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Project Mission
To conduct quantum information related research to:
Provide solutions for advanced quantum information science and technology to enhance US industrial competitiveness.
Develop and exploit new calibration and metrology techniques to achieve standardization in the area of quantum information and communication.
Provide an infrastructure for quantum communication metrology, testing, calibration, and technology development.


         R&D 100 Award(2007)

       ET Finalist Award(2007) 

       DoC Silver (2008) and Bronze
(2005) Medals

      ITL Outstanding Authorship (2007)

Most Resent Publications

Lijun Ma, S Nam, Hai Xu, B Baek, Tiejun Chang, O Slattery, A Mink and Xiao Tang, " 1310 nm differential-phase-shift QKD system using superconducting single-photon detectors ". New Journal of Physics, Vol. 11, April 2009.

Alan Mink, Joshua C Bienfang, Robert Carpenter, Lijun Ma, Barry Hershman, Alessandro Restelli and Xiao Tang, " Programmable instrumentation and gigahertz signaling for single-photon quantum communication systems ". New Journal of Physics, Vol. 11, April 2009.

Lijun Ma, Alan Mink and Xiao Tang, "High Speed Quantum Key Distribution over Optical Fiber Network System ", Journal of Research of the National Institute of Standards and Technology, Vol. 114, Number 3, Page 149, May- June 2009.

A. Mink, S. Frankel, and R. Perlner, " Quantum Key Distribution (QKD) and Commodity Security Protocols: Introduction and Integration ", International Journal of network security and its applications, Vol. 1, No. 2, July 2009.

Lijun Ma, Oliver Slattery, Tiejun Chang and Xiao Tang, " Non-degenerated sequential time-bin entanglement generation using periodically poled KTP waveguide ", Optics Express, Vol. 17 Issue 18, pp.15799-15807 (2009).

Lijun Ma, Oliver Slattery and Xiao Tang, " Experimental study of high sensitivity infrared spectrometer with waveguide-based up-conversion detector ", Optics Express Vol. 17, Issue 16, pp. 14395–14404 (2009).

Xiao Tang, Lijun Ma, Oliver Slattery, “Single photon detection and spectral measurement in near infrared region using up-conversion technology” invited talk, presented at LPHYS09, Barcelona, Spain, July 13-17, 2009.

Lijun Ma, Oliver Slattery, Tiejun Chang and Xiao Tang, “Sequential time-bin entanglement generation using periodically poled KTP waveguide”, CLEO/ IQEC (Optical Society of America, Washington, DC, 2009), JWA85.

Xiao Tang, Lijun Ma, Oliver Slattery, “Single photon detection and spectral measurement in near infrared region using up-conversion technology” invited talk, presented at LPHYS09, Barcelona, Spain, July 13-17, 2009.

Burm Baek, Lijun Ma, Alan Mink, Xiao Tang and Sae Woo Nam, " Detector performance in long-distance quantum key distribution using superconducting nanowire single-photon detectors ", Proc. SPIE, Vol. 7320, 73200D (2009).

Oliver Slattery, Alan Mink, and Xiao Tang, " Low noise up-conversion single photon detector and its applications in quantum information systems ", Proc. of SPIE Vol. 7465, 74650W, 2009.

Oliver Slattery, Lijun Ma and Xiao Tang, " Optimization of photon pair generation in dual-element PPKTP waveguide ", Proc. of SPIE Vol. 7465, 74650K, 2009.

Oliver Slattery, Lijun Ma and Xiao Tang, “High-Speed Coincidence Photon Pair Generation by Dual-Element PPKTP Waveguide over GHz repetition rate”, submitted to Frontier in Optics 2009 (the 93rd annual meeting of Optical Society of American, San Jose, October, 2009). WERB review approved.

All Publications


 Project Phases

Phase I Accomplishment (Architectural Design):

Completed the initial architectural design of the system, including hardware and software components.


Architecture of NIST QuIN testbed 

Phase II Accomplishments (Component Design and Implementation):
A four-channel 1G Ethernet WDM system, and the optical interfaces to telescopes were completed. These classical channels are to be used for sending timing and framing information.


WDM for 125GHz classical system



Optical interface for quantum links


The high-speed electronics for controlling the full system was designed and the circuit boards were fabricated. An FPGA on each board allows for complex parallel logic that is reprogrammable providing a path for revisions and enhancements.



PCI interface high-speed electronics boards for Alice (left) and Bob (right).


Completed the device drivers for the PCI boards which provide access to the hardware. Completed the basic upper layer software for system control and management of secrets (obtaining, maintaining, and using quantum keys), and interactions with applications that need encryption.

Phase III Accomplishments (System Integration and Performance Measurements):

We integrated the NIST custom high-speed electronics, which handles a large portion of the BB84 QKD protocol, to the Quantum devices and optics on the lower layers and to the communications software algorithms, Sifting and Error Reconciliation (Cascade) on the higher layers. Bring this highly experimental system to life required significant tuning and enhancements of all the layers of our testbed. An early indication of our success is the preliminary 1 Mb/s Sifted Key rate we were able to achieve from our initial integrated Testbed trails.


High Speed electronics communication using the QKD protocol stack Optical Network  


Optical Network – Quantum Channels and Classical channels

                           The QKD Protocol Stack 

Phase IV Accomplishments (Enhancements & Fiber Development):

During 2005-2006 we have attained significant performance results with the development of a polarization encoded fiber-based QKD system. Initial performance for a B92 protocol implementation was measured in excess of 1 Mb/s Sifted Key rate, followed by a number enhancements performance was doubled to 2 Mb/s Sifted Key rate and 1 Mb/s Privacy Amplified secure key. After upgrading the system to conduct the BB84 protocol, performance was measured in excess of 4 Mb/s Sifted Key rate with an error rate of 3.6% over 1km of fiber. The technical details are described in the publication "Experimental Study of High Speed Polarization-Coding Quantum Key Distribution with Sifted-Key Rates Over Mbit/s," Optics Express, Vol. 14, No. 6, p.2062 (2006).

Furthermore, as part of its open testbed function, super conducting single photon detectors developed in NIST's EEEL were installed in place of the original silicon detectors and measured performance showed these detectors had very low jitter allowing high time resolution.


Fiber-based Quantum Key Distribution System 

The figure above shows the configuration of the system. It uses two telecom fibers. One is the quantum channel for transmitting 850 nm photons with a mean photon number of 0.1. The other is the classical channel transmitting bi-directionally at 1510 and 1590 nm. Four silicon-based single photon detectors are used in the system. The NIST custom high-speed electronic printed circuit board handles the quantum and classical channels and the sifting protocol. The NIST reconciliation and privacy amplification protocols are currently implemented in software.


                 Sifted Key Rate vs. Distance


                 Data Rate vs. Error Rate 

The system generates 4 Mbit/s of sifted key over 1km of fiber, and 1 Mbit/s over 4km. From calculation it should be able to generate sifted key at 0.1 Mbit/s over 8 km of fiber.


The next generation of high-speed electronics will provide faster QKD operation by using higher frequencies and incorporating reconciliation and privacy amplification in hardware.

As an example of an application for our high speed QKD system, we are constructing a video surveillance network with three nodes, (one Alice & two Bobs). Alice can alternatively view QKD secured real-time video signals from either the cameras at Bob1 or at Bob2, which are at two different locations.


The NIST secure QKD video surveillance application encrypts, transmits and decrypts web quality video continuously over the internet using a continuously generated real-time QKD secure key.