Self-similar picosecond pulse compression for supercontinuum generation at mid-infrared wavelength in silicon strip waveguides

Cheng, Ya; Yuan, Jinhui; Mei, Chao; Li, Feng; Kang, Zhe; Yan, Binbin; Zhou, Xian; Wu, Qiang; Wang, Kuiru; Sang, Xinzhu; Long, Keping; Yu, Chongxiu; Farrell, Gerald

doi:10.1016/j.optcom.2019.124380

Cited by 14 publications

(8 citation statements)

References 49 publications

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“…With this technique higher compression factors can be achieved, at the expenses of a pedestal in the temporal profile of the pulse, due to the uncompensated nonlinear frequency chirp. Finally, self-similar compression has been investigated theoretically and experimentally in optical fibers [ 188 – 191 ]. In this case, temporal compression can be achieved employing varying nonlinearity and/or dispersion profiles along the propagation direction of the pulse.…”

Section: Applications Of Chip-based Supercontinuummentioning

confidence: 99%

“…An interesting advantage of nanophotonic waveguides is that they can be precisely varied or structured along the direction of the pulse propagation. For instance, waveguide tapers have been proposed for self-similar pulse compression [ 190 , 191 ]. Also, waveguide-based Bragg gratings and photonic crystals can dramatically increase the nonlinear interaction via slow-light phenomena, and offer an enhanced dispersion variation close to the photonic band-edge.…”

Section: Applications Of Chip-based Supercontinuummentioning

confidence: 99%

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Supercontinuum in integrated photonics: generation, applications, challenges, and perspectives

et al. 2023

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Frequency conversion in nonlinear materials is an extremely useful solution to the generation of new optical frequencies. Often, it is the only viable solution to realize light sources highly relevant for applications in science and industry. In particular, supercontinuum generation in waveguides, defined as the extreme spectral broadening of an input pulsed laser light, is a powerful technique to bridge distant spectral regions based on single-pass geometry, without requiring additional seed lasers or temporal synchronization. Owing to the influence of dispersion on the nonlinear broadening physics, supercontinuum generation had its breakthrough with the advent of photonic crystal fibers, which permitted an advanced control of light confinement, thereby greatly improving our understanding of the underlying phenomena responsible for supercontinuum generation. More recently, maturing in fabrication of photonic integrated waveguides has resulted in access to supercontinuum generation platforms benefiting from precise lithographic control of dispersion, high yield, compact footprint, and improved power consumption. This Review aims to present a comprehensive overview of supercontinuum generation in chip-based platforms, from underlying physics mechanisms up to the most recent and significant demonstrations. The diversity of integrated material platforms, as well as specific features of waveguides, is opening new opportunities, as will be discussed here.

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Section: Applications Of Chip-based Supercontinuummentioning

confidence: 99%

Section: Applications Of Chip-based Supercontinuummentioning

confidence: 99%

Supercontinuum in integrated photonics: generation, applications, challenges, and perspectives

et al. 2023

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“…Nevertheless, the operation region is limited in the MIR bands. To further improve the compression factor of self-similar PC at the MIR bands, Cheng et al numerically designed a suspended inversely tapered Si strip waveguide for high-degree self-similar PC [168]. The specially designed suspended structure aims at reducing the material loss of silica substrate at the MIR band.…”

Section: Pulse Compressionmentioning

confidence: 99%

ADVANCED PROGRESS ON Χ<SUP>(3)</SUP> NONLINEARITY IN CHIP-SCALE PHOTONIC PLATFORMS (INVITED REVIEW)

Kang

Mei

Zhang

et al. 2021

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χ (3) nonlinearity enables ultrafast femtosecond scale light-to-light coupling and manipulation of intensity, phase, and frequency. χ (3) nonlinear functionality in micro-and nanoscale photonic waveguides can potentially replace bulky fiber platforms for many applications. In this Review, we summarize and comment on the progress on χ (3) nonlinearity in chip-scale photonic platforms, including several focused hot topics such as broadband and coherent sources in the new bands, nonlinear pulse shaping, and all-optical signal processing. An outlook of challenges and prospects on this hot research field is given at the end.

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“…Therefore, the input pulse characteristic with random noise can be expressed by Equation ( 9). [61] A(t) = √ P 0 sech…”

Section: The Proposed Structure and Principlesmentioning

confidence: 99%

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

et al. 2021

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Slot waveguides comprised of Ge 23 Sb 7 S 70 and Si with and without graphene are considered for super-continuum generation in the mid-infrared range. The dispersion characteristics are optimized for the proposed waveguides comprised of Si and Ge 23 Sb 7 S 70 chalcogenide as the core and cladding, respectively with and without graphene sheets embedded in the proposed structure. The proposed waveguide without graphene possesses all-normal dispersion and the super-continuum spectra with bandwidth of 1.75 µm is obtained for a pump with wavelength of 2 µm, peak power of 100 W, and time duration of 50 fs, at 20 dB level. Also, the total length of the waveguide is 8 mm. The optimized structure with three graphene sheets presents flat anomalous dispersion and the super-continuum spectra with bandwidth of 3 µm is obtained for a pump with wavelength, peak power, and time duration of 3 µm, 7 mW, and 50 fs, respectively at 10 dB level. It is demonstrated that the proper dispersion region for super-continuum generation depends on the sign of Kerr-index of the nonlinear material. The proposed waveguides are highly compatible with fabrication technologies for mid infrared applications. IntroductionRecently, super-continuum generation (SCG) has attracted a great deal of interest in the design of broadband optical sources. [1] SCG originates from the interaction between diverse nonlinear and linear effects. The nonlinear effects include self-phase modulation (SPM), [2] cross-phase modulation, [3] soliton formation, [4] soliton fission (SF), stimulated Raman scattering, [5] four-wave mixing (FWM), [6,7] and the main linear characteristics are the dispersion and loss. SCG is applicable in optical coherence tomography, spectroscopy, high-precision frequency metrology, and pulse

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Self-similar picosecond pulse compression for supercontinuum generation at mid-infrared wavelength in silicon strip waveguides

Abstract: and Farrell, Gerald (2020) Self-similar picosecond pulse compression for supercontinuum generation at mid-infrared wavelength in silicon strip waveguides. Optics Communications, 454. p. 124380.

Cited by 14 publications

References 49 publications

Supercontinuum in integrated photonics: generation, applications, challenges, and perspectives

Supercontinuum in integrated photonics: generation, applications, challenges, and perspectives

ADVANCED PROGRESS ON Χ<SUP>(3)</SUP> NONLINEARITY IN CHIP-SCALE PHOTONIC PLATFORMS (INVITED REVIEW)

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

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