Suppression of Q-switched mode locking and break-up into multiple pulses by inverse saturable absorption

Schibli, T. R.; Thoen, E.R.; Kärtner, Franz X.; Ippen, E.P.

doi:10.1007/s003400000331

Cited by 109 publications

(52 citation statements)

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“…Although this stability criterion is strictly speaking not valid for high repetition rate lasers, as some of the assumptions made to derive (1) are not fulfilled for multi-GHz lasers, it still can be used to obtain some useful design guidelines. For a more detailed discussion on the influence of additional effects on the QML-threshold such as two-photon absorption or incomplete recovery of the absorber, refer to [22,25,26]. Nevertheless (1) reveals the engineering parameters which can be used to obtain stable mode-locking: the effective mode areas A eff,L in the gain medium and A eff,L on the absorber, which can be influenced by the cavity design of the laser, and the parameters of the saturable absorber, namely the modulation depth R and the saturation fluence F sat,A .…”

Section: Experimental Setups and Resultsmentioning

confidence: 99%

Picosecond diode-pumped 1.5 μm Er,Yb:glass lasers operating at 10–100 GHz repetition rate

et al. 2010

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Stable ultrafast laser sources at multi-GHz repetition rates are important for various application areas, such as optical sampling, frequency comb metrology, or advanced high-speed return-to-zero telecom systems. We review SESAM-mode-locked Er,Yb:glass lasers operating in the 1.5 µm spectral region at multi-GHz repetition rates, discussing the key improvements that have enabled increasing the repetition rate up to 100 GHz. We also present further improved results with shorter pulse durations from a 100 GHz Er,Yb:glass laser. With an improved SESAM design we achieved 1.1 ps pulses with up to 30 mW average output power. Moreover, we discuss for the first time the importance of beam quality deteriorations arising from frequency-degenerate higher order spatial modes in such lasers.

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Section: Experimental Setups and Resultsmentioning

confidence: 99%

Picosecond diode-pumped 1.5 μm Er,Yb:glass lasers operating at 10–100 GHz repetition rate

et al. 2010

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“…It is possible to extend the 'relaxed' regime to rather high frequencies (up to 20 kHz) by operating the system in terms of power and dispersion very close to the multiple pulse break-up. The overshoot after the dumping is limited considerably due to the optimized ratio between spectral filtering and absorber action, as was analyzed in detail in [10]. In this regime the observed pulse to pulse reproducibility is very high.…”

Section: Stability Considerationsmentioning

confidence: 93%

“…The dynamics of a SESAM mode-locked laser can be described in very good approximation by three differential equations [10][11][12], for the temporal dynamics of the pulse envelope, the laser gain and the absorber loss. The master equation of mode-locking, describing the evolution of the pulse's envelope reads …”

Section: Numerical Simulationsmentioning

confidence: 99%

Solitary pulse shaping dynamics in cavity-dumped laser oscillators

Killi¹,

Morgner²

2004

Opt. Express

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Abstract:The pulse shaping dynamics of a diode-pumped laser oscillator with cavity dumping operating in the solitary regime is studied experimentally and numerically. The stability of the laser system is investigated in dependence on the relevant laser parameters. With a stroboscopic detection technique the intracavity temporal and spectral pulse profiles are measured between two dumping events. The results are compared to the numerical analysis of the system. Due to the strong periodic disturbance of the solitary pulse imposed by the dumping process a second set of Kelly-side bands can be identified.

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“…In particular, the additional absorption observed at high fluences caused by induced absorption (IA) causes a "rollover" in reflectivity. Operating the SESAM close to this rollover can lead to multi-pulsing instabilities [43][44][45] because in this case multiple pulses with lower pulse energy can have a gain advantage compared to single pulses. Therefore, the most crucial parameters of SESAMs for high-power oscillators are: -large saturation fluences to operate at moderate saturation parameters and with small spot sizes, which relaxes cavity sensitivity to alignment and possible thermal lensing, -high damage thresholds, -low nonsaturable losses to avoid thermal effects, -reduced induced absorption (IA), which is responsible for the reflectivity rollover at high fluences and can lead to multi-pulsing instabilities [43][44][45].…”

Section: Sesams In High-power Ultrafast Oscillatorsmentioning

confidence: 99%

Cutting-Edge High-Power Ultrafast Thin Disk Oscillators

et al. 2013

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A growing number of applications in science and industry are currently pushing the development of ultrafast laser technologies that enable high average powers. SESAM modelocked thin disk lasers (TDLs) currently achieve higher pulse energies and average powers than any other ultrafast oscillator technology, making them excellent candidates in this goal. Recently, 275 W of average power with a pulse duration of 583 fs were demonstrated, which represents the highest average power so far demonstrated from an ultrafast oscillator. In terms of pulse energy, TDLs reach more than 40 μJ pulses directly from the oscillator. In addition, another major milestone was recently achieved, with the demonstration of a TDL with nearly bandwidth-limited 96-fs long pulses. The progress achieved in terms of pulse duration of such sources enabled the first measurement of the carrier-envelope offset frequency of a modelocked TDL, which is the first key step towards full stabilization of such a source. We will present the key elements that enabled these latest results, as well as an outlook towards the next scaling steps in average power, pulse OPEN ACCESSAppl. Sci. 2013, 3 356 energy and pulse duration of such sources. These cutting-edge sources will enable exciting new applications, and open the door to further extending the current performance milestones.

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Suppression of Q-switched mode locking and break-up into multiple pulses by inverse saturable absorption

Cited by 109 publications

References 0 publications

Picosecond diode-pumped 1.5 μm Er,Yb:glass lasers operating at 10–100 GHz repetition rate

Picosecond diode-pumped 1.5 μm Er,Yb:glass lasers operating at 10–100 GHz repetition rate

Solitary pulse shaping dynamics in cavity-dumped laser oscillators

Cutting-Edge High-Power Ultrafast Thin Disk Oscillators

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