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In this work, the authors report on the demonstration of a monolithic semiconductor ring laser (SRL) as an all-optical set-reset flip-flop (SRFF). The SRL has a racetrack cavity, with 150 mum radius connecting two straight sections of 200 mum. Two straight output waveguides provide 4 input/output ports that can be used to inject/extract optical signals. The devices operate continuous wave at room...
Semiconductor ring lasers (SRLs) usually exhibit regimes of unidirectional operation, which offers a great potential for applications such as all-optical memories, switching and gating. In this paper, bistable semiconductor ring lasers of cavity lengths ranging from 1200 ??m up to 1900 ??m is fabricated. The devices were fabricated on a multiple quantum well AlGalnAs/InP wafer using a shallow etched...
A monolithic semiconductor ring laser is operated as an all-optical flip-flop with a response time of 100 ps. Bit-error-rate measurements of repeated set-reset switchings show error-free operation.
A monolithic semiconductor ring laser (SRL) is demonstrated as a fully all-optical flip-flop that can be triggered by optical pulses of 400 ps duration, showing 130 ps response time.
The frequency response and alpha factor of monolithic semiconductor ring lasers (SRLs) with 150 micron radius are measured using an all-optical modulation technique, yielding a -3 dB, frequency of 11 GHz and alpha factor of 2.4.
A monolithic semiconductor ring laser (SRL) is demonstrated to operate as an all-optical flip-flop that is triggered by optical pulses of 400 ps and 5 ps duration, showing a response time of 130 ps.
Summary form only given. Semiconductor ring lasers (SRLs) are promising devices for all-optical switching applications, as they can operate in a directional bistable regime where only one mode (clockwise or anti-clockwise) is active at one time. Directional switching can be triggered by the injection of an external optical signal pulse. We report on the design, fabrication, and characterization of...
Monolithic semiconductor ring lasers (SRLs) have the potential to simultaneously address two important issues of modern optoelectronic systems for high-speed optical communications: integrability and ultrafast all-optical signal processing. SRLs do not require chip cleaving or refractive index grating for the definition of the laser cavity, and hence they allow to integrate several laser devices on...
This paper reports on the fabrication and experimental characterization of index-guided semiconductor ring laser (SRLs) designed to operate on single transversal and longitudinal mode. Contrary to expectation, SRLs do not exhibit plain bidirectional CW operation for the two counterpropagating modes. Rather, they show an intricate and interesting regimes sequence, including, bidirectional operation...
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