Operation of Josephson Junctions With Current Pulses Generated by Triggering a Cold Photo Detector With an Optical Comb

Urano, Chiharu; Kaneko, Nobu‐Hisa; Maezawa, M.; Gorwadkar, Sucheta; Itatani, Taro; Saitou, H.; Maeda, J.; Kiryu, Shogo

doi:10.1109/tasc.2007.897391

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, no degradation of performance was found when cooled [36]. A commercial InGaAs MSM photodiode with an electrode gap width of 5 mm was demonstrated to drive JJA with 100 JJAs in series with a pulse repetition frequency of 50 MHz and pulse width of 100 fs [3]. A pulse width of 80 ps of the generated waveform was estimated inside the cryostat, indicating a 6.3 GHz operation possibility for the pulse trains.…”

Section: B Optically Controlled Superconducting Electronicsmentioning

confidence: 97%

“…In addition, thermal fluctuations are suppressed, changing the characteristics and performance of many well-known devices. In practice, the superconducting state is achieved by cooling the devices to temperatures below 10 K, such as in a cryostat cooled by liquid helium to 4.2 K (e.g., [3]) or in cryogen-free coolers (e.g., [4]).…”

Section: Cryogenic Optoelectronic Devicesmentioning

confidence: 99%

“…Coupling losses in an SNSPD integrated circuit occurred at the grating coupler from a fiber to a 750 nm 3 110 nm waveguide [20].…”

Section: Optics and Optical Couplingmentioning

confidence: 99%

See 2 more Smart Citations

Review of Devices, Packaging, and Materials for Cryogenic Optoelectronics

Bardalen¹,

Akram²,

Malmbekk³

et al. 2015

Journal of Microelectronics and Electronic Packaging

View full text Add to dashboard Cite

In this article, developments and techniques related to optical-fiber-coupled devices operating at cryogenic temperatures are reviewed. These devices include superconducting electronics and photodetectors. Superconducting circuits have a number of suitable characteristics in terms of speed and efficiency, lower power consumption, and traceability to fundamental quantum properties. Thus, applications are found in a number of technologies, such as communication and metrology. Often, the devices are coupled by an optical fiber link to an external source. A suitable design of the optical coupling at cryogenic temperatures entails considerations of electromagnetic behavior, geometry, components, material choices, and customized packaging schemes. Minimizing thermomechanical stresses and deformation is a challenge due to the extreme temperature span, from room temperature to below 10 K. Due to the thermomechanical properties at low temperatures, with high contraction and brittleness of some materials, careful design and testing is dictated for the method of mechanical attachment and alignment techniques to avoid failure. Solutions for the efficient, robust optical coupling remain a challenge for some of these devices.

show abstract

Section: B Optically Controlled Superconducting Electronicsmentioning

confidence: 97%

Section: Cryogenic Optoelectronic Devicesmentioning

confidence: 99%

See 1 more Smart Citation

Review of Devices, Packaging, and Materials for Cryogenic Optoelectronics

Bardalen¹,

Akram²,

Malmbekk³

et al. 2015

Journal of Microelectronics and Electronic Packaging

View full text Add to dashboard Cite

show abstract

“…The NMIJ/AIST has worked on both SINIS-and SNSbased PD-JVSs. [18][19][20][21] The Josephson junction arrays of the SINIS were fabricated with a conventional Nb-Al technology and the SNS JJAs were basically fabricated with the same method as that for the PJVS.…”

Section: Pulse-driven Josephson Voltage Standardmentioning

confidence: 99%

Review of Josephson Waveform Synthesis and Possibility of New Operation Method by Multibit Delta–Sigma Modulation and Thermometer Code for Its Further Advancement

Kaneko

Maruyama

Urano

et al. 2011

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

A method of AC waveform synthesis with quantum–mechanical accuracy has been developed on the basis of the Josephson effect in national metrology institutes, not only for its scientific interest but its potential benefit to industries. In this paper, we review the development of Josephson arbitrary waveform synthesizers based on the two types of Josephson junction array and their distinctive driving methods. We also discuss a new operation technique with multibit delta–sigma modulation and a thermometer code, which possibly enables the generation of glitch-free waveforms with high voltage levels. A Josephson junction array for this method has equally weighted branches that are operated by thermometer-coded bias current sources with multibit delta–sigma conversion.

show abstract

“…Therefore, it is often called Josephson Arbitrary Waveform Synthesizer (JAWS). At present, three national metrology institutes develop and fabricate the required Josephson junction series arrays: NIST, AIST and PTB [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Cryocooler Operation of a Pulse-Driven AC Josephson Voltage Standard at PTB

Kieler¹,

Scheller²,

Kohlmann³

2013

WJCMP

View full text Add to dashboard Cite

The PTB Josephson Arbitrary Waveform Synthesizer (JAWS) enables the generation of arbitrary waveforms up to voltages of 70 mV RMS (199 mV PP ) using two Josephson arrays in series containing 4000 Josephson junctions each. The SNS-like double-stacked junctions are based on Nb x Si 1−x as barrier material. While the JAWS system is typically operated using a Dewar with liquid helium, the operation in a closed-cycle pulse-tube cryocooler at temperatures around 4.2 K range was here investigated and successfully demonstrated. For this purpose a special designed cryoprobe was used to provide high quality pulses to the Josephson arrays.

show abstract

Operation of Josephson Junctions With Current Pulses Generated by Triggering a Cold Photo Detector With an Optical Comb

Cited by 8 publications

References 12 publications

Review of Devices, Packaging, and Materials for Cryogenic Optoelectronics

Review of Devices, Packaging, and Materials for Cryogenic Optoelectronics

Review of Josephson Waveform Synthesis and Possibility of New Operation Method by Multibit Delta–Sigma Modulation and Thermometer Code for Its Further Advancement

Cryocooler Operation of a Pulse-Driven AC Josephson Voltage Standard at PTB

Contact Info

Product

Resources

About