Optimized Spectral Purity of Heralded Single Photons at the Telecom O-Band

• URL: http://arxiv.org/abs/2501.14214v1
• Date: Fri, 24 Jan 2025 03:43:19 GMT
• Title: Optimized Spectral Purity of Heralded Single Photons at the Telecom O-Band
• Authors: Wu-Hao Cai, Soyoung Baek, Rui-Bo Jin, Fumihiro Kaneda,
• Abstract summary: We numerically searched for various group-velocity-matching conditions and corresponding optimal poling structures of a potassium titanyl phosphate crystal. Our poling optimization results using phase-matching coherence-length and sub-coherence-length modulation schemes show > 99.4% spectral purity with pump wavelengths ranging from 603.8 nm to 887.3 nm. This study will pave the way for developing practical quantum sources for quantum information applications at the telecom O-band.
• Score: 0.0
• License:
• Abstract: We report on optimizing the spectral purity of heralded single photons in the telecom O-band, where single photons can be propagated with low loss and low dispersion in a standard telecom optical fiber. We numerically searched for various group-velocity-matching conditions and corresponding optimal poling structures of a potassium titanyl phosphate crystal for spontaneous parametric downconversion. Our poling optimization results using phase-matching coherence-length and sub-coherence-length modulation schemes show > 99.4% spectral purity with pump wavelengths ranging from 603.8 nm to 887.3 nm. Some optimized configurations are feasible with off-the-shelf lasers and single-photon detectors. Moreover, by investigating noise photon spectra for different poling optimization methods, we show that, in practice, appropriate, gentle spectral filtering helps achieve high purity. This study will pave the way for developing practical quantum sources for quantum information applications at the telecom O-band.

Related papers

• Performance analysis of different photon-mediated entanglement generation schemes under optical dephasing and spectral diffusion [6.7626967426943745]
  Solid-state quantum emitters offer qubit systems that integrate well with chip-scale photonic and electronic devices. We compare the performance of three common photon-mediated entanglement schemes under realistic noise for solid-state quantum emitters.
  arXiv  Detail & Related papers  (2024-12-13T09:02:18Z)
• Singly poled thin film lithium niobate waveguide as a tunable source of photon pairs across telecom band [0.0]
  We report on a strongly dispersive, singly poled thin film lithium niobate (TFLN) waveguide geometry which acts as a convertible source of photon pairs across telecom band with tunable spectral properties. We believe that such a versatile source of photon pairs will serve as an important ingredient in various quantum optical tasks which require photons at different telecom bands and desired spectral properties.
  arXiv  Detail & Related papers  (2024-11-26T12:25:10Z)
• Ultrabright fiber-coupled ploarization-entangled photon source with spectral brightness surpassing 2.0 MHz/mW/nm [0.6581049960856515]
  We present an ultrabright polarization-entangled photon source that is optimally coupled into single-mode fibers. By employing a simple mode-matching optical setup, we optimize the SMF coupling and heralding efficiencies of the photon-pairs. This represents the highest spectral brightness of SPDC photons generated using a CW laser pumped bulk crystal to date.
  arXiv  Detail & Related papers  (2024-09-23T23:50:03Z)
• Shaping Single Photons through Multimode Optical Fibers using Mechanical Perturbations [55.41644538483948]
  We show an all-fiber approach for controlling the shape of single photons and the spatial correlations between entangled photon pairs. We optimize these perturbations to localize the spatial distribution of a single photon or the spatial correlations of photon pairs in a single spot.
  arXiv  Detail & Related papers  (2023-06-04T07:33:39Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• High quality entanglement distribution through telecommunication fiber using near-infrared non-degenerate photon pairs [73.4643018649031]
  In urban environments, the quantum channel in the form of telecommunication optical fiber (confirming to ITU G.652D standards) are available. We investigate the possibility that for campus-type communications, entangled photons prepared in the Near-Infrared Range (NIR) can be transmitted successfully.
  arXiv  Detail & Related papers  (2022-09-09T03:23:11Z)
• Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source [49.06242674127539]
  We experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DoFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
  arXiv  Detail & Related papers  (2021-12-06T21:37:43Z)
• Complete conversion between one and two photons in nonlinear waveguides with tailored dispersion [62.997667081978825]
  We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides. We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance.
  arXiv  Detail & Related papers  (2021-10-06T23:49:44Z)
• Spectral characterization of photon-pair sources via classical sum-frequency generation [0.0]
  High-resolution spectral measurement is a key technique for engineering spectral properties of photons. We demonstrate spectral measurements and optimization of frequency-entangled photon pairs produced via spontaneous parametric downconversion (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.
  arXiv  Detail & Related papers  (2020-10-15T11:52:12Z)
• Spontaneous Parametric Down-Conversion from Subwavelength Nonlinear Films [0.0]
  We demonstrate photon pair generation via spontaneous parametric down-wavelength (SPDC) from subconversion films. We obtained photon pairs with a spectral bandwidth of 500;nm, limited only by the overall detection efficiency. Our experiments lay the groundwork for the future development of flat SPDC sources, including QOM.
  arXiv  Detail & Related papers  (2020-09-01T10:07:11Z)
• Spectral Compression of Narrowband Single Photons with a Resonant Cavity [62.997667081978825]
  We experimentally demonstrate a spectral compression scheme for heralded single photons with narrow spectral bandwidth around 795 nm. We observe a compression from 20.6 MHz to less than 8 MHz, almost matching the corresponding atomic transition.
  arXiv  Detail & Related papers  (2020-01-02T13:08:59Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.