We report a novel method to measure two important parameters for optical fiber intensity modulated transmission systems: dispersion of fibers and chirp parameter light emitters. The is easy, quick, accurate in the -10-to-10 range.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

We have measured sub-shot-noise quantum correlations of spatial fluctuations in the far-field image parametric fluorescence created a type I beta-barium-borate nonlinear crystal. Imaging is performed at very low light level (0.15 photons per pixel) with an electron multiplying charge coupled device camera. Experimental results overcome standard limit shot-noise without subtraction variance detection noise.

This article consists of a collection slides from the author's conference presentation.

Spatially entangled twin photons provide both promising resources for modern quantum information protocols, because of the high dimensionality transverse entanglement, and a test Einstein-Podolsky-Rosen(EPR) paradox in its original form position versus impulsion. Usually, temporal coincidence are selected their positions recorded, resulting priori assumptions on spatio-temporal behavior. Here, we record two separate electron-multiplying charge coupled devices (EMCCD) cameras images entire...

We demonstrate Einstein-Podolsky-Rosen (EPR) entanglement by detecting purely spatial quantum correlations in the near and far fields of spontaneous parametric down-conversion generated a type-2 beta barium borate crystal. Full-field imaging is performed photon-counting regime with an electron-multiplying CCD camera. The data are used without any postselection, we obtain violation Heisenberg inequalities inferred quantities taking into account all biphoton pairs both integration on entire...

Ghost imaging is a fascinating process, where light interacting with an object recorded without resolution, but the shape of nevertheless retrieved, thanks to quantum or classical correlations this either computed detected random signal. Recently, ghost has been extended time object, by using several thousands copies periodic object. Here, we present very simple device, inspired computational imaging, that allows retrieval single non-reproducible, non-periodic, temporal The reconstruction...

The concept of optical beam self-trapping in pyroelectric photorefractive medium is presented. We show that the temperature controlled spontaneous polarisation ferroelectric crystals produces an nonlinearity can lead to formation 2-D spatial soliton named pyroliton. Experimental demonstrations performed lithium niobate illustrate efficient occurs either for ordinary or extraordinary under moderate increase. For instance, a 15 microm diameter pyroliton be formed with 10 degree raise.

Nonlinear periodically poled ridge LiNbO3 waveguides have been fabricated on silicon substrates. Components are carved with only the use of a precision dicing machine without need for grinding or polishing steps. They show efficient second harmonic generation at telecommunication wavelengths normalized conversion reaching 204%/W in 15 mm long device. The influence geometrical non uniformities due to fabrication processes is asserted. Characteristics components studied; notably their...

This paper investigates utilizing zero span UHF PD detection. The findings suggest that the technique is a practical solution for on-line monitoring of transformers in presence noise and also permits use existing knowledge on defect signatures.

By means of a phase-conjugation experiment by nondegenerate six-wave mixing, we demonstrate transient ${\mathrm{\ensuremath{\chi}}}^{(2)}$ grating induced nonzero ${\mathit{E}}^{3}$ time average in solution noncentrosymmetric dye molecules. The origin the phase-matched second-harmonic generation is found an orientational hole-burning effect. Its lifetime, limited molecule rotation, 210\ifmmode\pm\else\textpm\fi{}10 psec and magnitude reaches...

The authors have fabricated a ridge waveguide electroabsorption modulator based on the quantum-confined Stark effect in InGaAsP/InGaAsP multiple quantum wells. drive voltage for 12-dB extinction ratio is 1.2 V, and frequency response flat within 2 dB from DC to 20 GHz. Operation at Gb/s reported. Extensive data concerning parasitic phase modulation (chirping) are obtained as function of applied bias acid operating wavelength.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

We present the first experimental demonstration of noiseless amplification images, where noise refers to spatial quantum fluctuations on pixels single shot images. Phase-sensitive and phase-insensitive schemes are compared figures in good agreement with theory, inasmuch this theory includes efficiency whole system pixel size.

A multi-imaging strategy is proposed and experimentally tested to improve the accuracy of photon counting with an electron multiplying charge-coupled device (EMCCD), by taking into account random nature its on-chip gain possibility multiple photo-detection events on one pixel. This based Bayesian estimation each image, a priori information given sum images. The method works even for images large dynamic range, more improvement in low light level areas. In these areas, two thirds variance...

We report ghost imaging of a single non-reproducible temporal signal in the range tens kHz by using pseudo-thermal speckle light patterns and detector array with million pixels working without any resolution. A set is generated deterministically at radio-frequency rate, multiplied time integrated shot camera. The information retrieved computing spatial intensity correlations between this image each pattern set.

The chirp parameter of a multiple-quantum-well (MQW) electroabsorption modulator was measured with accuracy for several operating wavelengths in the 1.5 /spl mu/m window. It varied strongly applied bias. Effective parameter, defined as ratio phase change to transmission between on and off states, is about zero, or even negative. However, experimental length standard fiber at 10 Gb/s NRZ much smaller than what expected such low parameter. demonstrated that effective should not be computed...

We use twin photons generated by spontaneous parametric down conversion to perform temporal ghost imaging of a single time signal. The retrieval binary signal containing eight bits is performed with an error rate below 1%.

Monolithically integrated single frequency lasers and electroabsorption modulators are attracting considerable interest as optical sources for long-haul high-bit-rate fiber-optic links. Their chirpless nature has indeed allowed nonreturn-to-zero (NRZ) transmission beyond the chromatic dispersion limit. They also offer a great potential soliton pulse generators. This paper discusses many integration schemes devised their realization with particular emphasis on identical active layer (IAL)...

The authors demonstrate an all-optical wavelength conversion technique that overcomes the carrier recovery time constraints of SOAs, enabling RZ output signals. Penalty-free at 40 Gbit/s over 30 nm, with a monolithically integrated Mach-Zehnder interferometer is demonstrated for first time.

Thermoelectric-power measurements are reported for four copper oxide superconductor systems: ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathit{y}}$${\mathrm{Sr}}_{\mathit{y}}$${\mathrm{CuO}}_{4}$, ${\mathrm{Nd}}_{1+\mathit{y}}$${\mathrm{Ba}}_{2\mathrm{\ensuremath{-}}\mathit{y}}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{6+\mathit{x}}$,...

We report on low-loss vertical tapers for efficient coupling between confined LiNbO3 optical ridge waveguides and Single Mode Fibers. 3D-Pseudo-Spectral-Time-Domain calculations Optical-Coherence-Tomography-based methods are advantageously used the numerical experimental study of tapers. The tapered-section is done simultaneously with waveguide by means a circular precision dicing saw, so that fabrication procedure achieved in only two steps. total insertion losses through 1.6 cm long...

The picosecond parametric amplification of a polychromatic image with wavelength bandwidth 140 nm and gain 15 dB has been obtained in lithium triborate type-I crystal (LBO). Approximately 8 lines/mm both lateral dimensions were resolved the plane. This resolution value is good agreement numerical study phase-matching conditions near collinear degeneracy, where phase matching noncritical for signal beam angle as well wavelength. monochromatic LBO also studied. Because their polarizations are...

A novel and very simple approach is demonstrated for distributed feedback laser-electroabsorption modulator monolithic integration. This uses the same strained multiquantum well active layer both optical functions. Very high performance (13.6 dB extinction ratio at 1.5 V operating voltage a 70 µm long modulator) reported µm.

Conventional high-speed (>10 GHz) external modulators at 1.55 mu m exist in various types and on several kinds of substrate material. Only electroabsorption InP have so far demonstrated polarization-independent operation high speeds. In this paper, the properties two strained multiple quantum well (MQW) are reviewed context optical fibre communications terms loss, drive voltage, bandwidth (>40 GHz), eye diagram, bit error rate measurements power handling capacity. An effective modulation...

The design, fabrication, and performance of double-stage taper photodiodes (DSTPs) are reported. objective this work is to develop devices compatible with 40-Gb/s applications. Such require high efficiency, ultrawide band, optical power handling capability, compatibility low-cost module fabrication. integration mode size converters improves both the coupling efficiency responsivity a large fiber diameter. Responsivity 0.6 A/W 0.45 achieved 6-/spl mu/m diameter cleaved fiber, respectively,...