Spectral filtering within the Schawlow-Townes linewidth as a diagnostic tool for studying laser phase noise

Neelen, R. Centeno; Boersma, D.; Exter, M. P. van; Nienhuis, G.; Woerdman, J. P.

doi:10.1016/0030-4018(93)90591-r

Cited by 14 publications

(12 citation statements)

References 31 publications

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“…We shall refer to this correlation tendency to bunch when ω 1 ≈ ω 2 and is small (as compared to the relevant linewidths in the system) as indistinguishability bunching. This effect has been observed experimentally in the filtering of a single-mode laser [22].…”

Section: Theory Of One-and Two-photon Spectramentioning

confidence: 52%

“…Their origin, as for the leapfrogs, stems from the uncertainty introduced by including the detector physics, which extends the interference appearing at the points ( ± , 0) and ( ± , ± ) to two circles. At the centre of these interference rings, ( ± /2, ± /2), two red spots of enhanced emission appear from the concentration of leapfrog outer lines in the Jaynes-Cummings model, equations (22). With a narrower detector, leapfrogs are enhanced due to the longer uncertainty in the time of two-photon emission, as shown in figures 6(g) and (h).…”

Section: Lasing and The Mollow Tripletmentioning

confidence: 90%

See 1 more Smart Citation

Two-photon spectra of quantum emitters

González-Tudela¹,

Laussy²,

Tejedor³

et al. 2013

New J. Phys.

147

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We apply our recently developed theory of frequency-filtered and timeresolved N -photon correlations [1] to study the two-photon spectra of a variety of systems of increasing complexity: single mode emitters with two limiting statistics (one harmonic oscillator or a two-level system) and the various combinations that arise from their coupling. We consider both the linear and nonlinear regimes under incoherent excitation. We find that even the simplest systems display a rich dynamics of emission, not accessible by simple single photon spectroscopy. In the strong coupling regime, novel two-photon emission processes involving virtual states are revealed. Furthermore, two general results are unraveled by two-photon correlations with narrow linewidth detectors: i) filtering induced bunching and ii) breakdown of the semi-classical theory. We show how to overcome this shortcoming in a fully-quantized picture.

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Section: Theory Of One-and Two-photon Spectramentioning

confidence: 52%

Section: Lasing and The Mollow Tripletmentioning

confidence: 90%

Two-photon spectra of quantum emitters

González-Tudela¹,

Laussy²,

Tejedor³

et al. 2013

New J. Phys.

147

View full text Add to dashboard Cite

show abstract

“…Experimentally, the two-photon spectrum corresponds to the usual Hanbury Brown-Twiss setup to measure second-order correlations through photon counting, with filters or monochromators being placed in front of the detectors to select two, in general different, frequency windows. The technique has been amply used in the laboratory [15,16,22,[42][43][44][45][46][47][48][49], but lacking hitherto a general theoretical description, the global picture provided here has not yet been achieved experimentally. Note finally that when considering correlations between equal frequencies, ω = ω 1 = ω 2 , the result is equivalent to placing a single filter before measuring the correlations of the outcoming photon stream [36] or embedding the quantum dot in a cavity and measuring the correlations from the emission of a weakly coupled cavity mode with frequency ω.…”

Section: Two-photon Spectrummentioning

confidence: 99%

Distilling one, two and entangled pairs of photons from a quantum dot with cavity QED effects and spectral filtering

Valle

2013

New J. Phys.

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A quantum dot can be used as a source of one-and two-photon states and of polarization entangled photon pairs. The emission of such states is investigated here from the point of view of frequency-resolved two-photon correlations. These follow from a spectral filtering of the dot emission, which can be achieved either by using a cavity or by placing a number of interference filters before the detectors. A combination of these various options is used to iteratively refine the emission in a 'distillation' process and arrive at highly correlated states with a high purity. The so-called 'leapfrog processes', where the system undergoes a direct transition from the biexciton state to the ground state by direct emission of two photons, are shown to be central to the quantum features of such sources. Optimum configurations are singled out in a global theoretical picture that unifies the various regimes of operation.

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“…However, in the limit Γ < γ, the additional effect of "indistinguishability bunching" [18] also becomes relevant. This phenomena originates in the quantum fluctuations of the light field [43,44] and has been observed to lead to photon bunching when filtering at less than the natural linewidth of a light source, even for a classical input state such as a laser [45]. In the case of the RF spectrum considered here, the filtering is narrow compared to the incoherent Rayleigh peak but still broad compared to the coherent component.…”

Section: Takedownmentioning

confidence: 94%

Photon Statistics of Filtered Resonance Fluorescence

et al. 2020

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Spectral filtering of resonance fluorescence is widely employed to improve single photon purity and indistinguishability by removing unwanted backgrounds. For filter bandwidths approaching the emitter linewidth, complex behavior is predicted due to preferential transmission of components with differing photon statistics. We probe this regime using a Purcell-enhanced quantum dot in both weak and strong excitation limits, finding excellent agreement with an extended sensor theory model. By changing only the filter width, the photon statistics can be transformed between antibunched, bunched, or Poissonian. Our results verify that strong antibunching and a subnatural linewidth cannot simultaneously be observed, providing new insight into the nature of coherent scattering.

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Spectral filtering within the Schawlow-Townes linewidth as a diagnostic tool for studying laser phase noise

Cited by 14 publications

References 31 publications

Two-photon spectra of quantum emitters

Two-photon spectra of quantum emitters

Distilling one, two and entangled pairs of photons from a quantum dot with cavity QED effects and spectral filtering

Photon Statistics of Filtered Resonance Fluorescence

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