Optimization of Bragg soliton dynamics for enhanced supercontinuum generation in ultra-silicon-rich-nitride devices [Invited]

Cao, Yu; Sohn, Byoung-Uk; Choi, Ju Won; Şahin, E.; Chen, George Feng Rong; Ong, Kenny Yong Keng; Ting, Doris Keh; Eggleton, Benjamin J.; Tan, Dawn T. H.

doi:10.1364/ome.475309

Cited by 6 publications

(1 citation statement)

References 47 publications

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“…Recently it has been reported that the USRN-waveguide is a promising platform to efficiently compress optical pulses and generating SC with significantly low optical power. 5,6 The similar optical pulse compression effect plays a critical role in MI dynamics that is central in long pulse SC generation.…”

Section: Theoretical Modelmentioning

confidence: 99%

On-chip modulation instability

Chowdury,

Aadhi,

Choi

et al. 2023

Optics and Photonics for Information Processing XVII

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We, theoretically study the emergence of Akhmediev Breather (AB) that develops via modulation instability in an Ultra-Silicon-Rich Nitride (USRN) waveguide. The nonlinear parameter of the USRN waveguide is 10 6 times as large as that in single mode fiber with exceptionally strong dispersion induced by the stopband in a cladding modulated Bragg grating (CMBG). This significantly reduces the length scale and input power required for light-matter interaction to take place. We show that at small input powers, the waveguide can trigger strong modulation instability close to the waveguide input. This allows a fully developed AB to form within the first 1-3 mm of a 6 mm waveguide. Realizing MI and AB on an integrated chip offers the opportunity to study a variety of nonlinear phenomena such as supercontinuum generation, Fermi-Pasta-Ulam (FPU) recurrence, and optical rogue waves in highly compact, CMOS-compatible form factors.

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Section: Theoretical Modelmentioning

confidence: 99%

On-chip modulation instability

Chowdury,

Aadhi,

Choi

et al. 2023

Optics and Photonics for Information Processing XVII

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Bragg Solitons – Historical and Future Perspectives

Tan,

Eggleton

2023

Laser & Photonics Reviews

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Solitons have been a subject of intense intellectual curiosity and an avenue for a plethora of applications since they are first observed in water waves. Optical solitons, in particular, have seen tremendous progress, starting from their first theoretical predictions in optical fiber in 1973. On the 50th anniversary of this seminal work from Haseagawa and Tappert, a review is provided on the progress in an important class of optical solitons, the Bragg soliton. Bragg solitons are optical solitons which exist in structures periodic in one dimension. The history of Bragg solitons is described, including the most salient advancements made both in theory and experiments. Recent progress made in integrated photonic devices and their associated design advantages are highlighted, with particular emphasis on how these have facilitated the realization of Bragg soliton dynamics on a chip and their optical processing functions. A discussion and future outlook for this burgeoning field provides a perspective on how Bragg solitons may impact the field of photonics and future applications.

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Resonant Akhmediev breathers

Chowdury,

Tan

2024

Sci Rep

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Modulation instability is a phenomenon in which a minor disturbance within a carrier wave gradually amplifies over time, leading to the formation of a series of compressed waves with higher amplitudes. In terms of frequency analysis, this process results in the generation of new frequencies on both sides of the original carrier wave frequency. We study the impact of fourth-order dispersion on this modulation instability in the context of nonlinear optics that lead to the formation of a series of pulses in the form of Akhmediev breather. The Akhmediev breather, a solution to the nonlinear Schrödinger equation, precisely elucidates how modulation instability produces a sequence of periodic pulses. We observe that when weak fourth-order dispersion is present, significant resonant radiation occurs, characterized by two modulation frequencies originating from different spectral bands. As an Akhmediev breather evolves, these modulation frequencies interact, resulting in a resonant amplification of spectral sidebands on either side of the breather. When fourth-order dispersion is of intermediate strength, the spectral bandwidth of the Akhmediev breather diminishes due to less pronounced resonant interactions, while stronger dispersion causes the merging of the two modulation frequency bands into a single band. Throughout these interactions, we witness a complex energy exchange process among the phase-matched frequency components. Moreover, we provide a precise explanation for the disappearance of the Akhmediev breather under weak fourth-order dispersion and its resurgence with stronger values. Our study demonstrates that Akhmediev breathers, under the influence of fourth-order dispersion, possess the capability to generate infinitely many intricate yet coherent patterns in the temporal domain.

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Optimization of Bragg soliton dynamics for enhanced supercontinuum generation in ultra-silicon-rich-nitride devices [Invited]

Cited by 6 publications

References 47 publications

On-chip modulation instability

On-chip modulation instability

Bragg Solitons – Historical and Future Perspectives

Resonant Akhmediev breathers

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