Experimental investigation on line width compression of stimulated Brillouin scattering in water

Zhang, Lei; Zhang, Dong; Yang, Zhuo; Shi, Jianzhong; Liu, Dahe; Gong, Wei; Fry, Edward S.

doi:10.1063/1.3595338

Cited by 24 publications

(8 citation statements)

References 14 publications

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“…Numerous schemes for spectral compression of broadband classical light have been demonstrated by using various compressor units and second-order nonlinear crystals. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Nonlinear frequency conversion could be used to generate the long narrowband pulse light, [24][25][26][27][28][29] such as sum frequency generation (SFG) in periodically poled lithium niobate (PPLN) waveguide. [30][31][32] Recently, a theoretical scheme has been proposed for spectral compression and frequency conversion of quantum light pulse.…”

Section: Introductionmentioning

confidence: 99%

Spectral compression of single-photon-level laser pulse

Xiang

Nie

et al. 2017

Sci Rep

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We experimentally demonstrate that the bandwidth of single photons laser pulse is compressed by a factor of 58 in a periodically poled lithium niobate (PPLN) waveguide chip. A positively chirped single photons laser pulse and a negatively chirped classical laser pulse are employed to produce a narrowband single photon pulse with new frequency through sum-frequency generation. In our experiment, the frequency and bandwidth of single photons at 1550 nm are simultaneously converted. Our results mark a critical step towards the realization of coherent photonic interface between quantum communication at 1550 nm and quantum memory in the near-visible window.

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Section: Introductionmentioning

confidence: 99%

Spectral compression of single-photon-level laser pulse

Xiang

Nie

et al. 2017

Sci Rep

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“…Among the latest Brillouin scattering signal detection tech niques, the excitedstate Faraday anomalous dispersion opti cal filter (ESFADOF) technique, including a key element that yields a rather high field achieved by a special component called the Halbach cylinders, can obtain both the frequency shifts of intensity and linewidth, using differently oriented edge filters, which have been used for remotely and rapidly measuring temperature profiles of oceans [11]. Besides, a relatively simple spectrum detected technique based on Fabry-Pérot (F-P) etalon combined with an intensified charge coupled device (ICCD) [12,13] is developed to quickly obtain the whole Brillouin spectrum. However, the backscattered sig nal obtained by the F-P etalon and ICCD is displayed as a 2D fringe pattern, which needs to be further processed to measure the Brillouin shift and linewidth.…”

Section: Introductionmentioning

confidence: 99%

The effect of signal to noise ratio on accuracy of temperature measurements for Brillouin lidar in water

Liang

Niu

Wu³

et al. 2017

Laser Phys.

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A lidar system with Fabry-Pérot etalon and an intensified charge coupled device can be used to obtain the scattering spectrum of the ocean and retrieve oceanic temperature profiles. However, the spectrum would be polluted by noise and result in a measurement error. To analyze the effect of signal to noise ratio (SNR) on the accuracy of measurements for Brillouin lidar in water, the theory model and characteristics of SNR are researched. The noise spectrums with different SNR are repetitiously measured based on simulation and experiment. The results show that accuracy is related to SNR, and considering the balance of time consumption and quality, the average of five measurements is adapted for real remote sensing under the pulse laser conditions of wavelength 532 nm, pulse energy 650 mJ, repetition rate 10 Hz, pulse width 8 ns and linewidth 0.003 cm −1 (90 MHz). Measuring with the Brillouin linewidth has a better accuracy at a lower temperature (<15 °C), while measuring with the Brillouin shift is a more appropriate method at a higher temperature (>15 °C), based on the classical retrieval model we adopt. The experimental results show that the temperature error is 0.71 °C and 0.06 °C based on shift and linewidth respectively when the image SNR is at the range of 3.2 dB-3.9 dB.

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“…[4][5][6][7] Recently, a method for measurement of seawater temperature through Brillouin shift 8 has been proposed. Methods to acquire them have been studied widely in recent years.…”

Section: Introductionmentioning

confidence: 99%

Research on simultaneous measurement of ocean temperature and salinity using Brillouin shift and linewidth

Liang

et al. 2012

Opt. Eng

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The Brillouin backscattered signal of LIDAR can be used in remote sensing of ocean parameters such as temperature. Current methods for measuring ocean temperature are based on the monotropic function between Brillouin shift and ocean temperature, while the effect of the ocean salinity, which influences the measurement of temperature, is neglected. However, the variations in salinity will also lead to nonignorable change of the temperature. Neglecting it will result in an inaccurate measurement of temperature. We first propose a new model that takes both Brillouin shift and linewidth as independent variables, and then establish the multi-valued equations of these variables and ocean parameters. With a data fitting procedure the ocean temperature and salinity can be measured simultaneously. The accuracy of this model and the uncertainty of the measurement are analyzed. Theoretical and experimental analysis showed that the ocean temperature and salinity can be simultaneously obtained by measured Brillouin frequency shift and linewidth.

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Experimental investigation on line width compression of stimulated Brillouin scattering in water

Cited by 24 publications

References 14 publications

Spectral compression of single-photon-level laser pulse

Spectral compression of single-photon-level laser pulse

The effect of signal to noise ratio on accuracy of temperature measurements for Brillouin lidar in water

Research on simultaneous measurement of ocean temperature and salinity using Brillouin shift and linewidth

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