Nonlinear Optical Properties of Glass

Dussauze, Marc; Cardinal, Thierry

doi:10.1007/978-3-319-93728-1_6

Cited by 19 publications

(22 citation statements)

References 169 publications

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“…The spectrum generated by the self-similar amplification regime also has a parabolic form (Figure 4b) with a bandwidth of 16 nm. The small ripples seen in the middle of the spectrum are the result of the limited bandwidth by the finite spectral bandwidth of Raman gain (about 23 nm according to [17]). At the same time, Figure 4e-h show the self-similar regime and similariton formation for 130 m of pulse propagation inside the STEP-F, although the mechanism of the propagations is different.…”

Section: Numerical Setup and Resultsmentioning

confidence: 99%

Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification

Graini

Ortaç

2021

Photonics

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This paper aims to pave the way towards the demonstration of spatiotemporal similariton pulses’ evolution in passive multimode fibers with Raman amplification. We numerically present this issue in graded-index and step-index multimode fibers and provide a first look at the complex spatiotemporal dynamics of similariton pulses. The results showed that the similariton pulses could be generated in both multimode fibers. The temporal and spectral evolution of the pulses can be characterized as parabolic shapes with linear chirp and kW peak power. By compressing these, high-energy femtoseconds pulses can be obtained, starting initial picosecond pulses. A spatial beam profile could be preserved in both multimode fibers with the most energy coupled to the fundamental mode. Specifically, the similariton pulses’ generation with Raman amplification in a graded-index multimode fiber improves the spatial beam self-cleaning process under the different initial modes’ excitation. The observation of a new beam self-cleaning process is another attractor feature of propagation in graded-index multimode fibers.

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Section: Numerical Setup and Resultsmentioning

confidence: 99%

Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification

Graini

Ortaç

2021

Photonics

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“…For example, the n 2 value obtained for pure As 2 S 3 was about 2.9 x 10 À18 m 2 /W while for fused SiO 2 was about 2.8 x 10 À19 m 2 /W [25], which is comparatively about 10 times lower. So, materials with lower band gap seam to exhibit an increase in the nonlinear optical behavior; SiO 2 has a gap of about 9 eV while that of As 2 S 3 is 2.3 eV [19].…”

Section: Figurementioning

confidence: 99%

Optical Nonlinearities in Glasses

Vasconcelos¹

2022

Nonlinear Optics - Nonlinear Nanophotonics and Novel Materials for Nonlinear Optics

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The field of photonics has been the target of constant innovations based on a deep knowledge of the nonlinear optical (NLO) properties of materials and especially on information/data technologies. This chapter compiles some of the main physical aspects needed to understand NLO responses, especially in glasses. Any deviation from the linear correlation between a material’s polarization response and the electric component of an applied electromagnetic field is an example of nonlinear optic behavior. Heavy metal oxide and chalcogenide glasses offer the largest nonlinear response. For example, high refractive index and high dispersion glasses fall in the type of non-resonant devices, while the resonant ones comprise metal nanoparticle doped glasses. Metal nanoparticles’ doped glasses can be pre- pared by the sol-gel method. The optical absorption spectrum of Ag-doped silica glass shows the presence of an absorption band of surface Plasmon Resonance due to Ag nanoparticles at 420 nm and Z-scan has been used to study the NLO properties. This chapter contains a brief discussion of the basic principles of nonlinear optics, the review of the nonlinear optical of glass in general, and two separate sections concerning the nonlinear optical effects in the glasses doped with quantum dots and metals, respectively.

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“…When the electric field of a laser E(t) is applied to some medium, the existing dipoles are aligned along the direction of the incoming field or new electric dipoles are induced. The resulting effect is termed polarization P (t) [81,97] and can be expressed by a linear P (1) (t) and nonlinear term P N L (t) in a Taylor-series expansion:…”

Section: Kerr-lens Mode-lockingmentioning

confidence: 99%

“…where χ n is referred to as the nonlinear optical susceptibility 1 of order n and 0 is the vacuum permittivity. For the power levels considered in this thesis, we only consider χ (2) -and χ (3) -related processes, and an overview of some related optical phenomena is given in table 2.1 [81,[97][98][99].…”

Section: Kerr-lens Mode-lockingmentioning

confidence: 99%

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Nagl¹

2021

Springer Theses

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The mid-infrared (MIR) spectral range with wavelengths between 2 µm and 20 µm holds tremendous potential for the study of complex biological systems, given the abundance of intense and unique molecular absorption lines that can be detected. Consequently, spectroscopic applications of mid-infrared radiation have garnered enormous attention in recent years. A particularly striking example is the combination of multi-MHz-repetition-rate, few-cycle MIR light sources with electric-field-resolved techniques, enabling the recording of amplitude-and phase-resolved molecular signals with unparalleled specificity and shot noise limited sensitivity. Despite the ever-growing research demand, their widespread use is severely hampered by the lack of low-noise, compact, and ultrafast laser systems.In this dissertation, a new generation of table-top mid-infrared laser sources is presented, bringing cutting-edge laser diode technology and few-cycle Cr 2+ :ZnS/ZnSe solid-state oscillators together for the first time. Not only have these laser systems proven to reliably provide coherent radiation in the 2 µm to 3 µm region, the simultaneous reduction in size and complexity, accompanied by an improved overall efficiency and -most importantly -noise performance, renders this approach as pioneering for future MIR applications.In total, three laser systems are developed, each of them pushing the frontiers of directly diode-pumped laser technology. The first one is driven by a single-emitter indium phosphide laser diode and delivers more than 500 mW of output power combined with pulse durations as short as 45 fs. With this first ever directly diodepumped Kerr-lens mode-locked (KLM) Cr 2+ :ZnS/ZnSe oscillator, experimental results confirm a highly stable operation. In addition, amplitude noise measurements reveal an excellent low-noise performance of the mode-locked laser output.Driven by the desire to match and exceed the performance of more mature fiber-laser-pumped counterparts and also to boost the efficiency of the envisaged downstream applications, the output of two single-emitter pump laser diodes is carefully combined and implemented into a second-generation design. The achieved peak powers are almost three-times higher compared to before, while the low-noise performance of the KLM output is maintained.xii Typically, the design architecture of laser systems used for generating mid-infrared radiation up to several tens of microns includes a sophisticated chain of amplification, pulse compression and parametric conversion stages. Using a powerful few-cycle mid-infrared oscillator as driving laser source instead not only significantly improves the effectiveness of these nonlinear schemes, but could even supersede the need for initial amplification. The presented third-generation system brings the directly diode-pumped Cr 2+ :ZnS/ZnSe solid-state laser technology to a new level; with output peak powers reaching 1 MW and pulse durations as short as 28 fs, direct generation of CEP-stable mid-infrared pulses in a nonlinear optical cryst...

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Nonlinear Optical Properties of Glass

Cited by 19 publications

References 169 publications

Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification

Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification

Optical Nonlinearities in Glasses

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

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