FPGA-based gating and logic for multichannel single photon counting

Pooser, Raphael C.; Earl, Duncan; Evans, Philip G.; Williams, Brian P.; Schaake, Jason; Humble, Travis S.

doi:10.1080/09500340.2012.706325

Cited by 16 publications

(13 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results are presented in Section 5 and indicate that the width of the coincidence window is Tc as small as Tc ≈ 115 ps, which is at least about ten times smaller (more precise) than reported by other research [4][5][6][7]. Finally, Section 6 concludes this paper with a brief discussion.…”

Section: Open Accessmentioning

confidence: 87%

“…First of all, the length of the event pulses is critical with respect to the length of the coincidence window. Some research [7] utilized event detectors that provide output pulses of 30 ns. The pulses' lengths directly determine the coincidence window Tc.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, the signal propagation delays inside the FPGA-internal structures were exploited. Pooser et al [7] refer to a pulse shaping approach that includes a digital latch that samples the incoming event pulse. Thus, the coincidence window is limited by the applied clock frequency, which was as high as 400 MHz, resulting in a coincidence window of 2.5 ns.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CDL, a Precise, Low-Cost Coincidence Detector Latch

Joost

Salomon

2015

Electronics

View full text Add to dashboard Cite

Abstract:The electronic detection of the coincidence of two events is still a key ingredient for high-performance applications, such as Positron Emission Tomography and Quantum Optics. Such applications are demanding, since the precision of their calculations and thus their conclusions directly depend on the duration of the interval in which two events are considered coincidental. This paper proposes a new circuitry, called coincidence detector latch (CDL), which is derived from standard RS latches. The CDL has the following advantages: low complexity, fully synthesizable, and high scalability. Even in its simple implementation, it achieves a coincidence window width as short as 115 ps, which is more than 10 times better than that reported by recent research.

show abstract

Section: Open Accessmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CDL, a Precise, Low-Cost Coincidence Detector Latch

Joost

Salomon

2015

Electronics

View full text Add to dashboard Cite

show abstract

“…An emerging trend in the single photon detection and correlation measurement is the use of field programmable gate arrays (FPGAs) [147] . FPGAs are programmable logic chips;…”

Section: Detection and Coincidence Counting Electronicsmentioning

confidence: 99%

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

Francis-Jones

2017

Springer Theses

View full text Add to dashboard Cite

In recent years, there has been rapid development in processing of quantum information using quantum states of light. The focus is now turning towards developing real-world implementations of technologies such as all-optical quantum computing and cryptography. The ability to consistently create and control the required single photon states of light is crucial for successful operation. Therefore, high performance single photon sources are very much in demand.The most common approach of generating the required nonclassical states of light is through spontaneous photon pair generation in a nonlinear medium. One photon in the pair is detected to "herald" the presence of the remaining single photon. For many applications the photons are required to be in pure indistinguishable states. However, photon pairs generated in this manner typically suffer from spectral correlations, which can lead to the production of mixed, distinguishable states. Additionally, these sources are probabilistic in nature, which fundamentally limits the number of photons that can be delivered simultaneously by independent sources and hence the scalability of these future technologies.One route to deterministic operation is by actively multiplexing several independent sources together to increase the probability of delivering a single photon from the system. This thesis presents the development and analysis of a multiplexing scheme of heralded single photons in high-purity indistinguishable states within an integrated optical fibre system. The spectral correlations present between the two photons in the pair were minimised by spectrally engineering each photonic crystal fibre source. A novel, in-fibre, broadband filtering scheme was implemented using photonic bandgap fibres. In total, two sources were multiplexed using a fast optical switch, yielding an 86% increase in the heralded count rate from the system. AcknowledgementsI would first like to express my gratitude to my supervisor Dr. Peter Mosley, for giving me the opportunity to work with him on an exciting and interesting project, and for first introducing me to the world of quantum optics in the final year of my undergraduate degree. Without his support and guidance over the last three years, this thesis and the work that it contains would not have been possible. It has been a tremendously enjoyable learning experience (for both of us I hope!), and I think I can safely say that I now know more about FPGAs than I ever thought or hoped I would! I am incredibly grateful for the opportunity, and eagerly look forward to continue working with you on the upcoming NQIT project.Secondly, I would like to thank all of the staff and students, past and present, of the Centre for Photonics and Photonic Materials for providing an enjoyable, interesting and supportive learning environment. I would particularly like to thank James, for casting his eye over my fibre designs, passing down his fabrication knowledge, and teaching me the dark art of the dispersion rig! I would also especially like to ...

show abstract

“…The impact of Raman noise can be mitigated to some extent by using dispersion-engineering to place the idler photons beyond the majority of the Raman gain [9][10][11] or by cooling the fibre cryogenically [12]. In addition, correlation between the signal and idler modes can be used to gate desired events, either electronically through post-selecting coincident detection signals [13], or optically by feed-forward from the heralding detection to a fast optical switch [14]. The latter is more desirable as it reduces, rather than masks, the flux of unwanted photons delivered at the output of the source -important for measurements that are limited by total photon budget [15,16].…”

Section: Introductionmentioning

confidence: 99%

Fibre-integrated noise gating of high-purity heralded single photons

Francis-Jones

Mosley

2017

J. Opt.

View full text Add to dashboard Cite

We present an all-fibre source of high-purity heralded single photons with an integrated conditional optical gate that reduces uncorrelated noise by almost an order of magnitude. Generating photon pairs by four-wave mixing in photonic crystal fibre, we observe with the noise gate active a factor of 7 reduction in the rate of single counts in the heralded channel with no measurable drop in coincidence count rate. In contrast to electronic post-selection of coincidence events, the real reduction in the flux of unwanted photons is beneficial for example to avoid bleaching light-sensitive samples or in generating entangled states.

show abstract

FPGA-based gating and logic for multichannel single photon counting

Cited by 16 publications

References 20 publications

CDL, a Precise, Low-Cost Coincidence Detector Latch

CDL, a Precise, Low-Cost Coincidence Detector Latch

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

Fibre-integrated noise gating of high-purity heralded single photons

Contact Info

Product

Resources

About