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Author  |
Churikov, Victor M.; Kopp, Victor I.; Genack, Azriel Z. |
| Title |
Chiral diffraction gratings in twisted microstructured fibers |
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Journal Article |
| Year |
2010 |
Publication |
Optics Letters |
Abbreviated Journal |
Opt. Lett. |
| Volume |
35 |
Issue |
3 |
Pages |
342-344 |
| Keywords |
chiral diffracion gratings, optical fiber gratings, from chiralphotonics |
| Abstract |
We observed dips in transmission spectra of uniformly twisted pure-silica microstructured fibers. The spectral positions of the dips and their insensitivity to the surrounding medium are consistent with Bragg diffraction from the helical structure. The reproducibility of the variation of the dip wavelength with temperature up to 1000°C makes the chiral diffraction grating suitable for high-temperature sensing. |
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Hu, Xiaolong; Zhong, Tian; White, James E.; Dauler, Eric A. Najafi, Faraz; Herder, Charles H.; Wong, Franco N. C.; Berggren, Karl K. |
| Title |
Fiber-coupled nanowire photon counter at 1550 nm with 24% system detection efficiency |
Type |
Journal Article |
| Year |
2009 |
Publication |
Optics Letters |
Abbreviated Journal |
Opt. Lett. |
| Volume |
34 |
Issue |
23 |
Pages |
3607-3609 |
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SNSPD |
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We developed a fiber-coupled superconducting nanowire single-photon detector system in a close-cycled cryocooler and achieved 24% and 22% system detection efficiencies at wavelengths of 1550 and 1315 nm, respectively. The maximum dark count rate was ~1000 counts/s. |
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RPLAB @ gujma @ |
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679 |
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Khosropanah P.; Baryshev A.; Zhang W.; Jellema W.; Hovenier J.N.; Gao G.R.; Klapwijk T.M; Paveliev D.G.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L.; Klein B.; Hesler J.L. |
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Phase-locking of a 2.7-THz quantum cascade laser to a microwave reference |
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Journal Article |
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2009 |
Publication |
Optics Letters |
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34 |
Issue |
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Pages |
2958-2960 |
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We demonstrate the phase locking of a 2.7 THz metal–metal waveguide quantum cascade laser (QCL) to an external microwave signal. The reference is the 15th harmonic, generated by a semiconductor superlattice nonlinear device, of a signal at 182 GHz, which itself is generated by a multiplier chain (X12) from a
microwave synthesizer at ~ 15 GHz. Both laser and reference radiations are coupled into a bolometer mixer, resulting in a beat signal, which is fed into a phase-lock loop. The spectral analysis of the beat signal con-firms that the QCL is phase locked. This result opens the possibility to extend heterodyne interferometers into the far-infrared range. |
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RPLAB @ atomics90 @ |
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966 |
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Pruessner, Marcel W.; Stievater, Todd H.; Rabinovich, William S. |
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Integrated waveguide Fabry-Perot microcavities with silicon/air Bragg mirrors |
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Journal Article |
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2007 |
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Optics Letters |
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Opt. Lett. |
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32 |
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5 |
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533 |
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0146-9592 |
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484 |
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Zhong, Tian; Hu, Xiaolong; Wong, Franco N. C.; Berggren, Karl K.; Roberts, Tony D.; Battle, Philip |
| Title |
High-quality fiber-optic polarization entanglement distribution at 1.3 μm telecom wavelength |
Type |
Journal Article |
| Year |
2010 |
Publication |
Optics Letters |
Abbreviated Journal |
Opt. Lett. |
| Volume |
35 |
Issue |
9 |
Pages |
1392-1394 |
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We demonstrate high-quality distribution of 1.3 μm polarization-entangled photons generated from a fiber-coupled periodically poled KTiOPO4 waveguide over 200 m fiber-optic cables. Time-multiplexed measurements with a 19% efficient superconducting nanowire single-photon detector at the remote location show a detected flux of 5.8 pairs / s at a pump power of 25 μW and an average two-photon quantum-interference visibility of 97.7% without subtraction of accidentals. |
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RPLAB @ gujma @ |
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686 |
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