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Author

M. Chacinski

Other affiliations: TE Connectivity
Bio: M. Chacinski is an academic researcher from Royal Institute of Technology. The author has contributed to research in topics: Semiconductor laser theory & Laser. The author has an hindex of 12, co-authored 40 publications receiving 403 citations. Previous affiliations of M. Chacinski include TE Connectivity.

Papers
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Journal ArticleDOI
TL;DR: In this article, a monolithically integrated distributed feedback (DFB) laser and traveling-wave electro-absorption modulator (TWEAM) with ges 100 GHz -3 dBe bandwidth suitable for Non-return-to-zero (NRZ) operation with on-off keying (OOK) is presented.
Abstract: A monolithically integrated distributed feedback (DFB) laser and traveling-wave electro-absorption modulator (TWEAM) with ges 100 GHz -3 dBe bandwidth suitable for Non-return-to-zero (NRZ) operation with on-off keying (OOK) is presented. The steady-state, small-signal modulation response, microwave reflection, chirp characteristic, and both data operation and transmission were investigated. The DFB-TWEAM was found to be an attractive candidate for future short distance communication in high bitrates systems.

70 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of a distributed-feedback travelling-wave electroabsorption modulator module for data transmission at 100 Gb/s is presented for the first time and clearly open eye diagrams with an extinction ratio (ER) of 4.2 dB are demonstrated together with data transmission over 100m-long standard singlemode fiber and over dispersion-compensated 10-km fiber link.
Abstract: Performance of a packaged distributed-feedback travelling-wave electroabsorption modulator module for data transmission at 100 Gb/s is presented for the first time. Clearly open eye diagrams at 80 Gb/s with an extinction ratio (ER) of 4.9 dB and 100 Gb/s with ER 4.2 dB (limited by measurement setup) are demonstrated together with data transmission over 100-m-long standard single-mode fiber and over dispersion-compensated 10-km fiber link.

32 citations

Journal ArticleDOI
TL;DR: In this article, an error-free 10 Gbit/s transmission over 21 km fiber with an extinction ratio of 8.5 dB at room temperature (5.1 dB at 70degC) is demonstrated.
Abstract: Long wavelength monomode InGaAs/GaAs quantum dot (QD) distributed feedback (DFB) lasers with emission wavelength around 1325 nm are presented. Threshold currents below 19 mA for operating temperatures up to 70degC and output powers of 10 mW at 25degC (6 mW at 70degC) are observed. Error-free 10 Gbit/s transmission over 21 km fibre with an extinction ratio of 8.5 dB at room temperature (5.1 dB at 70degC) is demonstrated. The low threshold, low temperature sensitivity and high modulation speed were realised using complex coupled DFB lasers with ten stacks of self-organised MBE-grown QD layers and p-type modulation doping

32 citations

Proceedings ArticleDOI
M. Chacinski1, N. Chitica1, S. Molin1, N. Lalic1, O. Sahlen1 
17 Mar 2013
TL;DR: It is reported that error-free transmission was achieved over entire range of 0°C-85°C module case temperature and neither equalization nor CDR were used.
Abstract: We report 25.78Gbps error-free transmission over 114m OM3-fiber using QSFP modules based on 850nm multimode VCSEL. Error-free (10-15) transmission was achieved over entire range of 0°C-85°C module case temperature. Neither equalization nor CDR were used.

31 citations

Journal ArticleDOI
TL;DR: In this paper, the authors studied the dynamics of a distributed Bragg reflector laser with optical losses in the Bragg section and found that the modulation response depends not only on the detuning of the lasing wavelength from the bragg reflectivity peak, but also on the magnitude of the waveguide losses.
Abstract: The dynamics of a distributed Bragg reflector laser with optical losses in the Bragg section is studied in detail. It is found that the modulation response depends not only on the detuning of the lasing wavelength from the Bragg reflectivity peak but also on the magnitude of the waveguide losses in the Bragg section. Depending on the losses, the damping of the relaxation peak can either increase or decrease when the laser is detuned on the long wavelength flank of the Bragg peak. Hence, in order to achieve maximum modulation bandwidth of the laser, the laser needs not only to have the correct detuning but also an optimized waveguide loss in the Bragg section. The physical reason for this dependence is discussed in terms of a modified rate equation model.

30 citations


Cited by
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Journal ArticleDOI
10 Jun 2009
TL;DR: The current performance and future demands of interconnects to and on silicon chips are examined and the requirements for optoelectronic and optical devices are project if optics is to solve the major problems of interConnects for future high-performance silicon chips.
Abstract: We examine the current performance and future demands of interconnects to and on silicon chips. We compare electrical and optical interconnects and project the requirements for optoelectronic and optical devices if optics is to solve the major problems of interconnects for future high-performance silicon chips. Optics has potential benefits in interconnect density, energy, and timing. The necessity of low interconnect energy imposes low limits especially on the energy of the optical output devices, with a ~ 10 fJ/bit device energy target emerging. Some optical modulators and radical laser approaches may meet this requirement. Low (e.g., a few femtofarads or less) photodetector capacitance is important. Very compact wavelength splitters are essential for connecting the information to fibers. Dense waveguides are necessary on-chip or on boards for guided wave optical approaches, especially if very high clock rates or dense wavelength-division multiplexing (WDM) is to be avoided. Free-space optics potentially can handle the necessary bandwidths even without fast clocks or WDM. With such technology, however, optics may enable the continued scaling of interconnect capacity required by future chips.

1,959 citations

Journal ArticleDOI
TL;DR: An overview of different techniques to optically transport mm-wave wireless signals and to overcome impairments associated with the transport of the wireless signals is presented and the different designs of subsystems for integrating fiber-wireless technology onto existing optical infrastructure are reviewed.
Abstract: Hybrid fiber-wireless networks incorporating WDM technology for fixed wireless access operating in the sub-millimeter-wave and millimeter-wave (mm-wave) frequency regions are being actively pursued to provide untethered connectivity for ultrahigh bandwidth communications. The architecture of such radio networks requires a large number of antenna base-stations with high throughput to be deployed to maximize the geographical coverage with the main switching and routing functionalities located in a centralized location. The transportation of mm-wave wireless signals within the hybrid network is subject to several impairments including low opto-electronic conversion efficiency, fiber chromatic dispersion and also degradation due to nonlinearities along the link. One of the major technical challenges in implementing such networks lies in the mitigation of these various optical impairments that the wireless signals experience within the hybrid network. In this paper, we present an overview of different techniques to optically transport mm-wave wireless signals and to overcome impairments associated with the transport of the wireless signals. We also review the different designs of subsystems for integrating fiber-wireless technology onto existing optical infrastructure.

510 citations

Journal ArticleDOI
TL;DR: In this paper, the current status of the hybrid silicon photonic integration platform with emphasis on its prospects for increased integration complexity is reviewed, and it is shown that this platform is well positioned and holds great potential to address future needs for medium-scale photonic integrated circuits.
Abstract: In this paper, we review the current status of the hybrid silicon photonic integration platform with emphasis on its prospects for increased integration complexity. The hybrid silicon platform is maturing fast as increasingly complex circuits are reported with tens of integrated components including on-chip lasers. It is shown that this platform is well positioned and holds great potential to address future needs for medium-scale photonic integrated circuits.

391 citations

Journal ArticleDOI
TL;DR: The objective of these papers is to provide a framework for understanding how this growth in energy consumption can be managed, and to explore the fundamental limits on energy consumption in optical communication systems and networks.
Abstract: The capacity and geographical coverage of the global communications network continue to expand. One consequence of this expansion is a steady growth in the overall energy consumption of the network. This is the first of two papers that explore the fundamental limits on energy consumption in optical communication systems and networks. The objective of these papers is to provide a framework for understanding how this growth in energy consumption can be managed. This paper (Part I) focuses on the energy consumption in optically amplified transport systems. The accompanying paper (Part II) focuses on energy consumption in networks. A key focus of both papers is an analysis of the lower bound on energy consumption. This lower bound gives an indication of the best possible energy efficiency that could ever be achieved. The lower bound on energy in transport systems is limited by the energy consumption in optical amplifiers, and in optical transmitters and receivers. The performance of an optical transport system is ultimately set by the Shannon bound on receiver sensitivity, and depends on factors such as the modulation format, fiber losses, system length, and the spontaneous noise in optical amplifiers. Collectively, these set a lower bound on the number of amplifiers required, and hence, the amplifier energy consumption. It is possible to minimize the total energy consumption of an optically amplified system by locating repeaters strategically. The lower bound on energy consumption in optical transmitters and receivers is limited by device and circuit factors. In commercial optical transport systems, the energy consumption is at least two orders of magnitude larger than the ideal lower bounds described here. The difference between the ideal lower bounds and the actual energy consumption in commercial systems is due to inefficiencies and energy overheads. A key strategy in reducing the energy consumption of optical transport systems will be to reduce these inefficiencies and overheads.

215 citations

Journal ArticleDOI
TL;DR: A novel integrated silicon and ultra-low-loss Si3N4 waveguide platform with minimum propagation loss measured in the ultra- low-loss waveguides is 1.2 dB/m in the 1590 nm wavelength regime.
Abstract: We demonstrate a novel integrated silicon and ultra-low-loss Si3N4 waveguide platform. Coupling between layers is achieved with (0.4 ± 0.2) dB of loss per transition and a 20 nm 3-dB bandwidth for one tapered coupler design and with (0.8 ± 0.2) dB of loss per transition and a 100 nm 3-dB bandwidth for another. The minimum propagation loss measured in the ultra-low-loss waveguides is 1.2 dB/m in the 1590 nm wavelength regime.

150 citations