Showing papers by "Orange S.A. published in 1984"
TL;DR: In this paper, a 1.57-μm distributed feedback laser fabricated on material grown by two-step low-pressure metalorganic chemical vapor deposition growth process is reported for the first time.
Abstract: Continuous wave operation of 1.57‐μm distributed feedback lasers fabricated on material grown by two‐step low‐pressure metalorganic chemical vapor deposition growth process is reported for the first time. Room‐temperature continuous wave threshold currents as low as 60 mA have been measured for devices with cavity length of 300 μm and stripe width of 5 μm. Single longitudinal mode operation at fixed mode was obtained under the continuous wave condition, in the temperature range 9–90 °C, with the wavelength shift of 0.9 A/°C. A stop band of 25 A in which no resonance mode emission existed, was observed in the output spectrum of the distributed feedback laser.
32 citations
TL;DR: In this article, the singularity analysis in the complex-time plane is used to investigate the Painleve property, which according to the Ablowitz-Ramani-Segur conjecture is a prerequisite for integrability for infinite-dimensional systems.
Abstract: We examine a system described by two first‐order nonlinear differential equations from the point of view of integrability. The singularity analysis in the complex‐time plane is used to investigate the Painleve property, which according to the Ablowitz–Ramani–Segur conjecture is a prerequisite for integrability for infinite‐dimensional systems. We show that for such low‐dimensional systems, the Painleve analysis is still a most useful guide, but integrable cases also exist which do not possess the Painleve property.
27 citations