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Biased current and temperature dependence of amplified spontaneous emission injection-locked reflective semiconductor optical amplifier based transmitter directly modulated at 622 Mbit/sec and 1.25 Gbit/sec in DWDM-PON system with channel spacing of 200 GHz are characterized.
We demonstrate that light near a targeted quantum dot embedded in photonic crystals can be strongly confined or completely released using pump laser pulses, which may provide a basic operation of nano-photonic switching.
The optical modulation of Si ring resonator by applying electric-field was, for the first time, achieved although carrier injection type modulations were reported. The 33% optical modulation was realized at applied voltage of 200 V.
We have developed a 300-pin optical duo-binary transceiver, which employed a full L-band tunable-laser array and a variable optical attenuator, for L-band DWDM network. Transmission was demonstrated up to a chromatic dispersion of 3000 ps/nm.
Today's microprocessors are driven in performance by increases in the number of on-chip parallel computational cores rather than by the sheer acceleration of transistor speeds. These emerging chip multiprocessors (CMPs) are fundamentally different from traditional unicore microprocessors with architectures that essentially resemble highly parallel computing systems on-chip. Achieving maximum utilization...
III-Vsilicon-on-insulator photonics comprises the heterogeneous integration of a III-V layer on top of an SOI waveguide circuit. We elaborate on the fabrication technology and the realization of III-V/SOI photonic integrated circuits.
We propose and demonstrate the use of optical signal processing to enhance the security of data networks. Optical steganography is used to inhibit the observation and analysis of data traffic. With the use of optical CDMA, service interruption is prevented in the presence of infrastructure attacks. The soft blocking capability provides protection paths without the need of permanently reserving the...
This paper outlines the state of art of optical networking and how innovation coming from components and subsystems will enable the deployment of agile optical networks. Then, the European Technology Platform Photonics21 is introduced, with its roadmap for optical technologies.
Optical signal processing holds the promise of enhancing the performance and stability of optical networks. Some specific topics that will be highlighted include tunable optical delay lines and optical performance monitoring.
A passive multi-resonant vertical-cavity nonlinear gate exploiting absorption saturation in semiconductor quantum wells is exploited to perform two-channel wavelength conversion using ASE light. Operation can be extended to a higher number of converted wavelengths.
We demonstrate label-rewriting function using 1times4 all-optical packet-switch that utilizes a highly scalable and asynchronous label processor. Results show that labels are successfully exchanged and the process causes only 0.5 dB power-penalty and error-free operation at 160 Gb/s.
A polymer-based coupled-ring reflector (CRR) is hybrid-integrated with R-SOA to realize a widely tunable laser diode. The wavelength tuning range is about 35 nm and SMSR is about 32 dB.
This paper analyses the impact of packet power variations in optical packet ring networks, and demonstrates the need for a distributed power equalisation to guarantee the quality of signal for each packet.
Cross gain modulation between two different optical signals, inserted through separate ports to an active MMI, has been experimentally measured. The observed trend of modulation reduction by increase of modulated signal power matches previous simulation results. An associated XPM is expected and could be optimized to enable using the active MMI in all-optical switching.
This paper overviews the recent progress and future prospects for photonic transport network technologies from the viewpoints of ROADM (reconfigurable optical add drop multiplexer) functional enhancement for improving the networking agility, expansion of the optical transparent domain, and advanced transmission technologies.
A compact optical memory with single SOA is demonstrated by exploiting two coupled fiber ring lasers. Without necessity of feedback, the memory shows bi-stability over a large wavelength range. Dynamic flip-flop operation is also investigated.
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