Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ali Emsia"'
Publikováno v:
IEEE Photonics Technology Letters. 28:343-346
An ultra-wideband (UWB) doublet pulse generation technique in the optical domain for UWB-over-fiber systems is presented. Our solution is based on the direct modulation of a semiconductor laser, optical filtering, and chromatic dispersion in a transm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9468a1a021cedf8dea3e74a5268d9cce
https://doi.org/10.1109/lpt.2015.2496215
https://doi.org/10.1109/lpt.2015.2496215
Autor:
Ali Emsia, Mohammadreza Malekizandi, Ivan B. Djordjevic, Franko Küppers, Dieter Briggmann, Quang Trung Le
Publikováno v:
IEEE Photonics Journal. 6:1-10
Today, even in access networks, data traffic is enormously increasing, a trend that causes existing passive optical network (PON) infrastructures to become bottlenecks in a tele- and data-communication infrastructure, which is aimed to be both broadb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34f4bf82c6d455409c739c23dc9261b0
https://doi.org/10.1109/jphot.2014.2314108
https://doi.org/10.1109/jphot.2014.2314108
Publikováno v:
2015 IEEE Photonics Conference (IPC).
A new, simple, and cost efficient method is experimentally demonstrated to generate 6th order Gaussian derivative optically. Proposed technique is based on directly modulated semiconductor laser, optical filtering and chromatic dispersion of fiber tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7915f3699c087f6f2d30a7b866e3db94
https://doi.org/10.1109/ipcon.2015.7323638
https://doi.org/10.1109/ipcon.2015.7323638
Autor:
Julijan Cesar, Franko Küppers, Christian Gierl, Sascha Preu, Ali Emsia, Mohammad Tanvir Haidar, Sujoy Paul
Publikováno v:
Optics letters. 40(19)
We report frequency-tunable terahertz (THz) generation with a photomixer driven by an ultra-broadband tunable micro-electro-mechanical system vertical-cavity surface-emitting laser (MEMS-VCSEL) and a fixed-wavelength VCSEL, as well as a tunable MEMS-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72b867103f983110a8ffee1eb541fa9b
https://pubmed.ncbi.nlm.nih.gov/26421548
https://pubmed.ncbi.nlm.nih.gov/26421548
Publikováno v:
2015 IEEE Optical Interconnects Conference (OI).
Optical UWB pulse generation and wireless propagation through antenna is investigated. Experimental BER results are presented. It is shown due to antenna characteristics monocycle pulse is converted into 3rd-order Gaussian derivative after wireless p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9350e8d5f51ac5932d42bc6cf3a6b024
https://doi.org/10.1109/oic.2015.7115707
https://doi.org/10.1109/oic.2015.7115707
Publikováno v:
Scopus-Elsevier
This paper proposes a budget extender which is at the same time burst power equalizer based on SOAs for upstream 10 Gbit/s PON that achieves 38 dB access budget and 16 dB dynamic range compression.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28bf1dd6833f3bf3592ba2cc2acf435d
https://doi.org/10.1364/acpc.2014.ath1h.2
https://doi.org/10.1364/acpc.2014.ath1h.2
Autor:
Dieter Briggmann, Ali Emsia, Quang Trung Le, Franko Küppers, Mohammadreza Malekizandi, Ivan B. Djordjevic
Publikováno v:
SPIE Proceedings.
This paper experimentally investigates power budget extension configurations for WDM NG-PONs. Differential Phase Shift Keying (DPSK), and Differential Quadrature Phase Shift Keying (DQPSK) are considered. The budget enhancement techniques are based o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16c2d9ba9a35a258e0f6c6dcd03e1bc8
https://doi.org/10.1117/12.2040133
https://doi.org/10.1117/12.2040133
Autor:
Ali Emsia, Franko Küppers, Ivan B. Djordjevic, Mohammadreza Malekizandi, Dieter Briggmann, Quang Trung Le
Publikováno v:
SPIE Proceedings.
As demand for higher bandwidth is drastically increasing, bandwidth efficiency is going to be an issue in Passive Optical Networks (PONs). Moreover, network operators plan to reduce the number of central offices (COs) while extending the reach of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a73deacb03e6fdca26f8561d52cc0e1e
https://doi.org/10.1117/12.2038524
https://doi.org/10.1117/12.2038524
Publikováno v:
2013 IEEE Photonics Conference.
In this paper we demonstrate different techniques for 1 Tb/s QPSK-WDM-OFDM-PON optical power budget extension. Our simulation results show that EDFA outperforms SOA and yields more access budget. We present our simulation results for 64 customers wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cbe2b8ce7d72eab3dce3e25c6654285
https://doi.org/10.1109/ipcon.2013.6656670
https://doi.org/10.1109/ipcon.2013.6656670
Publikováno v:
SPIE Proceedings.
Chirp-managed lasers (CML) are demonstrated as simple low-cost transmitter with high tolerance to chromatic dispersion. This manuscript proposes the use of CML as cost-effective downstream (DS) transmitters for next generation access networks. The la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4740b7671a8428850ac009e91a5f69f9
https://doi.org/10.1117/12.2001502
https://doi.org/10.1117/12.2001502