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Journals and Conferences
Andreas Stöhr,* Akram Akrout, Rüdiger Buß, Benoit Charbonnier, Frederic van Dijk, Alain Enard, Sascha Fedderwitz, Dieter Jäger, Mathieu Huchard, Frédéric Lecoche, Javier Marti, Rakesh Sambaraju, Andreas Steffan, Andreas Umbach, and Mario Weiß Universität Duisburg-Essen, Optoelektronik, Lotharstrasse 55, 47057 Duisburg, Germany Alcatel-Thales III-V Labs,… (More)
In this paper, a 3-bit optical beamforming architecture based in 2/spl times/2 optical switches and dispersive media is proposed and demonstrated. The performance of this photonic beamformer is experimentally demonstrated at 42.7 GHz in both transmission and reception modes. The progress achieved for realizing these architectures with integrated optics is… (More)
Next-generation wireless communications systems need to have high throughputs to satisfy user demand, to be low-cost, and to have an efficient management as principal features. Using a high-performance, low-cost reflective semiconductor optical amplifier (RSOA) as a colorless remote modulator at the antenna unit, the wavelength-division multiplexing (WDM)… (More)
We report two uni-traveling-carrier photodiode (PD) structures, for high-power and high-linearity applications. Using a thick collection layer (500 nm), the fabricated 25-m-diameter PDs achieve a 3-dB bandwidth up to 29 GHz, and a maximum dissipated heat power of about 480 mW, simultaneously. A new collector design with a nonuniform doping profile is… (More)
We have developed a dual wavelength DFB laser for the generation of a widely tunable microwave signal. In order to obtain a narrow linewidth of the generated signal, we have focused the development of the source on the reduction of the linewidth of each generated wavelengths. The best results were obtained with a device using 2500 µm long DFB… (More)
Quantum dash active region Fabry-Perot lasers emitting at 1570 nm without an absorbing section have been evaluated as an optical source for microwave signal generation. These devices self-pulsate at 39.9 GHz with a mode-beating spectral linewidth as narrow as 10 kHz. Integration of these devices into an Opto-Electronic Oscillator has been performed,… (More)
We have developed a 1-mm-long high-power DFB laser using an asymmetrical cladding based on the dilute waveguide technique. We have obtained about 180 mW output power at 25°C and >;30 mW at 15°C-85°C chip temperature with >;55-dB sidemode suppression ratio. This temperature range allows a 9.7-nm wavelength tunability. For high… (More)
In order to achieve a high output power, high gain and high dynamic range directly modulated optical link, we have developed a high power and low noise DFB laser and a high power handling and high efficiency photodiode with specific designs. The laser exhibits high power (180 mW), high efficiency (0.4 W/A), low RIN and a 7.4 GHz modulation bandwidth. The… (More)
In this paper we present the remarkable characteristics of quantum dash mode-locked lasers and how they could be used for low phase noise signal generation, for high data rate wireless transmission and radar in the millimeter wave frequency range.
We present a quantum dash laser with more than 120 mW/facet at 1.2 A based on an asymmetrical cladding. Passive mode-locking with an RF -3dB linewidth of 3.2 kHz at 20.7 GHz has been demonstrated.