Coherent laser detection by frequency-shifted optical feedback

Lacot, Éric; Day, R.; Stoeckel, F.

doi:10.1103/physreva.64.043815

Cited by 120 publications

(103 citation statements)

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“…Compared to conventional optical heterodyne detection, frequency shifted optical feedback allows for several order of magnitude higher intensity modulation contrast [12][13][14]. In the case of weak optical feedback, the laser dynamics is linear and the maximum of the modulation is obtained when the frequency shift is resonant with the laser relaxation oscillation frequency.…”

Section: Nonlinear Modification Of the Laser Noise Power Spectrum Indmentioning

confidence: 99%

“…In previous studies [12][13][14], we had already demonstrated that the detection of frequency shifted optical feedback is shot noise limited and that the RF power spectrum is given by : Eqs. (10) and (11) show that shape of the noise power spectrum is linked to the amplification gain of the laser dynamics (   L G  )and that the amplitude of the intensity relaxation oscillations induced by the laser quantum noise is proportional to the square root of the laser output power : In agreement with our numerical simulations (Figs.…”

Section: Nonlinear Modification Of the Laser Noise Power Spectrum Indmentioning

confidence: 99%

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Nonlinear modification of the laser noise power spectrum induced by frequency-shifted optical feedback

et al. 2016

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In this article, we study the non-linear coupling between the stationary (i.e. the beating modulation signal) and transient (i.e. the laser quantum noise) dynamics of a laser subjected to frequency shifted optical feedback. We show how the noise power spectrum and more specifically the relaxation oscillation frequency of the laser are modified under different optical feedback condition. Specifically we study the influence of (i) the amount of light returning to the laser cavity and (ii) the initial detuning between the frequency shift and intrinsic relaxation frequency. The present work shows how the relaxation frequency is related to the strength of the beating signal and the shape of the noise power spectrum gives an image of the Transfer Modulation Function (i.e. of the amplification gain) of the nonlinear-laser dynamics.The theoretical predictions, confirmed by numerical resolutions, are in good agreements with the experimental data.

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Section: Nonlinear Modification Of the Laser Noise Power Spectrum Indmentioning

confidence: 99%

Section: Nonlinear Modification Of the Laser Noise Power Spectrum Indmentioning

confidence: 99%

Nonlinear modification of the laser noise power spectrum induced by frequency-shifted optical feedback

et al. 2016

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“…Maximal gain is obtained when the shift frequency is resonant with the relaxation frequency of the laser. One thus obtains shotnoise limited method of detection which is very easy to implement [14]. Fig.…”

Section: Principlementioning

confidence: 99%

Cell imaging by coherent backscattering microscopy using frequency-shifted optical feedback in a microchip laser

et al. 2008

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“…An attenuator ATT is placed between the lens group and the mirrors to adjust the intensities of the feedback lights. According to the rate equation model [10], the laser power is heterodyne modulated by the frequency-shift feedback, and the modulation frequency equals to the shift frequency of the feedback lights, which can be expressed as…”

Section: Experimental Setup and Principlesmentioning

confidence: 99%

Refractive Index Measurement of Liquids by Double-Beam Laser Frequency-Shift Feedback

Zhang

Tan

et al. 2016

IEEE Photon. Technol. Lett.

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The liquid refractive index measurement has become an important process in many research and industrial applications. However, the measurement results using traditional methods cannot be calibrated, and the corresponding accuracy is limited, since those methods cannot trace to laser wavelength. This letter describes a novel method to measure the liquid refractive index based on the double-beam laser frequency-shift feedback. The two beams are incident on the liquid surface and the mirror under liquid, respectively. Utilizing the high sensitivity of the frequency-shift feedback of solid lasers and high stability of heterodyne interference, the height variation of the liquid surface and the depth variation of the mirror under liquid are measured. Addressing these two variations, the traceable measurement of liquid refractive index is realized. The measurement results of five different liquid samples and NaCl solution with various concentrations are presented, which proved the system has high repeatability of better than 0.00005.

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Coherent laser detection by frequency-shifted optical feedback

Cited by 120 publications

References 20 publications

Nonlinear modification of the laser noise power spectrum induced by frequency-shifted optical feedback

Nonlinear modification of the laser noise power spectrum induced by frequency-shifted optical feedback

Cell imaging by coherent backscattering microscopy using frequency-shifted optical feedback in a microchip laser

Refractive Index Measurement of Liquids by Double-Beam Laser Frequency-Shift Feedback

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