Spectral noise in frequency conversion from the visible to the telecommunication C-band

Strassmann, Peter Clemens; Martin, Anthony; Gisin, Nicolas; Afzelius, Mikael

doi:10.1364/oe.27.014298

Cited by 13 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The WC-TPC has two important parameters: noise floor level and signalto-noise ratio (SNR). The noise floor level is influenced by many factors, including the presence of a residual laser, which can induce other nonlinear processes such as SPDC and Raman scattering 36,37 , dark counts in the detector, and stray light (related results are presented in Supplementary Note 5).…”

Section: Resultsmentioning

confidence: 99%

“…The noise floor level is influenced by many factors, including the presence of a residual laser, which can induce other nonlinear processes such as SPDC and Raman scattering [36] [37], dark counts in the detector, and stray light (related results are presented in the Supplementary note 5). Two-photon correlation was characterized by the normalized second-order signal-idler correlation coefficient g 𝑠,𝑖…”

Section: Wavelength-converted Two-photon Combmentioning

confidence: 99%

“…In previous studies, cavity-enhanced spontaneous parametric down conversion (SPDC) photon sources were demonstrated for many applications 20 ; for example, demonstrating theoretical/ proof-of-principle models [21][22][23][24][25][26] , highly bright single modes [27][28][29][30][31] , and narrow linewidths [32][33][34][35] . On the other hand, for compatibility between telecom and QM absorption line, wavelength conversion (WC) is demonstrated using a laser 36,37 and single photons 38,39 for application to nitrogen-vacancy centers, rare-earth-doped crystals, quantum dots, and rubidium gas, among others. Wavelength conversion still has difficulty about conversion efficiency and noise photon to realize photonic interface.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

et al. 2020

View full text Add to dashboard Cite

Quantum computing and quantum communication, have been greatly developed in recent years and expected to contribute to quantum internet technologies, including cloud quantum computing and unconditionally secure communication. However, long-distance quantum communication is challenging mainly because of optical fiber losses; quantum repeaters are indispensable for fiber-based transmission because unknown quantum states cannot be amplified with certainty. In this study, we demonstrate a versatile entanglement source in the telecom band for fiber-based quantum internet, which has a narrow linewidth of sub-MHz range, entanglement fidelity of more than 95%, and Bell-state generation even with frequency multimode. Furthermore, after a total distribution length of 20-km in fiber, twophoton correlation is observed with an easily identifiable normalized correlation coefficient, despite the limited bandwidth of the wavelength converter. The presented implementation promises an efficient method for entanglement distribution that is compatible with quantum memory and frequency-multiplexed long-distance quantum communication applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Wavelength-converted Two-photon Combmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The difference frequency generation (DFG) in nonlinear crystal is often used for frequency down conversion [20][21][22][23][24]. In recent years, it is a very attractive research field to convert light field from storage band to communication band by using DFG.…”

Section: Introductionmentioning

confidence: 99%

Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band

Bao

Deng

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

Quantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication, we demonstrate a frequency conversion interface from rubidium D1 line (795 nm) to the optical communication L-band (1621 nm) based on difference frequency generation. To reduce broadband noise of spontaneous Raman scattering caused by strong pumping light, we use a combination of two cascaded etalons and a Fabry-Perot cavity with low finesse to narrow the noise bandwidth to 11.7 MHz. The filtering system is built by common optical elements and is easy to use; it can be widely applied in frequency conversion process. We show that the signal-noise ratio of the converted field is good enough to reduce the input photon number below 1 under the condition of low external device conversion efficiency (0.51%) and large duration of input pulse (250 ns). The demonstrated frequency conversion interface has important potential application in quantum networks.

show abstract

“…In 2018, Dreau et al [11] converted spin-selective photons at 637 nm, associated with the coherent nitrogen-vacancy zero-phonon line, to the target wavelength of 1588 nm, the conversion efficiency was ∼ 17% and the SNR was ∼ 7. Many groups have also reported relevant research works [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Two-way single-photon-level frequency conversion between 852nm and 1560nm for connecting cesium D2 line with the telecom C-band

Zhang,

He,

Wang

2020

Preprint

View full text Add to dashboard Cite

A compact setup for two-way single-photon-level photonic conversion between 852 nm and 1560 nm has been implemented with the same periodically-poled magnesium-oxide-doped lithium niobate (PPMgO:LN) bulk crystals for connecting cesium atomic D2 transition (852 nm) to telecom C-band. By single-pass mixing a strong continuous-wave pump laser at 1878 nm and the single-photon-level periodical signal pulses with a mean photon number of ∼ 1 per pulse in a 50-mm-long PPMgO:LN bulk crystal, the conversion efficiency of ∼ 1.7 % (∼ 2.0 %) for 852-nm to 1560-nm down-conversion (1560-nm to 852-nm up-conversion) have been achieved. We analyzed noise photons induced by the strong pump laser beam, including the spontaneous Raman scattering (SRS) and the spontaneous parametric down-conversion (SPDC) photons, and the photons generated in the cascaded nonlinear processes. The signal-to-noise ratio (SNR) has been improved remarkably by using the narrow-band filters and changing polarization of the noise photons in DFG process. With further improvement of the conversion efficiency by employing PPMgO:LN waveguide, instead of bulk crystal, our study may provide the basics for cyclic photon conversion in quantum network.

show abstract

Spectral noise in frequency conversion from the visible to the telecommunication C-band

Cited by 13 publications

References 30 publications

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band

Two-way single-photon-level frequency conversion between 852nm and 1560nm for connecting cesium D2 line with the telecom C-band

Contact Info

Product

Resources

About