Enhancing the detectivity of an upconversion single-photon detector by spatial filtering of upconverted parametric fluorescence

Meng, Lichun; Høgstedt, Lasse; Tidemand-Lichtenberg, Peter; Pedersen, Christian; Rodrigo, Peter John

doi:10.1364/oe.26.024712

Cited by 11 publications

(13 citation statements)

References 19 publications

(26 reference statements)

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“…Later on researchers have measured USPDC photon count rates of about 10 5 /sec in PPLN based upconverter for 1550 nm [83], [105]. Recently, Meng et al [116] measured the spatial distribution of the USPDC noise. They proposed a spatial filtering scheme using a pinhole and temperature tuning of the phase matching to reduce the USPDC count rate to ~ 10 3 /sec for signals in the telecom wavelength range.…”

Section: Optical Noise Generated In An Upconversion Module (Up-noise)mentioning

confidence: 99%

“…Nevertheless, care must be taken to avoid any undesired circumstances where both up-and downcoversion processes are phase matched [117]. Furthermore, noise investigations in [116] also contribute to the understanding of the up-noise in upconversion imaging systems, which have the same optical noise source as the upconversion detector. In particular, the unique spatial distribution of the USPDC noise (see Fig.…”

Section: Optical Noise Generated In An Upconversion Module (Up-noise)mentioning

confidence: 99%

“…The overlay plot for the USPDC noise at T = 40 °C shows that the noise varies radially not only in intensity but also in wavelength, λIR = λpλUSPDC/(λp -λUSPDC). Adapted from [116].…”

Section: Optical Noise Generated In An Upconversion Module (Up-noise)mentioning

confidence: 99%

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Parametric upconversion imaging and its applications

Barh¹,

Rodrigo²,

Meng³

et al. 2019

Adv. Opt. Photon.

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This article provides an extensive survey of nonlinear parametric upconversion infrared (IR) imaging, starting from its origin to date. Upconversion imaging is a successful innovative technique for IR imaging in terms of sensitivity, speed, and noise performance. In this approach, the IR image is frequency upconverted to form a visible/near-IR image through parametric three-wave mixing followed by detection using a silicon-based detector or camera. In 1968 (50 years back), J. E. Midwinter first demonstrated upconversion imaging from shortwave-IR (1.6 μm) to visible (484 nm) wavelength using a bulk lithium niobate crystal. This technique quickly gained interest, and several other groups demonstrated upconversion imaging further into the mid-and far-IR with significantly improved quantum efficiency. Although a few excellent reviews on upconversion imaging were published in the early 1970's, the rapid progress in recent years merits an updated comprehensive review. The topic includes linear imaging, nonlinear optics, and laser science, and has shown diverse applications. The scope of this article is to provide an in-depth knowledge of upconversion imaging theory. An overview of different phase matching conditions for the parametric process and the sensitivity of the upconversion detection system are discussed. Furthermore, different design considerations and optimization schemes are outlined for application-specific upconversion imaging. The article comprises a historical perspective of the technique, its most recent technological advances, specific outstanding issues, and some cutting-edge applications of upconversion in IR imaging.

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Section: Optical Noise Generated In An Upconversion Module (Up-noise)mentioning

confidence: 99%

Section: Optical Noise Generated In An Upconversion Module (Up-noise)mentioning

confidence: 99%

See 1 more Smart Citation

Parametric upconversion imaging and its applications

Barh¹,

Rodrigo²,

Meng³

et al. 2019

Adv. Opt. Photon.

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“…Typically, collinear geometry of interaction with quasi‐phase matching in periodically‐poled crystals is used in up‐conversion detectors. [ 4 ] Due to imperfect technologies for growing the poled nonlinear crystals, quasi‐phase matching is also achieved for SPDC processes. A high‐intensity pump leads to up‐converted spontaneous parametric down‐conversion ( USPDC ) [ 4 ] when a short‐wavelength pump (i.e., the wavelength of the pump is shorter than that of the signal) is used by the up‐conversion detector.…”

Section: Introductionmentioning

confidence: 99%

“…[ 4 ] Due to imperfect technologies for growing the poled nonlinear crystals, quasi‐phase matching is also achieved for SPDC processes. A high‐intensity pump leads to up‐converted spontaneous parametric down‐conversion ( USPDC ) [ 4 ] when a short‐wavelength pump (i.e., the wavelength of the pump is shorter than that of the signal) is used by the up‐conversion detector. USPDC is a parasitic process and it should be depressed in up‐conversion detectors.…”

Section: Introductionmentioning

confidence: 99%

Combined parametric down‐ and up‐conversion noncollinear processes under picosecond pumping in KTP, controlled by injection seeding

Vereshchagin

Morozov

et al. 2021

J Raman Spectroscopy

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A cascade mechanism of the emerging of a radiation in blue and red spectral ranges in the KTP crystal—combined non‐collinear parametric down‐ and up‐conversion—was discovered and experimentally investigated. To become observable this mechanism needs to be accompanied by a process of parametric amplification of the seeding wave. The non‐collinear optical parametric amplifier based on the KTP crystal, pumped by 532 nm picosecond pulses, was exploited to study combined noncollinear down‐conversion and up‐conversion processes. Narrowband seeding was provided by radiation of a picosecond optical parametric generator pumped by 355‐nm picosecond pulses synchronized with 532‐nm pulses. The corresponding phase matching conditions for both down‐ and up‐conversion stages were found out on the basis of the tuning curves calculated for the type II phase matching in the XOZ plane of the KTP crystal. When the wavelength and noncollinearity angle of the seeding matched any signal wave of the down‐conversion stage, the seeding was amplified. Along with this, a radiation appeared in the visible part of the spectrum, which was not observed without seeding amplification. The wavelengths and spatial patterns of the radiation arisen, corresponded to some phasematched processes of sum frequency generation between the signal and idler waves existing in the crystal at the down‐conversion stage. Being very weak, these processes are usually unobserved. Thus, injection seeding allows from plenty possible processes to reveal and highlight only those, which correspond to the noncollinearity angle and the wavelength of the seeding. This phenomenon potentially can be exploited to control light at the outlet of a nonlinear crystal.

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