47-fs diode-pumped Yb^3+:CaGdAlO_4 laser

Zaouter, Yoann; Didierjean, Julien; Balembois, François; Lucas-Leclin, Gaëlle; Druon, Frédéric; Georges, Patrick; Petit, Johan; Goldner, Philippe; Viana, Bruno

doi:10.1364/ol.31.000119

Cited by 200 publications

(91 citation statements)

References 10 publications

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“…The maximum pump power is 60 W, of which only a fraction of about 8 W is used in our experiment. The 4-nm broad pump spectrum is centered at around 980 nm, ideally suited to pump Yb-doped CALGO [31][32][33]. The 2-mm long Yb:CALGO crystal is pumped through a dichroic flat end-mirror.…”

Section: -Ghz Dpssl Performance and Optical Setupmentioning

confidence: 99%

Gigahertz frequency comb from a diode-pumped solid-state laser

Klenner¹,

Schilt²,

Südmeyer³

et al. 2014

Opt. Express

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Abstract:We present the first stabilization of the frequency comb offset from a diode-pumped gigahertz solid-state laser oscillator. No additional external amplification and/or compression of the output pulses is required. The laser is reliably modelocked using a SESAM and is based on a diodepumped Yb:CALGO gain crystal. It generates 1.7-W average output power and pulse durations as short as 64 fs at a pulse repetition rate of 1 GHz. We generate an octave-spanning supercontinuum in a highly nonlinear fiber and use the standard f-to-2f carrier-envelope offset (CEO) frequency f CEO detection method. As a pump source, we use a reliable and cost-efficient commercial diode laser. Its multi-spatial-mode beam profile leads to a relatively broad frequency comb offset beat signal, which nevertheless can be phase-locked by feedback to its current. Using improved electronics, we reached a feedback-loop-bandwidth of up to 300 kHz. A combination of digital and analog electronics is used to achieve a tight phase-lock of f CEO to an external microwave reference with a low in-loop residual integrated phase-noise of 744 mrad in an integration bandwidth of [1 Hz, 5 MHz]. An analysis of the laser noise and response functions is presented which gives detailed insights into the CEO stabilization of this frequency comb. Published inOptics Express, 22, issue 25, 31008-31019, 2014 which should be used for any reference to this work 1 11. T. Herr

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Section: -Ghz Dpssl Performance and Optical Setupmentioning

confidence: 99%

Gigahertz frequency comb from a diode-pumped solid-state laser

Klenner¹,

Schilt²,

Südmeyer³

et al. 2014

Opt. Express

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“…% doped crystal [16]. In low-power bulk modelocked lasers, pulses as short as 47 fs with 38 mW average output power [17] and 40 fs with 15 mW [18] were demonstrated. In both cases, extracavity dispersion management was required to reach the shortest pulses.…”

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confidence: 99%

SESAM mode-locked Yb:CaGdAlO_4 thin disk laser with 62 fs pulse generation

et al. 2013

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We present a semiconductor saturable absorber mirror (SESAM) mode-locked thin disk laser (TDL) based on Yb:CaGdAlO 4 (Yb:CALGO) generating 62 fs pulses, which is the shortest pulse duration achieved from mode-locked TDLs to date. The oscillator operates at a repetition rate of 65 MHz and delivers 5.1 W of average output power. The short pulse duration of our TDL in combination with the high intracavity peak power of 44 MW makes this oscillator attractive for intracavity table-top extreme nonlinear optics applications such as high harmonic generation and vacuum ultraviolet frequency comb generation. The current average power was limited by the quality of the Yb:CALGO disk. However, power scaling of Yb:CALGO TDLs to the multi-10-W range with short pulse durations (<100 fs) appears feasible in the near future by using thinner disks of better quality and further optimized SESAMs.OCIS One interesting aspect of TDLs is the high intracavity peak power which can be realized because the output coupler typically has values in the order of 10%. This intracavity peak power should allow for extreme nonlinear frequency conversion such as high harmonic generation (HHG). Realizing those experiments at a high repetition rate in the MHz regime, typically obtained with ultrafast TDLs, is highly desirable for an improved signal-to-noise ratio and to reduce acquisition times in high field laser physics. However, for efficient operation, HHG typically requires peak intensities of >10 13 W∕cm 2 (i.e., peak powers of >30 MW for a spot diameter of 25 μm) in combination with short pulse durations <100 fs [8][9][10] [ Fig. 1(c)]. State of the art mode-locked TDLs are typically based on the well-established gain material Yb:YAG, which has only reached the 200-fs-regime so far with a Kerr lens mode-locked TDL setup [ 11].Therefore, there is a strong research effort in extending the record performance of mode-locked TDLs to the sub-100-fs regime [ Fig. 1(a)], and overcoming the tradeoff between pulse duration and average output power [ Fig. 1(b)] with novel broadband thin disk gain materials that meet the spectroscopic and thermomechanical requirements [12 , 13]. In the past years, many Yb-doped gain materials have been investigated toward this goal. In particular, cubic sesquioxides have demonstrated their

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“…The first modelocking experiments using the promising material Yb:CALGO (Yb:CaGdAlO 4 ) [86,87] in the thin-disk configuration were recently reported [69,88]. This material combines a very broad and smooth emission bandwidth with a thermal conductivity comparable to Yb:YAG (6.5 W·m for 2% doping).…”

Section: State-of-the Art and Recent Experimental Resultsmentioning

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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47-fs diode-pumped Yb^3+:CaGdAlO_4 laser

Cited by 200 publications

References 10 publications

Gigahertz frequency comb from a diode-pumped solid-state laser

Gigahertz frequency comb from a diode-pumped solid-state laser

SESAM mode-locked Yb:CaGdAlO_4 thin disk laser with 62 fs pulse generation

Cutting-Edge High-Power Ultrafast Thin Disk Oscillators

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