Diode-pumped ultrashort-pulse generation based on Yb^3+:Sc_2O_3 and Yb^3+:Y_2O_3 ceramic multi-gain-media oscillator

Tokurakawa, Masaki; Shirakawa, Akira; Ueda, Ken–ichi; Yagi, Hideki; Meichin, Noriyuki; Yanagitani, Takahiko; Kaminskii, Alexander A.

doi:10.1364/oe.17.003353

Cited by 103 publications

(43 citation statements)

References 27 publications

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“…So far there have been more than ten Yb-doped host materials that generated sub-100-fs pulses in a standard bulk gain medium mode-locked laser oscillator design (see Table 2). Average output power levels of up to 1.5 W were obtained [17]. Unfortunately, it is usually not possible to directly transfer these results to an efficient high-power mode-locked ultrafast thin disk laser.…”

Section: Introductionmentioning

confidence: 99%

High-power ultrafast thin disk laser oscillators and their potential for sub-100-femtosecond pulse generation

et al. 2009

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Ultrafast thin disk laser oscillators achieve the highest average output powers and pulse energies of any mode-locked laser oscillator technology. The thin disk concept avoids thermal problems occurring in conventional high-power rod or slab lasers and enables high-power TEM 00 operation with broadband gain materials. Stable and self-starting passive pulse formation is achieved with semiconductor saturable absorber mirrors (SESAMs). The key components of ultrafast thin disk lasers, such as gain material, SESAM, and dispersive cavity mirrors, are all used in reflection. This is an advantage for the generation of ultrashort pulses with excellent temporal, spectral, and spatial properties because the pulses are not affected by large nonlinearities in the oscillator. Output powers close to 100 W and pulse energies above 10 µJ are directly obtained without any additional amplification, which makes these lasers interesting for a growing number of industrial and scientific applications such as material processing or driving experiments in high-field science. Ultrafast thin disk lasers are based on a power-scalable concept, and substantially higher power levels appear feasible. However, both the highest power levels and pulse energies are currently only achieved with Yb:YAG as the gain material, which limits the gain bandwidth and therefore the achievable pulse duration to 700 to 800 fs in It is important to evaluate their suitability for power scaling in the thin disk laser geometry. In this paper, we review the development of ultrafast thin disk lasers with shorter pulse durations. We discuss the requirements on the gain materials and compare different Yb-doped host materials. The recently developed sesquioxide materials are particularly promising as they enabled the highest optical-tooptical efficiency (43%) and shortest pulse duration (227 fs) ever achieved with a mode-locked thin disk laser.

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Section: Introductionmentioning

confidence: 99%

High-power ultrafast thin disk laser oscillators and their potential for sub-100-femtosecond pulse generation

et al. 2009

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“…Among them, scandium and its scandium oxide (Sc 2 O 3 ) have currently high commercial interest and are extensively used in the production of alloys, ceramics, magnetism, laser, etc. [5][6][7][8]. Because of the technology limitations and relative enrichment after iron and niobium separations, the grade of the rare earth oxides (RE 2 O 3 ) in Bayan Obo tailings produced by the concentrator of Baotou Iron and Steel Co. Ltd reached a level of economic value.…”

Section: Introductionmentioning

confidence: 99%

Separation of Sc2O3 from Bayan Obo tailings through an innovative roasting method

Bao

Wang

et al. 2015

Rare Met.

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Sc 2 O 3 was successfully extracted and separated from Bayan Obo tailings by a CaCl 2 -reductive carbon powder-combinative roasting method. The optimum process condition was obtained through adjusting specific effect factors. It is found that Sc 2 O 3 with the ratio of 87.51 % is leached out under roasting temperature of 800°C for 2 h through adding 73 % CaCl 2 , and 20 % reductive carbon powder with liquid to solid ratio of 3. Moreover, the specific reaction mechanism during roasting process was investigated by thermogravimetric-differential scanning calorimetry (TG-DSC) and X-ray diffraction (XRD) techniques. The results show that the main phases (SiO 2 , CaF 2 and NaFeSi 2 O 6 ) as well as important phases (LiScSi 2 O 6 , REFCO 3 and REPO 4 ) would turn into new phases (CaFeSiO 4 , Fe, Ca 3 (PO 4 ) 2 , NaCl, RE 2 O 3 and Sc 2 O 3 ) after complicated reactions, which effectively break up the original mineral compositions and activate the existing state of containing scandium matter, consequently facilitating the subsequent hydrochloric acid leaching process.

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“…Therefore, this combination allows for working with gain materials that exhibit moderate emission bandwidths but high thermal conductivities while reaching out for shorter pulse durations. To date this concept has been successfully implemented in oscillator and amplifier systems: A laser oscillator based on bulk ceramic Yb:ScO and Yb:Y 2 O 3 (Yb:YO) gain media delivered 53 fs pulses with an output power of 1 W [21] and the modelocking of a dual-gain Nd:glass laser yielded 38-fs pulses at 40 mW of output power [22]. The combined gain spectra of a regenerative thin disk amplifier generated sub-200 fs pulses with an energy of 500 µJ [23].…”

Section: Introductionmentioning

confidence: 99%

Dual-gain SESAM modelocked thin disk laser based on Yb:Lu_2O_3 and Yb:Sc_2O_3

et al. 2014

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Abstract:We present for the first time a SESAM-modelocked thin-disk laser (TDL) that incorporates two gain materials with different emission spectra in a single TDL resonator. The two gain media used in this experiment are the sesquioxide materials Yb:Lu 2 O 3 and Yb:Sc 2 O 3 , which have their spectral emission peak displaced by ≈7 nm. We can benefit from a combined gain bandwidth that is wider than the one provided by a single gain material alone and still conserve the excellent thermal properties of each disk. In these first proof-of-principle experiments we demonstrate pulse durations shorter than previously achieved with the single gain material Yb:Lu 2 O 3 . The oscillator generates pulses as short as 103 fs at a repetition rate of 41.7 MHz and a center wavelength of around 1038 nm, with an average output power of 1.4 W. A different cavity layout provides pulses with a duration of 124 fs at an output power of 8.6 W. This dual-gain approach should allow for further power scaling of TDLs and these first results prove this method to be a promising new way to combine the record output-power performance of modelocked TDLs with short pulse durations in the sub-100 fs regime. Matuschek, and J. Aus der Au, "Semiconductor saturable absorber mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers," IEEE J. Sel. Top. Quantum Electron. 2(3), 435-453 (1996). 2. A. Giesen, H. Hügel, A. Voss, K. Wittig, U. Brauch, and H. Opower, "Scalable concept for diode-pumped highpower solid-state lasers," Appl. Phys. B 58(5), 365-372 (1994). Published in Optics Express, 22, issue 16, 18979-18986, 2014 which should be used for any reference to this work 1 Stolow, U. Thumm, and M. J. J. Vrakking, "What will it take to observe processes in 'real time'?" Nat. Photonics 8(3), 162-166 (2014

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Diode-pumped ultrashort-pulse generation based on Yb^3+:Sc_2O_3 and Yb^3+:Y_2O_3 ceramic multi-gain-media oscillator

Cited by 103 publications

References 27 publications

High-power ultrafast thin disk laser oscillators and their potential for sub-100-femtosecond pulse generation

High-power ultrafast thin disk laser oscillators and their potential for sub-100-femtosecond pulse generation

Separation of Sc2O3 from Bayan Obo tailings through an innovative roasting method

Dual-gain SESAM modelocked thin disk laser based on Yb:Lu_2O_3 and Yb:Sc_2O_3

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