achievable pulse duration without relying on any fitting parameters. Based on this simulation, we expect that the NLM technique will enable thin-disk lasers with average power of more than 100 W, with potentially sub-200 fs pulses. This could potentially solve the pulse duration limitations with SESAM modelocked Yb:YAG thin-disk lasers without imposing strong cavity stability constraints such as in KLM.

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Optimal performances of a mode-locking technique: Theoretical and experimental investigations of the frequency-doubling nonlinear mirror

Cited by 3 publications

References 31 publications

Gain broadening and mode-locking in overcoupled second harmonic Q-switched microsecond pulses

Gain broadening and mode-locking in overcoupled second harmonic Q-switched microsecond pulses

Nonlinear-Mirror Modelocked Thin-Disk Laser Delivering 21 W Average Power with 324-fs Pulses

Modelocking of a thin-disk laser with the frequency-doubling nonlinear-mirror technique

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