Dynamics of optomechanical spatial solitons in dual-nanoweb structures

Conti, Claudio; Butsch, A.; Biancalana, Fabio; Russell, P. St. J.

doi:10.1103/physreva.86.013830

Cited by 8 publications

(12 citation statements)

References 23 publications

(38 reference statements)

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“…The optomechanical nonlinearity originates from the interdependence of optical gradient forces and deflection-dependent changes in n m , and strongly dominates over the contributions of photoelasticity and electrostriction, which we therefore neglect. P NL can therefore be expressed to first order as [18] P NL ε 0 ∂ε ∂δ δE 2ε 0 n m ∂n m ∂δ δE:…”

Section: Mechanism and Theorymentioning

confidence: 99%

“…The driving term is given by the optical gradient pressure p opt , which can be calculated using the Maxwell stress tensor [11]. To simplify the analysis, we neglect magnetic field components (they contribute only ∼6% to the interweb force) and approximate p opt acting on one web by evaluating the difference between the squared electric fields at its upper and lower surfaces [18]. Further, in Eq.…”

Section: Mechanism and Theorymentioning

confidence: 99%

“…The constants in Eq. (6) is the optomechanical overlap integral and h p is a characteristic length given by [18] h p jf y upper j 2 − jf y lower j 2 −1 ;…”

Section: Appendix Amentioning

confidence: 99%

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CW-pumped single-pass frequency comb generation by resonant optomechanical nonlinearity in dual-nanoweb fiber

Butsch¹,

Koehler²,

Noskov³

et al. 2014

Optica

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Recent experiments in the field of strong optomechanical interactions have focused on either structures that are simultaneously optically and mechanically resonant, or photonic crystal fibers pumped by a laser intensity modulated at a mechanical resonant frequency of the glass core. Here, we report continuous-wave (CW) pumped self-oscillations of a fiber nanostructure that is only mechanically resonant. Since the mechanism has close similarities to stimulated Raman scattering by molecules, it has been named stimulated Raman-like scattering. The structure consists of two submicrometer thick glass membranes (nanowebs), spaced by a few hundred nanometers and supported inside a 12-cm-long capillary fiber. It is driven into oscillation by a CW pump laser at powers as low as a few milliwatts. As the pump power is increased above threshold, a comb of Stokes and anti-Stokes lines is generated, spaced by the oscillator frequency of similar to 6 MHz. An unprecedentedly high Raman-like gain of similar to 4 x 10(6) m(-1) W-1 is inferred after analysis of the experimental data. Resonant frequencies as high as a few hundred megahertz are possible through the use of thicker and less-wide webs, suggesting that the structure can find application in passive mode-locking of fiber lasers, optical frequency metrology, and spectroscopy. (C) 2014 Optical Society of Americ

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Section: Mechanism and Theorymentioning

confidence: 99%

Section: Mechanism and Theorymentioning

confidence: 99%

See 1 more Smart Citation

CW-pumped single-pass frequency comb generation by resonant optomechanical nonlinearity in dual-nanoweb fiber

Butsch¹,

Koehler²,

Noskov³

et al. 2014

Optica

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“…1, which is two parallel, suspended waveguides separated by a distance d with a free-standing section of length L. Each waveguide has a cross section of dimensions w × h. In real devices, both ends of the waveguides have to rest on a substrate which is the most common configuration in planar waveguides. Otherwise, both sides of the waveguides can be attached to a wall [13], which is only shown inside a capillary fiber with a suspended dual-nanoweb structure. Here we consider the case of two silicon nitride waveguides with fixing two ends, and assume the width and height of the waveguide are 700 nm and 400 nm.…”

Section: Optical Forces and Deformationmentioning

confidence: 99%

Influence of optical forces on nonlinear optical frequency conversion in nanoscale waveguide devices

Luo

Tang

et al. 2016

Opt. Express

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We theoretically investigate the influence of optical gradient forces on nonlinear frequency conversion in a typical nanoscale optomechanical system, which consists of two parallel, suspended waveguides. The waveguides deform with the input power and the phase-matching wavelength changes along the waveguides. Utilizing the spread of deformations collectively allows phase matching over a wider range of pump wavelengths. The third harmonic phase-matching wavelength shift can be as large as 3.6 nm/mW when the waveguide length is 100 μm and the initial gap is 150 nm. It is analogous to chirping the poling period of quasi-phase-matched devices to extend their bandwidths, and allows broad third harmonic to be generated for uses such as biological spectroscopy. Finally, we discuss the conversion efficiency and the optimal phase-matching wavelength with a single-frequency pump.

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“…The stability of these self-channelled modes is a consequence of the nonlocality of the mechanical response. Investigations of the stability and propagation dynamics of the self-channelled modes show that they represent a novel class of nonlocal spatial solitons, that can potentially propagate over fibre lengths of many meters [6]. The extreme optomechanical nonlinearity in dual-web fibre is obtained without need for an optical cavity, and is intrinsically broadband.…”

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confidence: 98%

Optomechanical and optoacoustic phenomena in microstructured silica fibres

2013

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Recent results on optomechanical and optoacoustic nonlinearities in optical fibres are reported. In a new type of a microstructured silica fibre, comprising two ultra-thin closely spaced glass waveguides, an extremely high and optically broadband optomechanical nonlinearity is shown to occur. This nonlinearity originates from the optical gradient forces between coupled waveguides, can exceed the Kerr effect by many orders of magnitude and allows the formation of stable self-trapped optical modes that represent a novel kind of optical soliton. Furthermore, optoacoustic interaction via electrostriction in the micron-sized core of a photonic crystal fibre is studied. It is demonstrated, that coherent optically-driven acoustic waves, tightly guided in the core, can facilitate in-fibre dynamic optical isolation and all-optical switching

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Dynamics of optomechanical spatial solitons in dual-nanoweb structures

Abstract: We theoretically investigate the stability and dynamics of self-channeled beams that form via nonlocal optomechanical interactions in dual-nanoweb microstructured fibers. These beams represent a class of spatial soliton

Cited by 8 publications

References 23 publications

CW-pumped single-pass frequency comb generation by resonant optomechanical nonlinearity in dual-nanoweb fiber

CW-pumped single-pass frequency comb generation by resonant optomechanical nonlinearity in dual-nanoweb fiber

Influence of optical forces on nonlinear optical frequency conversion in nanoscale waveguide devices

Optomechanical and optoacoustic phenomena in microstructured silica fibres

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