162,470 research outputs found
Conditional frequency-domain beamsplitters using phase modulators
No full textWe propose and explore the families of fully tunable, conditional 2 x 2 frequency-domain beamsplitters that result from sideband coupling in phase modulators. Full tunability is obtained by tailoring the driving voltage feeding the modulators, in a design based on the symmetries of this voltage waveform. The most favorable case in terms of success probability is that of first-sideband coupling, which can be implemented by the use of single-tone phase modulation. The use of this device is illustrated by means of several examples based on the use of a wavelength-routed source of pairs of single-photon frequency-entangled states, showing immediate applications as a means of translating to the frequency-domain quantum-processing protocols based on linear optics.Manuscript received August 31, 2011; revised September 21, 2011; accepted September 22, 2011. Date of publication September 29, 2011; date of current version October 21, 2011. This paper was supported by the Ministerio de Ciencia y Tecnologia, Spain, through Project TEC2008-02606 and through Quantum Optical Information Technology (QOIT): a CONSOLIDER-INGENIO 2010 Project. It is also supported by the Generalitat Valenciana through the PROMETEO 2008/092 research excellency award. Corresponding author: J. Capmany (e-mail: [email protected]).Capmany Francoy, J.; Fernández-Pousa, CR. (2011). Conditional frequency-domain beamsplitters using phase modulators. IEEE Photonics Journal. 3(5):954-967. https://doi.org/10.1109/JPHOT.2011.2170158S9549673
A novel highly selective and tunable optical bandpass filter using a fibre grating and a fibre Fabry-Perot
No full textWe present a novel continuously tunable optical bandpass filter composed of a FFP, on an optical circulator, and a fiber grating. The structure combines the high selectivity of the FFT and the bandpass nature of the fiber grating
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Multi-purpose programmable optical chips
No full textPérez-López, D.; Gasulla Mestre, I.; Capmany Francoy, J. (2017). Multi-purpose programmable optical chips. Optical Society of America (OSA). 1-3. https://doi.org/10.1364/SPPCOM.2017.SpW3F.1S13Willner, A. E., Khaleghi, S., Chitgarha, M. R., & Yilmaz, O. F. (2014). All-Optical Signal Processing. Journal of Lightwave Technology, 32(4), 660-680. doi:10.1109/jlt.2013.2287219Liu, W., Li, M., Guzzon, R. S., Norberg, E. J., Parker, J. S., Lu, M., … Yao, J. (2016). A fully reconfigurable photonic integrated signal processor. Nature Photonics, 10(3), 190-195. doi:10.1038/nphoton.2015.281Capmany, J., Gasulla, I., & Pérez, D. (2015). The programmable processor. Nature Photonics, 10(1), 6-8. doi:10.1038/nphoton.2015.254Zhuang, L., Roeloffzen, C. G. H., Hoekman, M., Boller, K.-J., & Lowery, A. J. (2015). Programmable photonic signal processor chip for radiofrequency applications. Optica, 2(10), 854. doi:10.1364/optica.2.000854Pérez, D., Gasulla, I., Capmany, J., & Soref, R. A. (2016). Reconfigurable lattice mesh designs for programmable photonic processors. Optics Express, 24(11), 12093. doi:10.1364/oe.24.012093Reck, M., Zeilinger, A., Bernstein, H. J., & Bertani, P. (1994). Experimental realization of any discrete unitary operator. Physical Review Letters, 73(1), 58-61. doi:10.1103/physrevlett.73.58Clements, W. R., Humphreys, P. C., Metcalf, B. J., Kolthammer, W. S., & Walsmley, I. A. (2016). Optimal design for universal multiport interferometers. Optica, 3(12), 1460. doi:10.1364/optica.3.00146
WDM grid tunable filter based on a sampled fibre grating and a FFP
No full textWe propose and report on a novel device based on the cascade of a sampled fibre grating and a fibre Fabry-Perot. The operation and experimental demonstration of the combined structure are presented showing stability and tunability advantages for filtering and channel routing applications in WDM telecommunication systems using normalised frequency grids, such as that proposed by the ITU
Full characterization of long periodic superstructure fibre Bragg gratings in multichannel devices
No full textThe characterization of the amplitude and delay response of superstructure fiber Bragg gratings was discussed. The periodic superstructure fiber Bragg gratings are characterized by a periodic variation of the grating parameters resulting in a multiband spectra response arising from every Fourier component of the superstructure. The modeling of the superstructure using the coupling-mode theory and the Runge-Kutta method for solving Riccati equations is discussed
Experimental demonstration of an ultraselective and tunable optical bandpass filter using a fibre grating and a Fabry-Perot
No full textThe authors report on the use of a structure composed of a fibre Fabry-Perot and a fibre grating as an ultraselective and tunable optical bandpass filter. The first experimental demonstration of the filter operation is presented and a range of tuning of several hundreds of gigahertz can be achieved by using the presented techniques
The programmable processor
No full text[EN] Reconfigurable optical chips made from 2D meshes of connected waveguides could pave the way for programmable, general purpose microwave photonics processors.Capmany Francoy, J.; Gasulla Mestre, I.; Pérez-López, D. (2016). The programmable processor. Nature Photonics. 10:6-8. doi:10.1038/nphoton.2015.254S6810Waterhouse, R. & Novak, D. IEEE Microwave Mag. 16, 84–92 (2015).Skubic, B., Bottari, G., Rostami, A., Cavaliere, F. & Ölen, P. IEEE J. Lightwave Technol. 33, 1084–1091 (2015).Nature Photonics Technology Focus http://www.nature.com/nphoton/journal/v5/n12/techfocus/index.html (2011).Marpaung, D. et al. Lasers Phot. Rev. 7, 506–538 (2013).Pérez, D., Gasulla, I. & Capmany, J. Opt. Express 23, 14640–14654 (2015).Zhuang, L. et al. Optica 2, 854–859 (2015).Smit, M. et al. Semicond. Sci. Technol. 28, 083001 (2014).Guan, B. B. et al. IEEE J. Sel. Top. Quantum Electron. 20, 359–368 (2014).Wang, J. et al. Nature Commun. 6, 5957 (2015).Miller, D. A. B. Optica 2, 747–750 (2015)
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