NONLINEAR LIMITATIONS OF ELECTRONIC DISPERSION PRE-COMPENSATION BY INTRACHANNEL EFFECTS

  • Audoin M
  • Buchali F.
  • Bulow H.
  • Klekamp A.

The nonlinear threshold (NLT) characteristics of 10 Gbit/s transmission using electronic pre-compensation is studied by numerical simulations over 1 span and 12 spans of 80 km SMF for NRZ and DPSK, respectively. We found a reduction of NLT of up to 9 dB for ASK.

LOW COST MMIC CHIPSET FOR VSAT GROUND TERMINALS

  • Butel Y.
  • Cazaux J.
  • Coury G
  • Decroix J
  • Langrez D.
  • Villemazet J.

This paper presents results of a Ka-band VSAT ground terminal MMIC chipset developed in a cost reduction context. The first one, a low level multifunction designed for up-conversion with high gain driver, exhibits a 17 dB conversion gain with an associated P/sub 1dB/ output power close to +18 dBm. The ...

BURIED RIDGE STRIPE LASERS USING INAS/INP (100) QUANTUM DASHES BASED ACTIVE LAYER : A STEP TOWARDS LOW NOISE SOURCES FOR HIGH-SPEED DIRECT MODULATION

  • Accard A.
  • Dagens B.
  • Duan G.
  • Landreau J.
  • Le Gouezigou L.
  • Le Gouezigou O.
  • Lelarge F.
  • Make D.
  • Martin F.
  • Poingt F.
  • Pommereau F.
  • Provost J.
  • Renaudier J.
  • Rousseau B.
  • Van Dijk F.

We investigate the devices performances of InAs/InP (100) quantum dash buried stripe ridge lasers. We demonstrate high-gain quantum dash based lasers whose dynamic properties are compatible with high-speed devices requirements. The good temperature characteristic of such lasers allows 10 Gb/s direct modulation in the temperature range of 25-75/spl deg/C. The ...

50 GB/S DFF AND DECISION CIRCUITS IN INP DHBT TECHNOLOGY FOR ETDM SYSTEMS

  • Godin J.
  • Jorge F.
  • Konczykowska A.
  • Moulu J.
  • Riet M.

In this paper we present two ICs fabricated in InP DHBT technology and devoted to 43 Gbit/s and over transmission systems : reshaping DFF for the transmitter and decision circuit for the receiver. High quality system operation and ease of insertion in system environment are achieved simultaneously with significant reduction ...

MULTILAYER RF PCB FOR SPACE APPLICATIONS : TECHNOLOGICAL AND INTERCONNECTIONS TRADE-OFF

  • Bodereau F
  • Cazaux J.
  • Drevon C.
  • Monfraix P.
  • Paillard M.

Multilayer RF printed circuits boards with embedded passives are complex structures to manufacture and to package while keeping good RF performances. In this paper, technological solutions aimed at simplifying these issues are proposed : the use of thermoset materials instead of thermoplastic laminates and an original interconnection technique based on ...

THERMAL MANAGEMENT OF POWER HBT IN PULSED OPERATING MODE

  • Chartier E.
  • Floriot D.
  • Jacquet J.

We focus this paper on the improvement of the thermal management of power transistor based on the InGaP/GaAs HBT technology and specially for pulsed mode application. Applied to very HBT high power transistor, from 10 W to 3 W, respectively for L to Ku bands radar applications, a specific study ...

OPTIMISED THERMAL AND MICROWAVE PACKAGING FOR WIDE-BAND GAP TRANSISTORS : DIAMOND & FLIP CHIP

  • Cazaux J.
  • Drevon C.
  • Forrestier S
  • Geffroy D
  • Michard F.
  • Schaffauser C.
  • Vendier O.
  • Villemazet J.

Wide-band gap (WBG) transistors give a real breakthrough for power devices compared to silicon (Si) and gallium arsenide (GaAs) components. However, for space applications, the high power density of WBG transistors makes the thermal management critical and requires thermal investigations. Some packaging solutions dedicated to those power transistors are presented ...

GEOMETRY-DRIVEN PHOTOREALISTIC FACIAL EXPRESSION SYNTHESIS

  • Zhang Q.

Expression mapping (also called performance driven animation) has been a popular method for generating facial animations. A shortcoming of this method is that it does not generate expression details such as the wrinkles due to skin deformations. In this paper, we provide a solution to this problem. We have developed ...

DESIGN AND FABRICATION OF A P-I-N PHOTODIODE WITH HIGH RESPONSIVITY AND LARGE ALIGNMENT TOLERANCES FOR 40 GB/S APPLICATIONS

  • Achouche M.
  • Carpentier D.
  • Derouin E.
  • Jany C.

This letter demonstrates an evanescently coupled p-i-n photodiode combined with a multimode diluted waveguide using a simple all 2-in InP processing that includes on-wafer mirrors etching and antireflection coating. A high responsivity of 0.81 A/W at 1.55 /spl mu/m with less than 0.4-dB polarization dependence and a large -1-dB vertical ...

HIGH EXTINCTION RATIO AND HIGH TEMPERATURE 2.5 GB/S FLOOR-FREE 1.3MICRO-M TRANSMISSION WITH A DIRECTLY MODULATED QUANTUM DOT LASER

  • Dagens B.
  • Le Gouezigou O.
  • Make D.
  • Provost J.

For the first time with a directly modulated InAs-GaAs quantum-dot laser, high extinction ratio (up to 17 dB) and 25/spl deg/C-85/spl deg/C single-mode-fiber data floor-free transmissions are achieved at 2.5 Gb/s. Moreover, an interferometric technique showed a nearly constant Henry factor /spl sim/2 until a bias current six times the ...

TOWARD HIGH-SPEED 40 GBIT/S TRANSPONDERS

  • Leclerc O.
  • Scavennec A.

Today a 40-Gbit/s data rate is agreed by major optical telecommunication players as the next step in the network evolution, with an actual deployment foreseen in the 2007-2008 timeframe. R&D activities on technologies for 40-Gbit/s products are currently active but the path to 40-Gbit/s transponders is not yet fully settled. ...

PROGRESS IN OPTICAL MODULATION FORMATS FOR HIGH-BIT-RATE WDM TRANSMISSIONS

  • Charlet G.

With the progress of optical communication systems, and especially the constraints brought by wavelength division multiplexing (WDM) transmissions and increased bit rates, new ways to convert the binary data signal on the optical carrier have been proposed. It appears clearly now that several of the methods proposed by research laboratories ...

FIBRE NONLINEAR THRESHOLD COMPARISON OF SMF AND NZDSF TYPES ON BINARY 43 GB/S MODULATION FORMATS

  • Dischler R.
  • Idler W.
  • Klekamp A.

We compared experimentally the maximum fibre input power of SMF, TeraLight and TrueWave fibres (single span) on 43 Gb/s ASK/DPSK formats, covering NRZ and RZ formats. At DPSK SMF yields highest fibre input power and highest pre-dispersion tolerance.

REQUIREMENTS UNCERTAINLY : INFLUENCING FACTORS AND CONCRETE IMPROVEMENTS

  • De Man J.
  • Ebert C.

Practically all industry studies on software project results conclude that good requirements engineering plays a pivotal role for successful projects. A key reason for project failures is insufficient management of changing requirements during all stages of the project life cycle. This article investigates one of the root causes for changing ...

TECHNOLOGIES AND APPLICATIONS OF TWO-DIMENSIONAL INP-BASED PHOTONIC CRYSTALS

  • Attali M.
  • Brenot R.
  • Cuisin C.
  • Derouin E.
  • Drisse O.
  • Duan G.
  • Landreau J.
  • Le Gouezigou L.
  • Lelarge F.
  • Poingt F.
  • Pommereau F.
  • Rousseau B.

This invited paper gives an overview of the recent advances on two-dimensional photonic crystals on InP based materials. In particular, the fabrication approach developed at Alcatel-Thales III-V Lab is described in detail. Optical characterisation of photonic crystal building blocks is presented. Results on functional optoelectronic devices, such as high power ...

A X/X SPREAD SPECTRUM TRANSPONDER FOR SECURE COMMUNICATION

  • Argentieri F
  • Barletta F
  • Cocchi S
  • Comparini M-C
  • De Tiberis F
  • Delfino M
  • Felici F
  • Gelfusa D
  • Martinazzo I
  • Novello R
  • Panella P
  • Simone L.
  • Viola R

Aim of this paper is to provide an overview of Alcatel Alenia Space – Italy (AAS-I) Spread-Spectrum Transponder platform placing emphasis on its advanced features for secure Telemetry, Tracking & Command (TT& C) applications.

THE KOREASAT 5 SECURE COMMUNICATION SYSTEM : DESIGN, DEVELOPMENT & PERFORMANCE

  • Autelitano F
  • Barletta F
  • Bernardi A
  • Cocchi S
  • Comparini M-C
  • De Tiberis F
  • Delfino P
  • Felici F
  • Fiore D
  • Gelfusa D
  • Lippolis G
  • Martinazzo I
  • Novello R
  • Panella P
  • Paolucci S
  • Parisse M
  • Piloni V
  • Salerno N.
  • Simone L.
  • Viola R

This paper presents the Koreasat 5 secure communication system that has been design and developed by Alcatel Alenia Space - Italy (AAS-I) for Agency for Defense Development - South Korea.

HIGH DATA RATE 8PSK TRANSMITTER FOR X-BAND PAYLOAD TELEMETRY

  • Cartier N.
  • Oster J.

Up to now, telemetry systems for Earth observation satellites have had to rely on QPSK modulation. Alcatel has developed, in co-operation with CNES, a new telemetry system based on trellis-coded 8PSK modulation, offering a 622 Mbps download capability in the X band (8025-8400 MHz). This telemetry system is used on ...

3D PACKAGING FOR SPACE APPLICATION : IMAGINATION AND REALITY

  • Cazaux J.
  • Drevon C.
  • Monfraix P.
  • Paillard M.
  • Schaffauser C.
  • Vendier O.

This paper describes the ALCATEL experience on the design, manufacturing and measurement of microwave and digital modules based on 3D packaging approach. Even if that appears as a very futuristic approach today, this could represent a packaging option for the next space equipment generation by the years 2015-2025. This implies ...

MAIN ACHIEVEMENTS TO DATE TOWARD THE USE OF RF MEMS INTO SPACE SATELLITE PAYLOADS

  • Caille G.
  • Cazaux J.
  • Drevon C.
  • Forrestier S
  • Legay H.
  • Paillard M.
  • Schaffauser C.
  • Vendier O.

MEMS (microelectromechanical systems) technology plays a key role in the on-going miniaturization of electronic modules for automotive and consumer electronic products. In the microwave field, RF MEMS switches exhibit excellent RF properties as low power consumption, high linearity, low loss and high isolation compared to solid state electronic solutions. Based ...