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Optical isolators based on non-reciprocal optical elements are crucial to protect laser sources from unwanted back-reflections. Commercial optical isolators are built using bulk components and micro-optics technology, and contribute a large fraction of the overall manufacturing cost of a telecom laser. Despite the impressive development in photonic integration techniques, the integration of non-reciprocal...
Generation of stable and tunable mm-wave and THz signals is extremely attractive for applications including tomography, gas sensing and imaging for security systems. Currently photonic methods for generating signals at these frequencies show either very limited tunability, as in the case of passively mode-locked lasers and THz quantum cascade lasers [1], or poor spectral purity, evinced in the photomixing...
A monolithic semiconductor ring laser is operated as an all-optical set-reset flip-flop triggered by external optical pulses. Bit-error-rate measurements of set-reset switchings under the injection of a pseudo-random-bit-sequence have been performed, showing reliable operation up to 10 Gb/s.
A set of passively mode-locked Distributed Bragg Reflector lasers on a single chip, are shown to exhibit stable mode-locking across a 40nm bandwidth. Integration of two gratings in a single device shows dual band locking.
An integrated monolithic device where two DFB lasers are phase-locked via mutual injection, assisted by a Four-Wave-Mixing process that takes place in an auxiliary DFB, generates a spectrally pure tunable mm-wave signal.
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...
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.
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.
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