All-optical delay technique for supporting multiple antennas in a hybrid optical - wireless transmission system

We introduce a novel continuously-variable optical delay technique to support beam-forming wireless communications systems using antenna arrays. We demonstrate delay with 64-QAM modulated signals at a rate of 15 Msymbol/sec with 2.5 GHz carrier frequency

Fabry-perot Laser-based Optical Switch For Multicast Transmission In Bidirectional Optical Access Networks

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Optical multicasting based on multiwavelength injection locking of a Fabry-Perot laser diode is proposed as a viable solution to implement real-time optical switching in WDM optical networks, reducing the impact of Rayleigh backscattering induced crosstalk in bidirectional transmission, and allowing full wavelength reuse. Efficient low-power optical injection for full duplex transmission at 1.25 Gb/s over 25 km of SMF is demonstrated. (c) 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1466-1469, 20165814661469CNPq [401315/2012-6]FAPESP [PadTec/PITE2 2007-56024-4]INCT-FOTONICOMConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Fabry-perot Injection Locking Based Optical Multicasting For Reach Extension Of Access Networks

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)We propose and numerically characterize a novel reach extender (RE) for optical access networks based on injection locking of a conventional Fabry-Perot (FP) laser. The proposed RE allows to regenerate a modulated downstream (DS) signal after fiber propagation and simultaneously transfer the DS modulation to adjacent CW channels. The performance of the proposed architecture is shown at data rates of 2.5 and 5 Gb/s with good effectiveness. © 2013 IEEE.Microwave Theory and Techniques Society (IEEE MTT-S),Sociedade Brasileira de Micro-Ondas e Optoeletrenica (SBMO),CNPq,CAPES,FAPERJConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Kim, K., Lee, J., Lee, S., Jang, Y., 2.5 gbps hybrid pon link using rsoa based wdm-pon and a reach extender (2011) Journal of Korea Information and Communications Society, 36 B (6), pp. 583-591Kang, B., Chul, K.H., An amplified wdm-pon using broadband light source seeded optical sources and a novel bidirectional reach extender (2011) Journal of Opt.Society of Korea, 15 (3), pp. 222-226Nesset, D., Farrow, K., Wright, P., Menashe, D., (2012) Raman Amplifier Module for GPON Reach Extension, , OFC/NFOEC 2012, Los Angeles, CA, USA, paper NTu1J.3Horer, J., Patzak, E., Large-signal analysis of all-optical wavelength conversion using two-mode injection locking in semiconductor lasers (1997) Journal of Quant.Electr., 33 (4), pp. 596-608Chow, C.W., Wong, C.S., Tsang, H.K., 8x10 gb/s multi-wavelength injection locking of a fp laser diode for wdm multicast (2003) LEOS 2003, 2, pp. 682-68

8b10b line coding of PSK signals for effective homodyne coherent detection

We demonstrate effective homodyne optical phase locking to a phase-shift-keying (PSK) signal with residual carrier by exploiting 8b10b coding. Low-penalty transmission over 215 km of installed dispersion-compensated single-mode fibre is demonstrated

Effective homodyne optical phase locking to PSK signal by means of 8b10b line coding

We demonstrate a novel technique that allows effective homodyne optical phase locking to a phase shift keying (PSK) signal with a residual carrier. We exploit 8b10b coding of the signal in order to reduce its low frequency spectral content, suppressing the data-to-phase crosstalk effect. In a transmission experiment on a 10 Gb/s binary PSK signal (8 Gb/s before coding), we achieved transmission over 215 km of dispersion-compensated, installed single-mode fibre, with no penalty compared to back-to-back at a bit error ratio of 10(-3). The proposed solution is applicable to other modulation formats, including multi-level amplitude and/or phase modulation formats

Analysis of PMD induced crosstalk in 2x40 Gbit/s Polarization Multiplexed signals

We theoretically and experimentally investigate the PMD tolerance of Intensity-Modulated Polarization Multiplexed signals, both NRZ and RZ. Clock alignment and pulsewidth can be optimised to reduce the impairments

Carrier class availability in a transparent 1.25 Gb/s free space optical communication link over 320 m

We realized and monitored over 72 hours a 1.25 Gbit/s FSO link, 320 m long, using novel transparent terminals. For the first time, we obtained 99.9992% availability and derived a statistical analysis of BER and scintillation index