Phase-locking and Pulse Generation in Multi-Frequency Brillouin Oscillator via Four Wave Mixing

Büttner, Thiess; Kabakova, Irina V.; Hudson, Darren D.; Pant, Ravi; Poulton, Christopher G.; Judge, Alexander C.; Eggleton, Benjamin J.

doi:10.1038/srep05032

Cited by 43 publications

(44 citation statements)

References 51 publications

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“…The zoomed-in inset taken at around 30 ns shows that the initial rapid oscillations are sinusoidal with a frequency of Ω B /2π GHz, the Brillouin frequency shift. They are due to the beating between the pump and the newly-generated first Stokes wave [10,17]. Later in the evolution of the output pulse, the interference pattern becomes more complicated as higher order Stokes waves are generated.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…In order to further test our theory, we consider the experiment of Büttner et al in which phase-locking and pulse generation through cascaded SBS and four-wave mixing were observed in a chalcogenide fiber Fabry-Perot cavity [10]. In this case the boundary conditions are…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Anti-Stokes orders can also be generated through four-wave mixing once there are at least two co-propagating pump and Stokes waves [7]. The result is a large number of equally-spaced lines that are coherently phased: a Brillouin frequency comb [8][9][10][11][12][13]. These frequency combs have attracted a great deal of interest because of their potential applications in areas such as microwave photonics, sensing, spectroscopy, and wavelength-division multiplexing [14].…”

Section: Introductionmentioning

confidence: 99%

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Unified approach to cascaded stimulated Brillouin scattering and frequency-comb generation

Dong

Winful

2016

Phys. Rev. A

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We present a novel approach to cascaded stimulated Brillouin scattering and frequency comb generation in which the multitude of interacting pump, Stokes, and anti-Stokes optical fields are described by a single forward wave and a single backward wave at a single carrier frequency. The envelopes of these two waves are modulated through coupling to a single acoustic oscillation and through four-wave mixing. Starting from a single pump field, we observe the emergence of a comb of frequencies as the intensity is increased. The set of three differential equations derived here are sufficient to describe the generation of any number of Brillouin sidebands in oscillator systems that would have required hundreds of coupled equations in the standard approach. We test the new approach on some published experiments and find excellent agreement with the results. *

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unified approach to cascaded stimulated Brillouin scattering and frequency-comb generation

Dong

Winful

2016

Phys. Rev. A

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“…Although SBS has been widely studied in optical fibers, recently there has been a growing interest in harnessing SBS in nanophotonic waveguides [22][23][24][25][26][27]. The ability to control the coherent interaction of photons and acoustic phonons in chip-sized devices (as opposed to in optical fibers many kilometres long) promises not only fascinating new physical insights, but also opens the path to realising key technologies on-chip including slow light [28,29]; narrow linewidth lasers [30]; optical frequency combs [31,32]; RF signal processing [33][34][35] and filtering [36][37][38][39][40]. In particular, SBS filters can exhibit linewidths of the order of 10-100 MHz.…”

mentioning

confidence: 99%

Low-power, chip-based stimulated Brillouin scattering microwave photonic filter with ultrahigh selectivity

Marpaung

Morrison

Pagani

et al. 2015

Optica

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338

213

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Highly selective and reconfigurable microwave filters are of great importance in radiofrequency signal processing. Microwave photonic (MWP) filters are of particular interest, as they offer flexible reconfiguration and an order of magnitude higher frequency tuning range than electronic filters. However, all MWP filters to date have been limited by trade-offs between key parameters such as tuning range, resolution, and suppression. This problem is exacerbated in the case of integrated MWP filters, blocking the path to compact, high performance filters. Here we show the first chip-based MWP band-stop filter with ultra-high suppression, high resolution in the MHz range, and 0-30 GHz frequency tuning. This record performance was achieved using an ultra-low Brillouin gain from a compact photonic chip and a novel approach of optical resonance-assisted RF signal cancellation. The results point to new ways of creating energy-efficient and reconfigurable integrated MWP signal processors for wireless communications and defence applications.The explosive growth in mobile communications demands radio-frequency (RF) technologies with exceptional spectral efficiency such as cognitive radios, which can adapt their frequencies to exploit the available spectrum in real-time [1,2]. Such frequency-agile systems will benefit hugely from RF filters that can be tuned over many gigahertz whilst keeping high MHz-scale resolution and high selectivity to prevent severe interference due to spectrumsharing. While this is difficult to achieve with all-electronic filters [3][4][5][6][7], integrated microwave photonic (IMWP) filters [8] can readily achieve multi-gigahertz tuning range without significant degradation in their frequency response. However, these filters typically exhibit limited resolution (GHz instead of MHz linewidths) and are plagued by trade-offs between key parameters, such as between the frequency tuning range and the resolution for multi-tap filters [9][10][11][12][13]; or between the peak rejection and the resolution for resonator-based filters [14][15][16][17][18].Stimulated Brillouin scattering (SBS) [19][20][21][22] offers a route to MHz-resolution IMWP filters. Although SBS has been widely studied in optical fibers, recently there has been a growing interest in harnessing SBS in nanophotonic waveguides [22][23][24][25][26][27]. The ability to control the coherent interaction of photons and acoustic phonons in chip-sized devices (as opposed to in optical fibers many kilometres long) promises not only fascinating new physical insights, but also opens the path to realising key technologies on-chip including slow light [28,29]; narrow linewidth lasers [30]; optical frequency combs [31,32]; RF signal processing [33][34][35] and filtering [36][37][38][39][40]. In particular, SBS filters can exhibit linewidths of the order of 10-100 MHz. Such a high resolution is unmatched by most on-chip devices because it requires extremely low material losses and impractically-large devices [41].Although IMWP filters exploiting SBS on ch...

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“…It is usually related to the effect of electrostriction and gives rise to inelastic light backscattering with a Doppler downshift related to the acoustic phonon frequency. Over the past years, SBS has been extensively studied in numerous optical waveguides such as optical fibers 1-3 , photonics crystal fibers 4,5 , and on-chip photonic integrated circuits [6][7][8] . A variety of nonlinear materials including silica, chalcogenide or silicon have been investigated.…”

mentioning

confidence: 99%

Cascaded Brillouin lasing in monolithic barium fluoride whispering gallery mode resonators

Lin

Diallo

Saleh

et al. 2014

Applied Physics Letters

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We report the observation of stimulated Brillouin scattering and lasing at 1550 nm in barium fluoride (BaF 2 ) crystal. Brillouin lasing was achieved with ultra-high quality (Q) factor monolithic whispering gallery mode (WGM) mm-size disk resonators. Overmoded resonators were specifically used to provide cavity resonances for both the pump and all Brillouin Stokes waves. Single and multiple Brillouin Stokes radiations with frequency shift ranging from 8.2 GHz up to 49 GHz have been generated through cascaded Brillouin lasing. BaF 2 resonator-based Brillouin lasing can find potential applications for high-coherence lasers and microwave photonics.Stimulated Brillouin scattering (SBS) is a nonlinear optical process resulting from the coherent interaction of light and acoustic waves. It is usually related to the effect of electrostriction and gives rise to inelastic light backscattering with a Doppler downshift related to the acoustic phonon frequency. Over the past years, SBS has been extensively studied in numerous optical waveguides such as optical fibers 1-3 , photonics crystal fibers 4,5 , and on-chip photonic integrated circuits [6][7][8] . A variety of nonlinear materials including silica, chalcogenide or silicon have been investigated. Enhanced SBS has been recently predicted and demonstrated in nanoscale silicon photonic waveguides 9,10 , where the radiation pressure combines with electrostriction to greatly improve the Brillouin gain, thus bridging the gap between SBS and optomechanics. Enhanced and cascaded SBS can also be easily achieved in nonlinear optical cavities, leading to narrow-linewidth and efficient SBS lasing 11,12 . Among optical resonators, whispering gallery mode (WGM) resonators have a number of qualities that make them very attractive for investigating SBS. Their advantages include a strong light confinement due to small mode volumes and ultra-high Q factors 13 . Moreover, crystalline WGM resonators are very interesting because of their broad transparency window ranging from the ultraviolet to the mid-infrared region [14][15][16] . These photonic platforms thus appear as alternative and promising solutions for nonlinear applications, and thus opens an approach to harness and enhance the interaction between photons and acoustic phonons. For instance, Brillouin lasing with microwatt threshold power has recently been observed in ultra-high Q-factor CaF 2 WGM resonators 17 . A narrow-linewidth Brillouin microcavity laser and an ultra-low-phase-noise microwave synthetizer have also been demonstrated using chemically etched ultrahigh-Q silica-on-silicon wedge resonators 18,19 . Brillouin scattering from surface acoustic waves has also been reported in MgF 2 WGM resonators and in silica microspheres [20][21][22] .

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Phase-locking and Pulse Generation in Multi-Frequency Brillouin Oscillator via Four Wave Mixing

Cited by 43 publications

References 51 publications

Unified approach to cascaded stimulated Brillouin scattering and frequency-comb generation

Unified approach to cascaded stimulated Brillouin scattering and frequency-comb generation

Low-power, chip-based stimulated Brillouin scattering microwave photonic filter with ultrahigh selectivity

Cascaded Brillouin lasing in monolithic barium fluoride whispering gallery mode resonators

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