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Reduction of Guided Acoustic Wave Brillouin Scattering in Photonic Crystal Fibers

Reduction of Guided Acoustic Wave Brillouin Scattering in Photonic Crystal Fibers,10.1103/PhysRevLett.97.133901,Physical Review Letters,D. Elser,U. L.

Reduction of Guided Acoustic Wave Brillouin Scattering in Photonic Crystal Fibers   (Citations: 12)
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Guided acoustic wave Brillouin scattering (GAWBS) generates phase and polarization noise of light propagating in glass fibers. This excess noise affects the performance of various experiments operating at the quantum noise limit. We experimentally demonstrate the reduction of GAWBS noise in a photonic crystal fiber in a broad frequency range by tailoring the acoustic modes using the photonic also as a phononic crystal. We compare the noise spectrum to the one of a standard fiber and observe a tenfold noise reduction in the frequency range up to 200 MHz. Based on our measurement results as well as on numerical simulations, we establish a model for the reduction of GAWBS noise in photonic crystal fibers.
Journal: Physical Review Letters - PHYS REV LETT , vol. 97, no. 13, 2006
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    • ...Elser et al. [21] experimentally observed a reduction in depolarized GAWBS (below 1 GHz) due to the mechanical isolation of the core from the outer cladding by the air-holes of the inner cladding for a specific PCF...
    • ...Likewise, Elser et al. [21] and Beugnot et al. [23] have run simulations of the transverse acoustic modes (the eigenmodes of the structure) for a few fibers to further back up their experimental data but have not extended their study to a broader class of fibers through simulation...
    • ...Elser et al. and others have suggested [21], [23], [27] that the holey structure can cause the core to be more isolated from the outer cladding and that, when the air-filling fraction is high enough, an acoustic mode (or modes) of a higher frequency can become trapped in the core...

    John E. McElhennyet al. Dependence of Frequency Shift of Depolarized Guided Acoustic Wave Bril...

    • ...Guided acoustic wave Brillouin scattering (GAWBS), a weak forward scattering that stems from the interaction of light with thermally excited transverse phonons, has been studied in both standard fibres [1] and photonic crystal fibres [2, 3]. The acoustic phonon vibrations modulate the stress distribution in the silica fibre core, thus modulating the refractive index and inducing polarization and phase noise in the light field...

    W. Zhonget al. Polarization noise induced by photon-phonon interaction in hollow-core...

    • ... This forward-scattering effect results from the interaction of core-guided light with acoustic resonances of the entire fibre cross-section, and is viewed as a noise source in quantum-optics experiment...

    M. S. Kanget al. Tightly trapped acoustic phonons in photonic crystal fibres as highly ...

    • ... In addition, the insensitivity of birefringence to temperature fluctuation and reduced guided acoustic wave Brillouin scattering in the PC...

    Nobuyuki Matsudaet al. Observation of optical-fibre Kerr nonlinearity at the single-photon le...

    • ...Elser et al. [2] suppressed GAWBS in the low frequency range by making the air-silica inner cladding a phononic bandgap...
    • ...In previous studies [2,3], the authors have indicated that the high frequency acoustic resonances in PCFs and localized to the core result in the suppression of most of the GAWBS modes in the low frequency regime, below the highest frequency acoustic resonance...

    John E. McElhennyet al. Depolarized guided acoustic wave Brillouin scattering in photonic crys...

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