Comparative study of multioctave supercontinuum generation in fused silica, YAG, and LiF in the range of anomalous group velocity dispersion

Garejev, N.; Tamošauskas, G.; Dubietis, A.

doi:10.1364/josab.34.000088

Cited by 46 publications

(13 citation statements)

References 46 publications

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“…Experiments on self-focusing and filamentation in fused silica of few optical cycle pulses with carrier wavelengths of 2 μm [161] and 2.2 μm [162] reported ultrabroad SC spectra starting from 400 and 370 nm, respectively, and extending to wavelengths greater than 2.5 μm. More recently, the recorded dynamics of spectral broadening in fused silica with the pump wavelength of 2.3 μm versus the input pulse energy revealed that under given experimental conditions there exists the optimum pump pulse energy to obtain the broadest SC spectrum [163] (see Fig. 12(a)).…”

Section: ]mentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

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167

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Nonlinear propagation of intense femtosecond laser pulses in bulk transparent media leads to a specific propagation regime, termed femtosecond filamentation, which in turn produces dramatic spectral broadening, or superbroadening, termed supercontinuum generation. Femtosecond supercontinuum generation in transparent solids represents a compact, efficient and alignment-insensitive technique for generation of coherent broadband radiation at various parts of the optical spectrum, which finds numerous applications in diverse fields of modern ultrafast science. During recent years, this research field has reached a high level of maturity, both in understanding of the underlying physics and in achievement of exciting practical results. In this paper we overview the state-of-the-art femtosecond supercontinuum generation in various transparent solid-state media, ranging from wide-bandgap dielectrics to semiconductor materials and in various parts of the optical spectrum, from the ultraviolet to the mid-infrared spectral range. A particular emphasis is given to the most recent experimental developments: multioctave supercontinuum generation with pumping in the mid-infrared spectral range, spectral control, power and energy scaling of broadband radiation and the development of simple, flexible and robust pulse compression techniques, which deliver few optical cycle pulses and which could be readily implemented in a variety of modern ultrafast laser systems.

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Section: ]mentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

Self Cite

167

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“…In order to illustrate our setup's viability for the application in such systems we have generated white light in a bulk medium which is the basis of many of the OPA schemes. YAG crystals have been shown to be suitable bulk media for white light generation using infrared sources [36][37][38][39][40]. We have used a 3 mm YAG window for this purpose.…”

Section: White Light Generationmentioning

confidence: 99%

Millijoule femtosecond pulses at 1937 nm from a diode-pumped ring cavity Tm:YAP regenerative amplifier

et al. 2018

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We present an infrared source operating at 1937 nm center wavelength capable of generating 1.35 mJ pulse energies with 1 kHz repetition rate and 2 GW peak power based on a diode-pumped Tm:YAP regenerative amplifier. The obtained pulses after 45 round trips have been compressed down to 360 fs. Using only a small portion (15 µJ) of the output of the system we managed to generate a white light continuum in a 3 mm YAG window that exhibits the viability of the system as a suitable candidate for a pumping source of a mid-infrared optical parametric amplifier.

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“…However, the nonlinear materials that produce the largest spectral blue shifts, LiF and CaF 2 , exhibit several drawbacks that are unattractive for practical applications. More specifically, LiF is prone to rapid formation of colour centres, which modify the SC spectrum to a certain degree [19,20]. On the other hand, optical damage in CaF 2 due to heat accumulation develops very quickly even at relatively low (1 kHz) pulse repetition rate, so the crystal should be continuously translated [21].…”

Section: Introductionmentioning

confidence: 99%

LiSAF: an efficient and durable nonlinear material for supercontinuum generation in the ultraviolet

Šuminienė¹,

Jukna²,

Šuminas³

et al. 2020

Lith. J. Phys.

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We have experimentally studied supercontinuum generation in an undoped LiSAF crystal using ultraviolet, visible and near infrared pump pulses provided by fundamental and second harmonics of ampliﬁed femtosecond Ti:sapphire and Yb:KGW lasers. We have found that the optical degradation of the crystal, manifested by gradual narrowing of the supercontinuum spectrum, starts much faster using infrared pump pulses. This is attributed to the role of impact ionization, which increases with increasing the pump wavelength. The most reliable operation is achieved with the shortest pump wavelength of 400 nm (the second harmonic of a Ti:sapphire laser), where LiSAF produces a stable, almost 1.3 octave-spanning supercontinuum spectrum with a short-wavelength cut-oﬀ at 252 nm and shows no apparent optical degradation for one hour of continuous operation at 500 Hz repetition rate without crystal translation.

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Comparative study of multioctave supercontinuum generation in fused silica, YAG, and LiF in the range of anomalous group velocity dispersion

Cited by 46 publications

References 46 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Millijoule femtosecond pulses at 1937 nm from a diode-pumped ring cavity Tm:YAP regenerative amplifier

LiSAF: an efficient and durable nonlinear material for supercontinuum generation in the ultraviolet

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