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Author |
Kern, Pierre; Le Coärer, Etienne; Benech, Pierre |
Title |
On-chip spectro-detection for fully integrated coherent beam combiners |
Type |
Journal Article |
Year |
2009 |
Publication |
Optics Express |
Abbreviated Journal |
Opt.Express |
Volume |
17 |
Issue |
3 |
Pages |
1976-1987 |
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Abstract |
This paper presents how photonics associated with new arising detection technologies is able to provide fully integrated instrument for coherent beam combination applied to astrophysical interferometry. The feasibility and operation of on-chip coherent beam combiners has been already demonstrated using various interferometric combination schemes. More recently we proposed a new detection principle aimed at directly sampling and extracting the spectral information of an input signal together with its flux level measurement. The so-called SWIFTS demonstrated concept that stands for Stationary-Wave Integrated Fourier Transform Spectrometer, provides full spectral and spatial information recorded simultaneously thanks to a motionless detecting device. Due to some newly available detection principles considered for the implementation of the SWIFTS concept, some technologies can even provide photo-counting operation that brought a significant extension of the interferometry domain of investigation in astrophysics. The proposed concept is applicable to most of the interferometric instrumental modes including fringe tracking, fast and sensitive detection, Fourier spectral reconstruction and also to manage a large number of incoming beams. The paper presents three practical implementations, two dealing with pair-wise integrated optics beam combinations and the third one with an all-in-one 8 beam combination. In all cases the principles turned into a pair wise baseline coding after proper data processing. |
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RPLAB @ gujma @ |
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650 |
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Anant, Vikas; Kerman, Andrew J.; Dauler, Eric A.; Yang, Joel K. W.; Rosfjord, Krist.ine M.; Berggren, Karl K. |
Title |
Optical properties of superconducting nanowire single-photon detectors |
Type |
Journal Article |
Year |
2008 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
Volume |
16 |
Issue |
14 |
Pages |
10750 |
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1094-4087 |
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RPLAB @ s @ |
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413 |
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Author |
Lee, Ju-Hyun; Kim, Dong-Woo; Wu, Yung-Hsun; Yu, Chang-Jae; Lee, Sin-Doo; Wu, Shin-Tson |
Title |
High-speed infrared phase modulators using short helical pitch ferroelectric liquid crystals |
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Journal Article |
Year |
2005 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
Volume |
13 |
Issue |
20 |
Pages |
7732 |
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IR modulator |
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1094-4087 |
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541 |
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Stucki, Damien; Barreiro, Claudio; Fasel, Sylvain; Gautier, Jean-Daniel; Gay, Olivier; Gisin, Nicolas; Thew, Rob; Thoma, Yann; Trinkler, Patrick; Vannel, Fabien; Zbinden, Hugo |
Title |
Continuous high speed coherent one-way quantum key distribution |
Type |
Journal Article |
Year |
2009 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
Volume |
17 |
Issue |
16 |
Pages |
13326-13334 |
Keywords |
quantum cryptography, QKD, PNS, SSPD, coherent one way, COW |
Abstract |
Quantum key distribution (QKD) is the first commercial quantum technology operating at the level of single quanta and is a leading light for quantum-enabled photonic technologies. However, controlling these quantum optical systems in real world environments presents significant challenges. For the first time, we have brought together three key concepts for future QKD systems: a simple high-speed protocol; high performance detection; and integration both, at the component level and for standard fibre network connectivity. The QKD system is capable of continuous and autonomous operation, generating secret keys in real time. Laboratory and field tests were performed and comparisons made with robust InGaAs avalanche photodiodes and superconducting detectors. We report the first real world implementation of a fully functional QKD system over a 43dB-loss (150km) transmission line in the Swisscom fibre optic network where we obtained average real-time distribution rates over 3 hours of 2.5bps. |
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RPLAB @ akorneev @ |
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602 |
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Author |
Miller, Aaron J.; Lita, Adriana E.; Calkins, Brice; Vayshenker, Igor; Gruber, Steven M.; Nam, Sae Woo |
Title |
Compact cryogenic self-aligning fiber-to-detector coupling with losses below one percent |
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Journal Article |
Year |
2011 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
Volume |
19 |
Issue |
10 |
Pages |
9102-9110 |
Keywords |
TES |
Abstract |
We present a compact packaging technique for coupling light from a single-mode telecommunication fiber to cryogenic single-photon sensitive devices. Our single-photon detectors are superconducting transition-edge sensors (TESs) with a collection area only a factor of a few larger than the area of the fiber core which presents significant challenges to low-loss fiber-to-detector coupling. The coupling method presented here has low loss, cryogenic compatibility, easy and reproducible assembly and low component cost. The system efficiency of the packaged single-photon counting detectors is verified by the “triplet method†of power-source calibration along with the “multiple attenuator†method that produces a calibrated single-photon flux. These calibration techniques, when used in combination with through-wafer imaging and fiber back-reflection measurements, give us confidence that we have achieved coupling losses below 1 % for all devices packaged according to the self-alignment method presented in this paper. |
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RPLAB @ gujma @ |
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666 |
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