Spectral characterization of photon-pair sources via classical sum-frequency generation

Abstract

Tailoring spectral properties of photon pairs is of great importance for optical quantum information and measurement applications. High-resolution spectral measurement is a key technique for engineering spectral properties of photons, making them ideal for various quantum applications. Here we demonstrate spectral measurements and optimization of frequency-entangled photon pairs produced via spontaneous parametric downconversion (SPDC), utilizing frequency-resolved sum-frequency generation (SFG), the reverse process of SPDC. A joint phase-matching spectrum of a nonlinear crystal around 1580 nm is captured with a 40 pm resolution and a > 40 dB signal-to-noise ratio, significantly improved compared to traditional frequency-resolved coincidence measurements. Moreover, our scheme is applicable to collinear degenerate sources whose characterization is difficult with previously demonstrated stimulated difference frequency generation (DFG). We also illustrate that the observed phase-matching function is useful for finding an optimal pump spectrum to maximize the spectral indistinguishability of SPDC photons. We expect that our precise spectral characterization technique will be useful tool for characterizing and tailoring SPDC sources for a wide range of optical quantum applications

References in corpus (21)

• Multi-photon entanglement and interferometry
• 12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric down-conversion
• Frequency-encoded photonic qubits for scalable quantum information processing
• Quantum optical coherence tomography with dispersion cancellation
• Probing multimode squeezing with correlation functions
• Fiber-assisted single-photon spectrograph
• Conditional preparation of single photons using parametric downconversion: A recipe for purity
• Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission
• Heralded single-photon source utilizing highly nondegenerate, spectrally factorable spontaneous parametric downconversion
• Two-photon coincident-frequency-entanglement via extended phase matching
• Quantum-memory-assisted multi-photon generation for efficient quantum information processing
• Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths
• Efficient and pure femtosecond-pulse-length source of polarization-entangled photons
• Schmidt Analysis of Pure-State Entanglement
• Stable, high-performance operation of a fiber-coupled superconducting nanowire avalanche photon detector
• Noncollinear parametric fluorescence by chirped quasi-phase matching for monocycle temporal entanglement
• Efficient generation and spectral characterization of spectrally factorable biphotons
• Direct characterization of a nonlinear photonic circuit's wave function with laser light
• Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion
• The effect of scattering loss on connections between classical and quantum processes in second-order nonlinear waveguides
• Four-Photon Quantum Interferometry at a Telecom Wavelength

Cited by in corpus (4)

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• Spectrally pure photon pair generation in asymmetric heterogeneously coupled waveguides
• Optimized Spectral Purity of Heralded Single Photons at the Telecom O-Band