Influences of multiphoton absorption and free-carrier effects on frequency-comb generation in normal dispersion silicon microresonators

Liu, Mulong; Wang, Leiran; Sun, Qibing; Li, Siqi; Lu, Zhizhou; Wang, Weiqiang; Zhang, Wenfu; Hu, Xiaohong; Zhao, Wei

doi:10.1364/prj.6.000238

Cited by 23 publications

(12 citation statements)

References 44 publications

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“…During the simulation, τR is 2.7fs [31] and other material-related parameters are calculated from a finite element solver and are listed in the caption. Taking the RSFS and wavelength-dependent loss into Fourier terms [31] and applying fourth-order Runge-Kutta method [33], the simulated spectrum (red envelope) in Fig. 4(d) is in good agreement with the experiment results where the inset shows the simulated soliton pulse profile exhibiting 114 fs of full width at half maximum (FWHM).…”

supporting

confidence: 66%

Deterministic generation and switching of dissipative Kerr soliton in a thermally controlled micro-resonator

Wang

Zhang

et al. 2019

AIP Advances

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Dissipative Kerr solitons (DKSs) in the high-Q microresonator correspond to self-organized short pulse in time domain via double balance between dispersion and Kerr nonlinearity, as well as cavity loss and parametric gain. In this paper, we first experimentally demonstrate deterministic generation and switching of DKSs in a thermally controlled micro-ring resonator based on highindex doped silica glass platform. In our scheme, an auxiliary laser is introduced to timely balance the intracavity heat fluctuation. By decreasing the operating temperature through a thermo-electric cooler, primary-, chaotic-comb and soliton crystal are firstly generated, then increasing the temperature, DKSs switching and single soliton are robustly accessed, which is independent of the tuning speed. During the switching process, varieties of DKSs are identified by tens of the featured discrete "soliton-steps", which is favorable for study of onchip soliton interactions and nonlinear applications.

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confidence: 66%

Deterministic generation and switching of dissipative Kerr soliton in a thermally controlled micro-resonator

Wang

Zhang

et al. 2019

AIP Advances

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“…Although this comb power is lower than the previously reported dark soliton microcombs [23], it is higher than the power of a bright soliton microcomb, which is usually smaller than 1 mW [18]. Compared to the mode-interaction facilitated platicon generation [20], the formation of the platicon in our simulation is similar to the dual-pump platicon generation scheme [42]. But the primary comb lines are generated by nondegenerate FWM between the pump and the Raman laser in our scheme and stable platicon generation can be achieved with a proper detuning [42].…”

Section: Stable Platicon and Visible Comb Generation In An Aluminmentioning

confidence: 41%

“…Compared to the mode-interaction facilitated platicon generation [20], the formation of the platicon in our simulation is similar to the dual-pump platicon generation scheme [42]. But the primary comb lines are generated by nondegenerate FWM between the pump and the Raman laser in our scheme and stable platicon generation can be achieved with a proper detuning [42]. It is notable from part IV of Fig.…”

Section: Stable Platicon and Visible Comb Generation In An Aluminmentioning

confidence: 61%

Generation of stable and breathing flat-top solitons via Raman assisted four wave mixing in microresonators

et al. 2020

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Flat-top-soliton (or platicon) dynamics in coherently pumped normal dispersion microresonators is important for both fundamental nonlinear physics and microcomb generation in the visible band. Here we numerically investigate the platicon generation that is initiated via Raman assisted four wave mixing instead of mode interaction. To show the possibility of generating coherent combs in the visible band, we design an aluminum nitride (AlN) microresonator with normal dispersion and investigate the comb generation dynamics in simulations. Stable platicon Kerr combs can be generated in this AlN microresonator using a 780-nm pump. Moreover, we also observe a breather platicon dynamics induced by the narrow Raman gain spectrum of crystalline AlN, which shows distinct dynamics from the dark soliton breathers reported in previous work that are dominated by Kerr effect. A phase diagram bearing the influence of the pump detuning and pump power on the breathing dynamics of the breather platicon is also computed. Furthermore, a transition to chaotic breathing is numerically observed.

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“…Firstly, high intensity of light trapped inside a high-Q resonator can give rise to considerable multiphoton absorption losses. Indeed such losses are a significant obstacle for silicon-based photonic devices operating at telecommunication and mid-infrared wavelengths [85,86]. Secondly, although low-power nonlinear effects are possible mostly with ultra-high-Q microresonators, such devices are sensitive to even minor fabrication imperfections, which compromises their scalability and on-chip integrability.…”

Section: Low-power Nonlinear Photonicsmentioning

confidence: 99%

Coupling light and sound: giant nonlinearities from oscillating bubbles and droplets

Maksymov

Greentree

2019

Nanophotonics

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Nonlinear optical processes are vital for fields including telecommunications, signal processing, data storage, spectroscopy, sensing, and imaging. As an independent research area, nonlinear optics began with the invention of the laser, because practical sources of intense light needed to generate optical nonlinearities were not previously available. However the high power requirements of many nonlinear optical systems limit their use, especially in portable or medical applications, and so there is a push to develop new materials and resonant structures capable of producing nonlinear optical phenomena with low-power light emitted by inexpensive and compact sources. Acoustic nonlinearities, especially giant acoustic nonlinear phenomena in gas bubbles and liquid droplets, are much stronger than their optical counterparts. Here, we suggest employing acoustic nonlinearities to generate new optical frequencies, thereby effectively reproducing nonlinear optical processes without the need for laser light. We critically survey the current literature dedicated to the interaction of light with nonlinear acoustic waves and highly-nonlinear oscillations of gas bubbles and liquid droplets. We show that the conversion of acoustic nonlinearities into optical signals is possible with low-cost incoherent light sources such as lightemitting diodes, which would usher new classes of low-power photonic devices that are more affordable for remote communities and developing nations, or where there are demanding requirements on size, weight and power. . 1: (a) Generation of new optical frequencies via a nonlinear optical interaction. High-power monochromatic laser light interacts with the nonlinear optical medium, e.g. a dielectric microresonator, to generate new optical frequencies [9]. (b, c) The nonlinear properties of sound can be used to generate optical nonlinearities without the need for high-power laser light. Low-power light couples to a sound wave via a deformable fluid, e.g. gas bubble or liquidmetal nanoparticle, exploiting strong nonlinear acoustic effects. This converts acoustic frequencies to the optical domain, effectively reproducing the result of the nonlinear optical interaction in (a). Images from www.freeimages.com and www.dreamstime.com. FIG

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Influences of multiphoton absorption and free-carrier effects on frequency-comb generation in normal dispersion silicon microresonators

Cited by 23 publications

References 44 publications

Deterministic generation and switching of dissipative Kerr soliton in a thermally controlled micro-resonator

Deterministic generation and switching of dissipative Kerr soliton in a thermally controlled micro-resonator

Generation of stable and breathing flat-top solitons via Raman assisted four wave mixing in microresonators

Coupling light and sound: giant nonlinearities from oscillating bubbles and droplets

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