The role of MBE in recent Quantum Hall Effect physics discoveries

  • Pfeiffer L.
  • West K.

Much of the experimental progress in Quantum Hall and Composite Fermion physics over the past seventeen years has depended on the continuous improvement of the carrier mobility of the two dimensional systems at the semiconductor heterojunction. During this time the highest reported 2D electron mobility has increased by over a ...

p/2 Alternate-Phase On-Off Keyed 42.7 Gb/s Long Haul Transmission Over 1980 km of Standard Single Mode Fiber

  • Gill D.
  • Gnauck A.
  • Liu X.
  • Su Y.
  • Wei X.

We present 42.7 Gb/s return-to-zero on-off keying pulse-overlapped 1980-km transmission experiments on standard single mode fiber, which compare the performance of the 33%-duty-cycle p/2 alternate- phase format to the 33%-duty-cycle return-to-zero and the 67%- duty-cycle carrier-suppressed return-to-zero on-off keying formats. We show that an effective reduction in nonlinear transmission penalty ...

Comparison of Modulation Formats for 42.7-Gb/s Single-Channel Transmission over 2000 km of SSMF

  • Burrows Jr E.
  • Gill D.
  • Gnauck A.
  • Liu X.
  • Wei X.

We experimentally compare non-return-to-zero and return-to- zero on-off keying with a number of recently proposed alternative modulation formats for 2000-km 42.7-Gb/s single-channel transmission over standard single-mode fiber. Substantial performance improvements are obtained with the new formats, confirming simulation results and analytical analysis.

10-Gsample/s Optoelectronic A/D Converter

  • Baeyens Y.
  • Chen Y.
  • Lee J.
  • Link T.
  • Roux P.

A 5-bit,10-GSample/s flash A/D converter (ADC) is fabricated for 10-Gb/s optical receivers. To achieve a 10 GSample/s rate with wide signal bandwidth, our design focus on reducing aperture uncertainty, clock skew, and metastability error. The ADC achieves a 4.1 effective bits at low input frequencies and 2.8 effective bits at ...

Multiple-Band Bit-Level Switching in Two-Pump Fiber Parametric Devices

  • Centanni J.
  • Chraplyvy A.
  • Gnauck A.
  • Jopson R.
  • Mckinstrie C.
  • Radic S.

We investigated the feasibility of multiple-band switching using a two-pump fiber parametric device. The switching architecture combines band amplification, wavelength conversion and selective signal conjugation, enabled by temporal control of one or both parametric pumps. A switching scheme with a single pump control was constructed and evaluated. Multiple-band, bit-level optical ...

Optimal DCM selection fo an optical line system

  • Chekuri C.
  • Lee W.
  • Zhang Y.

We study Dispersion Compensation Module (DCM) selection for an optical line system in DWDM networks. We present a scalable and optimal algorithm using dynamic programming to obtain a least cost feasible solution.

High Performance Variable Optical Attenuator Multiplexer Filter (VMUX)

  • Cappuzzo M.
  • Chen E.
  • Earnshaw M.
  • Gomez L.
  • Griffin A.
  • Laskowski E.
  • Wong-Foy A.

We report progress on improving performance of fully integrated variable optical attenuator multiplexers (VMUXs) with reduced size and power consumption. We show substantial performance improvements, notable very low loss and PDL, and the realization of extremely compact designs in high delta silica-on-silicon. ÆÉ2004 Optical Society of America OCIS codes: (060.2330) ...

Improved tests of extra-dimensional physics and thermal quantum field theory from new Casimir force measurements

  • Decca R.
  • Fischbach E.
  • Klimchitskaya G.
  • Krause D.
  • Lopez O.
  • Mostepanenko V.

We report new constraints on extra-dimensional models and other physics beyond the Standard Model based on measurements of the Casimir force between two dissimilar metals for separations in the range 0.2–1.2 um. The Casimir force between an Au-coated sphere and a Cu-coated plate of a microelectromechanical torsional oscillator was measured ...

Precise determination of the casimir force and first realization of the "Casimir less" experiment

  • Chan H.
  • Decca R.
  • Fischbach E.
  • Klimchitskaya G.
  • Krause D.
  • Lopez O.
  • Mostepanenko V.

We present improved Casimir effect measurements. The attractive force betweena metallized sphere and the coated plate of a Si microelectromechanical oscillator is measured with unparalleled precision. The same setup, but in a dynamic scheme, yields a determination of the Casimir pressure between two infinite plates. Since the Casimir force is ...

Multichannel PMD Mitigation and Outage Reduction Through FEC with Sub-Burst-Error-Correcting-Period PMD Scrambling

  • De Lind Van Wijngaarden A.
  • Liu X.
  • Xie C.

We propose a multichannel polarization-mode-dispersion (PMD) mitigation scheme in which forward-error-correction (FEC) is utilized in conjunction with distributed fast polarization scrambling that changes the link PMD to at least two random states within each burst-error-correcting-period, simultaneously for all WDM channels. By limiting PMD induced “outages” to last shorter than the ...

An InGaAs/InP HBT Differential Transimpedance Amplifier With 47 GHz Bandwidth

  • Baeyens Y.
  • Chen Y.
  • Frackoviak J.
  • Georgiou G.
  • Houtsma V.
  • Kopf R.
  • Lee J.
  • Leven A.
  • Reyes R.
  • Sung W.
  • Tate A.
  • Weimann N.
  • Weiner J.
  • Yang Y.

In this paper, we describe an InGaAs/InP heterostructure bipolar transistor diffferential transimpedance amplifier with high bandwidth of 47 GHz and high gain of 56 dB-ohms.

Magnetic order in lightly doped La_2-xSr_xCuO_4

  • Ando Y.
  • Blumberg G.
  • Dennis B.
  • Gozar A.
  • Komiya S.

We study magnetic Raman scattering in La_2-xSr_xCuO_4 (x < 0.03) detwinned crystals. The anisotropic dispersion with magnetic field of the lowest spin-wave gap around 17 cm-1 is mapped in La2CuO4. Only 1% Sr doping softens by 30% the sharp gap resonance which disappears beyond the boundary of antiferromagnetic order. In ...

A Highly-Parallel VLSI Architecture for a List Sphere Detector

  • Knagge G.
  • Widdup B.
  • Woodward G.

Finding the nearest point in a lattice is an NP-hard problem for which we desire a simplified architecture. Furthermore, output of confidence measures or soft information is desirable for decoding/detection problems, yet generating such information further complicates the task. This paper presents an efficient and highly parallelisable architecture for the ...

Fault Management for Networks with Link-State Routing Protocols

  • Hao R.
  • Lee D.
  • Ma J.
  • Yang J.

For network fault management, we present a new technique that is based on on-line monitoring of networks with link-state routing protocols, such as OSPF and integrated IS-IS. Our approach employs an agent that monitors the on-line information of link-state database of the network, analyzes the events generated from the network ...

Highly-Integrated Planar Lightwave Circuit Wavelength Selective Switch

  • Cappuzzo M.
  • Chen E.
  • Earnshaw M.
  • Gomez L.
  • Griffin A.
  • Laskowski E.
  • Wong-Foy A.

We report for the first time large-scale integration of AWG filters and thermo-optic switches and attenuators in 2% delta silica-on-silicon waveguides. A compact high performance wavelength selective switch is demonstrated.

CAN: Configurable Access Network for Maximizing the Life-Time of Static Ad-hoc Networks with QoS Guarantees

  • Bejerano Y.
  • Kumar A.

This work considers the problem of designing management algorithms for maximizing the lifetime of static multi-hop wireless networks, while ensuring QoS requirements such as bandwidth and delay. These networks are composed of a set of wireless stations where some of them, termed “access points”, function as gateways to access a ...

All-Optical Wavelength Conversion Using a Pulse Reformatting Optical Filter

  • Cabot S.
  • Giles R.
  • Jaques J.
  • Leuthold J.
  • Marom D.
  • Ryf R.

We introduce a general concept for the design of all-optical wavelength converters with pulse reformatting functionality. The novel wavelength converters are based on a single semiconductor optical ampliflier (SOA) followed by an optical filter. A micro-electro-mechanical-system (MEMS) based realization is shown and similutaneous 40 Gb/s wavelength conversion, switching and signal ...

Large Deviation Principle for Occupancy Problems with Colored Balls

  • Dupuis P.
  • Nuzman C.
  • Whiting P.

A Large Deviations Principle (LDP), demonstrated for occupancy problems with indistinguishable balls, is generalized to the case in which balls may be distinguished by a finite number of colors. The colors of the balls are chosen independently from the occupancy process itself. There are $r$ balls thrown into $n$ urns ...

Distributed Network Scheduling for Time-domain Wavelength Interleaved Networks

  • Saniee I.
  • Widjaja I.

Time-domain Wavelength Interleaved Network (TWIN) is a newly proposed thin-layer network that provides transport services for synchronous and asynchronous traffic. Each source node has a tunable laser to transmit bursts to various destinations. The interior nodes route each burst independently based on the wavelength of the burst. Each destination node ...

Capacity of a Gaussian MIMO Channel with Nonzero Mean

  • Simon S.
  • Valenzuela R.
  • Venkatesan S.

We characterize the input covariance that maximizes the ergodic capacity of a flat-fading, multiple-input-multiple-output (MIMO) channel with additive white Gaussian noise, when the entries of the channel matrix are independent, circularly symmetric, complex Gaussian random variables of nonzero (and possibly different) means and identical variances. We show that the optimal ...