Forward stimulated Brillouin scattering in optical nanofibers

Cao, Min; Li, Haisu; Tang, Min; Mi, Yuean; Huang, Lin

doi:10.1364/josab.36.002079

Cited by 17 publications

(7 citation statements)

References 38 publications

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“…[ 16 ] The linewidth

Γ_{normalm}

of the m th FSBS resonant frequency that was related to the

R_{0, m}

acoustic mode was given by

Γ_{normalm} = Γ_{m, int} + Γ_{mir}

, where

Γ_{m, int}

was an acoustic mode–dependent inherent parameter that was related to the fiber cladding inhomogeneity and acoustic dissipation, and might be assumed as

Γ_{m, int} = Ω_{normalm} / 1000

. [ 17 ] In addition,

Γ_{mir}

was boundary related and independent of the choice of m, which was govern by [ 15,18 ]

\frac{false| Z_{normalf} - Z false|}{Z_{normalf} + Z} = exp [- \frac{1}{2} Γ_{mir} t_{normalr}]

where

Z_{normalf}

is the mechanical impedance of the fiber and Z is the acoustic impedance of the environment, while

t_{normalr}

is the acoustic propagation delay across the fiber diameter. The nonlinear optomechanical coefficient of FSBS gain induced by each acoustic mode could be given by

γ^{false(normalm false)} false(Ω false) = γ_{0}^{false(normalm false)} \frac{1}{1 + {[Ω - Ω_{normalm}]}^{2} / {false[\frac{1}{2} Γ_{normalm} false]}^{2}}

where the maximum value

γ_{0}^{false(normalm false)}

is obtained on the resonant frequency of

…”

Section: Methodsmentioning

confidence: 99%

“…[ 15 ] It could be inferred that the nonlinear coefficient and the linewidth of FSBS would differ as the fiber geometric size changes, since

Q_{ES}^{false(normalm false)}, Q_{PE}^{false(normalm false)}, and Γ_{normalm}

were all radial parameters dependent. For the excitation of multiple acoustic modes, the total FSBS gain can be expressed as [ 17 ]

g false(Ω false) = \sum_{normalm} γ_{0}^{false(normalm false)} \frac{1}{1 + {[Ω - Ω_{normalm}]}^{2} / {false[\frac{1}{2} Γ_{normalm} false]}^{2}}

…”

Section: Methodsmentioning

confidence: 99%

“…[16] The linewidth Γ m of the mth FSBS resonant frequency that was related to the R 0,m acoustic mode was given by Γ m ¼ Γ m,int þ Γ mir , where Γ m,int was an acoustic modedependent inherent parameter that was related to the fiber cladding inhomogeneity and acoustic dissipation, and might be assumed as Γ m,int ¼ Ω m =1000. [17] In addition, Γ mir was boundary related and independent of the choice of m, which was govern by [15,18] DOI: 10.1002/adpr.202200298 Nowadays, forward Brillouin scattering in optical fibers has attracted massive research interests worldwide, owing to its great potential for applications in sensing, filtering, lasing, and all-optical signal processing, etc. The manipulation of spectrum properties of forward stimulated Brillouin scattering (FSBS) turns out to be particularly important for various application scenarios.…”

Section: Experimental Section 21 Simulation Processmentioning

confidence: 99%

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On the Fiber Geometry Dependence of Forward Stimulated Brillouin Scattering in Optical Fiber

Zhou

Zhao

Yang

et al. 2023

Advanced Photonics Research

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Nowadays, forward Brillouin scattering in optical fibers has attracted massive research interests worldwide, owing to its great potential for applications in sensing, filtering, lasing, and all‐optical signal processing, etc. The manipulation of spectrum properties of forward stimulated Brillouin scattering (FSBS) turns out to be particularly important for various application scenarios. However, the manipulation approaches are still very limited by now. Herein, for the first time to the best of one's knowledge, a thorough investigation on the fiber geometry dependence of FSBS effect in optical fibers is presented, where the dependencies of FSBS on fiber core diameter and cladding diameter are investigated, revealing the characteristics of FSBS in terms of linewidth, frequency interval, and nonlinear coefficient, etc. It is indicated in the result that changing the size of the fiber core/cladding might give rise to considerable modification of the FSBS spectrum. The investigation paves the way to engineer FSBS in optical fibers, where acousto‐optic interaction can be manipulated and the FSBS spectrum can be tailored by adjusting the geometric size of the fiber for various applications.

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“…[ 16 ] The linewidth

Γ_{normalm}

of the m th FSBS resonant frequency that was related to the

R_{0, m}

acoustic mode was given by

Γ_{normalm} = Γ_{m, int} + Γ_{mir}

, where

Γ_{m, int}

was an acoustic mode–dependent inherent parameter that was related to the fiber cladding inhomogeneity and acoustic dissipation, and might be assumed as

Γ_{m, int} = Ω_{normalm} / 1000

. [ 17 ] In addition,

Γ_{mir}

was boundary related and independent of the choice of m, which was govern by [ 15,18 ]

\frac{false| Z_{normalf} - Z false|}{Z_{normalf} + Z} = exp [- \frac{1}{2} Γ_{mir} t_{normalr}]

where

Z_{normalf}

is the mechanical impedance of the fiber and Z is the acoustic impedance of the environment, while

t_{normalr}

is the acoustic propagation delay across the fiber diameter. The nonlinear optomechanical coefficient of FSBS gain induced by each acoustic mode could be given by

γ^{false(normalm false)} false(Ω false) = γ_{0}^{false(normalm false)} \frac{1}{1 + {[Ω - Ω_{normalm}]}^{2} / {false[\frac{1}{2} Γ_{normalm} false]}^{2}}

where the maximum value

γ_{0}^{false(normalm false)}

is obtained on the resonant frequency of

…”

Section: Methodsmentioning

confidence: 99%

“…[ 15 ] It could be inferred that the nonlinear coefficient and the linewidth of FSBS would differ as the fiber geometric size changes, since

Q_{ES}^{false(normalm false)}, Q_{PE}^{false(normalm false)}, and Γ_{normalm}

were all radial parameters dependent. For the excitation of multiple acoustic modes, the total FSBS gain can be expressed as [ 17 ]

g false(Ω false) = \sum_{normalm} γ_{0}^{false(normalm false)} \frac{1}{1 + {[Ω - Ω_{normalm}]}^{2} / {false[\frac{1}{2} Γ_{normalm} false]}^{2}}

…”

Section: Methodsmentioning

confidence: 99%

Section: Experimental Section 21 Simulation Processmentioning

confidence: 99%

See 1 more Smart Citation

On the Fiber Geometry Dependence of Forward Stimulated Brillouin Scattering in Optical Fiber

Zhou

Zhao

Yang

et al. 2023

Advanced Photonics Research

View full text Add to dashboard Cite

show abstract

“…In addition to elastic light scattering, the abundant inelastic scattering effects in microfibers also provide useful tools for sensing applications. Recently, Brillouin scattering in microfiber has attracted increasing interest because the microfiber can strongly confine both optical and acoustic modes at a nanoscale and provide a unique platform to investigate photon-phonon interactions [247][248][249][250][251][252][253]. For optical sensing, Brillouin scattering may benefit the sensitivity and compactness of microfiber sensors, owing to the rise of surface acoustic waves.…”

Section: Frequency-based Sensorsmentioning

confidence: 99%

Recent Progress in Microfiber-Optic Sensors

Luo

Chen

2021

Photonic Sens

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Recently, microfiber-optic sensors with high sensitivity, fast response times, and a compact size have become an area of interest that integrates fiber optics and nanotechnology. Distinct advantages of optical microfiber, such as large accessible evanescent fields and convenient configurability, provide attractive benefits for micro- and nano-scale optical sensing. Here, we review the basic principles of microfiber-optic sensors based on a broad range of microstructures, nanostructures, and functional materials. We also introduce the recent progress and state-of-the-art in this field and discuss the limitations and opportunities for future development.

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“…In this paper, we propose a new solution to realize SPDC in fibers using a tapered standard telecommunication fiber [19][20][21][22][23]. The second-order nonlinearity is established through surface dipole and bulk multipole nonlinearities, that are exalted due to the sub-wavelength diameter of the nanofiber.…”

Section: Introductionmentioning

confidence: 99%

Modeling photon pair generation by second-order surface nonlinearity in silica nanofibers

Azzoune¹,

Delaye

Pauliat

2021

J. Opt. Soc. Am. B

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In this paper, we present a design of an all-fiber source of correlated photon pairs based on standard telecommunications tapered fibers. We examine the generation of correlated photon pairs using parametric process (") in silica tapered optical fibers. This nonlinear process is ensured thanks to surface dipole and bulk multipole nonlinearities. The process of photons creation is modeled by taking into account the vector aspect of the propagation of the optical field in a silica nanofiber. The phase matching is provided by propagating the pump field in one spatial mode, while generating a photon pair in another spatial mode. The generation efficiency of photon pairs depends on diameter uniformity of the nanofiber after the manufacturing process. We size this nanofiber for a good optimization of photon pair generation efficiency, we report that the tolerance in diameter uniformity is = 2 nm for a generation rate of photon pairs estimated to $% ≈ 22 000 pairs/s, for 1 W power pump and a nanofiber length of 1.1 mm. Deposits on the nanofiber can be used in order to relax the manufacturing constraints on diameter to maximize the generation rate of photon pairs. As an example, the use of Polytetrafluoroethylene (PTFE) on the nanofiber applied as a cladding whose thickness is infinite makes it possible to relax the constraints on the nanofiber diameter. For the same = 2 nm, a generation rate of photon pairs estimated to $% ≈ 78 000 pairs/s for 1 W power pump and a nanofiber length of 2.4 mm is predicted.

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Forward stimulated Brillouin scattering in optical nanofibers

Cited by 17 publications

References 38 publications

On the Fiber Geometry Dependence of Forward Stimulated Brillouin Scattering in Optical Fiber

On the Fiber Geometry Dependence of Forward Stimulated Brillouin Scattering in Optical Fiber

Recent Progress in Microfiber-Optic Sensors

Modeling photon pair generation by second-order surface nonlinearity in silica nanofibers

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