Seaworthy Quantum Key Distribution Design and Validation (SEAKEY)
Technical Report,23 Feb 2016,26 May 2016
RAYTHEON BBN TECHNOLOGIES CAMBRIDGE MA CAMBRIDGE United States
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In this report we summarize the technical progress accomplished during the first quarter of the third year of the SeaKey program. In this quarter we continued work along the experimental portion of the SeaKey program. The work we have done this quarter continues to evaluate the performance of our homodyne receiver built for decoding phase encoded coherent states. Evaluation by our theorists of the data taken to date has identified excess noise in our receiver, which we spent most of this quarter diagnosing, tracking down and remedying. The progress presented here shows our techniques and efforts to identify and quantify the noise, which we have determined to come from our laser sources. Finally, we present our path forward in achieving shot noise limited performance for the homodyne receiver, which includes the stable CW local oscillator and balanced detector.
- Non-Radio Communications
- Lasers and Masers