Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime

Shafiee, Golnoush; Strekalov, Dmitry; Otterpohl, Alexander; Sedlmeir, Florian; Schunk, Gerhard; Vogl, Ulrich; Schwefel, Harald G. L.; Leuchs, Gerd; Marquardt, Christoph

doi:10.1088/1367-2630/ab9a87

Cited by 8 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…appendix). Thus, experimentally it can be accessed in a Hanbury-Brown-Twiss experiment of the investigated marginal beam [36,40]. Luckily, the time-integral over a correlation function is tolerant against the jitter of the detectors and do not disturb the evaluation [28,41,42].…”

Section: P(∆t→∞)mentioning

confidence: 99%

“…We simulate the four-fold coincidence probability in the telecommunication wavelength range assuming Gaussian PDC spectra and indicate how the visibility of the HOM interference dip degrades in terms of the PDC multiphoton contributions. We note that each platform producing continuous-wave photon pairs has its highly individual spectral characteristics that needs to be thoroughly scrutinized to gain an accurate estimate of the background effects [35,36]. Further, we investigate the temporal characteristics of signal and idler cross-correlation [37] to show the practicality of this figure-of-merit as a PDC process parameter since the integral over it turns out to be expedient for calibrating the mean photon flux of the source in loss-independent manner.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Unfolding the Hong–Ou–Mandel interference between heralded photons from narrowband twin beams

et al. 2023

View full text Add to dashboard Cite

The Hong-Ou-Mandel (HOM) interference is one of the most intriguing quantum optical phenomena and crucial in performing quantum optical communication and computation tasks. Lately, twin beam emitters such as those relying on the process of parametric down-conversion (PDC) have become confident sources of heralded single photons. However, if the pump power is high enough, the pairs produced via PDC—often called signal and idler—incorporate multiphoton contributions that usually distort the investigated quantum features. Here, we derive the temporal characteristics of the HOM interference between heralded states from two independent narrowband PDC sources. Apart from the PDC multiphoton content, our treatment also takes into account effects arriving from an unbalanced beam splitter ratio and optical losses. We perform a simulation in the telecommunication wavelength range and provide a useful tool for finding the optimal choice for PDC process parameters. Our results offer insight in the properties of narrowband PDC sources and turn useful when driving quantum optical applications with them.

show abstract

Section: P(∆t→∞)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Unfolding the Hong–Ou–Mandel interference between heralded photons from narrowband twin beams

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Equation (3) has been widely applied for PDC processes where the nonlinear coupling coefficient κ is real [3,[7][8][9]. However, in a more general case of coupled phase-conjugated fields, such as four-wave mixing (FWM) near atomic resonances [10][11][12], the nonlinear coupling coefficient κ can take a complex value involving complicated atomic transitions.…”

Section: Introductionmentioning

confidence: 99%

Quantum Langevin theory for two coupled phase-conjugated electromagnetic waves

Jiang¹,

Mei²,

Du³

2023

Preprint

View full text Add to dashboard Cite

While loss-gain-induced Langevin noises have been intensively studied in quantum optics, the effect of a complex-valued nonlinear coupling coefficient on the noises of two coupled phase-conjugated optical fields has never been questioned before. Here, we provide a general macroscopic phenomenological formula of quantum Langevin equations for two coupled phase-conjugated fields with linear loss (gain) and complex nonlinear coupling coefficient. The macroscopic phenomenological formula is obtained from the coupling matrix to preserve the field commutation relations and correlations, which does not require knowing the microscopic details of light-matter interaction and internal atomic structures. To validate this phenomenological formula, we take spontaneous four-wave mixing in a double-Λ four-level atomic system as an example to numerically confirm that our macroscopic phenomenological result is consistent with that obtained from the microscopic Heisenberg-Langevin theory. Finally, we apply the quantum Langevin equations to study the effects of linear gain and loss, complex phase mismatching, as well as complex nonlinear coupling coefficient in entangled photon pair (biphoton) generation, particularly to their temporal quantum correlations.

show abstract

“…In low loss materials quality (Q) factors of over one hundred million have readily been achieved in varying * harald.schwefel@otago.ac.nz geometries [15,16], leading to applications in optical sensing [17,18], and when an optically non-linear material is used [19], resulting in generation of frequency combs [20,21]. An extended list of applications of WGM resonators also includes non-linear photonics [22,23], quantum optics [14,[24][25][26], microwave to optical conversion [27][28][29], optical communication [30][31][32], electrooptical modulation [33], and lasers [34].…”

Section: Introductionmentioning

confidence: 99%

Dielectric perturbations: anomalous resonance frequency shifts in optical resonators

Azeem,

Trainor,

Devane

et al. 2020

Preprint

View full text Add to dashboard Cite

Small perturbations in the dielectric environment around a high quality whispering gallery mode resonator usually lead to a frequency shift of the resonator modes directly proportional to the polarizability of the perturbation. Here, we report experimental observations of strong frequency shifts that can be opposite and even exceed the contribution of the perturbations' polarizability. The mode frequencies of a lithium niobate whispering gallery mode resonator are shifted using substrates of refractive indices ranging from 1.50 to 4.22. Both blue-and red-shifts are observed, as well as an increase in mode linewidth, when substrates are moved into the evanescent field of the whispering gallery mode. We compare the experimental results to a theoretical model by Foreman et al. [1] and provide an additional intuitive explanation based on the Goos-Hänchen shift for the optical domain.

show abstract

Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime

Cited by 8 publications

References 50 publications

Unfolding the Hong–Ou–Mandel interference between heralded photons from narrowband twin beams

Unfolding the Hong–Ou–Mandel interference between heralded photons from narrowband twin beams

Quantum Langevin theory for two coupled phase-conjugated electromagnetic waves

Dielectric perturbations: anomalous resonance frequency shifts in optical resonators

Contact Info

Product

Resources

About