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SNR enhancement of Raman-based long-range distributed temperature sensors using cyclic Simplex codes

Publications associées (95)

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Planar microcoil-based microfluidic NMR probes

Nico de Rooij, Giovanni Boero, Radivoje Popovic, Pierre-André Besse, Franck Vincent, Charles Massin, Klaus Ehrmann

Microfabricated small-volume NMR probes consisting of electroplated planar microcoils integrated on a glass substrate with etched microfluidic channels are fabricated and tested. 1H NMR spectra are acquired at 300MHz with three different probes having obse ...

2003

2-D sensor position perturbation analysis: Equivalence to AWGN on array outputs

Volkan Cevher

In this paper, the performance of a subspace beamformer, namely the multiple signal classification algorithm (MUSIC), is scrutinized in the presence of sensor position errors. Based on a perturbation model, a relationship between the array autocorrelation ...

2002

Waveguide-enhanced scattering from thin biomolecular films

An X-ray diffraction experiment on multilamellar membranes incorporated into an X-ray waveguide structure is reported. In the device, the lipid bilayers are confined to one side by the silicon substrate and to the other side by an evaporated thin metal cap ...

2002

Stability and performance analysis of an adaptive sigma-delta modulator

Ali H. Sayed

This work develops an adaptive sigma-delta modulator that is based on adapting the quantizer step-size using estimates of the quantizer input rather than the modulator input. The adaptive modulator with a first-order noise shaping filter is shown to be bou ...

IEEE2001

Holographic memory with localized recording

Demetri Psaltis

We experimentally demonstrate and characterize a memory module that features selective page erasure and readout persistence using the localized recording method in doubly doped LiNbO3. Pages of information can be selectively erased without partially erasin ...

2001

New Investigations on the Effect of Fiber Amplifier Phase Noise

René Dändliker

We investigated the effect of the phase noise of fiber amplifiers on the linewidth of the amplified signal. We used three different sources as input signal, with linewidth between 5 kHZ and 18 GHz. We did not observe any spectral broadening of the signal l ...

2001

The pixel size limit for a holographic memory system

Demetri Psaltis, Wei Liu

Compact holographic memory architecture with phase conjugate readout and diffraction suppression by internal reflection is investigated. The pixel size requirement for a competitive system is determined. The bandwidth of the holographic recording in LiNbO3 ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa1999

Pixel size limit in holographic memories

Demetri Psaltis, Wei Liu

The bandwidth of holographic recording in LiNbO3 (Fe doped) in the 90 degrees geometry is studied theoretically and experimentally. The wide holographic bandwidth of LiNbO3 makes it possible to record submicrometer pixels and reconstruct them by phase conj ...

1999

Improving the signal-to-noise ratio of femtosecond luminescence upconversion by multichannel detection

Benoît Marie Joseph Deveaud

We have improved the sensitivity and signal-to-noise ratio of a luminescence upconversion experiment, using a charge-coupled device (CCD) as the detector. We show experimentally and numerically that the bandwidth of a 1-mm-thick beta-barium berate crystal ...

1998

Approaching the AWGN Channel Capacity without Active Shaping

Rüdiger Urbanke, Bixio Rimoldi

It is shown that the capacity of the AWGN channel can be approached via a multilevel coding scheme with the output of each encoder mapped into an independent signal constellation. No active shaping is required in this scheme, regardless of the signal-to-no ...

1997