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Dynamic all-optical flip-flop operation is observed for a single distributed feedback laser diode using the spatial hole burning effect. Bistabilities with extinction ratios of up to 35 dB are obtained. For the flip-flop operation, we demonstrate repetition rates up to 1.25 GHz using pulses of 0.5 pJ.
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.
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.
We developed a unique and simple two-way optical transmission system in which each Si photo-diode plays two roles of photo-receiver and light-emitting diode. Such a system may lead to realization of fully monolithic Si OEIC.
We report an experimental demonstration of prototype all-optical flip-flop operation of a conventional cylindrical shaped 1.55-mum wavelength single-mode vertical cavity surface emitting laser (VCSEL) based on polarization-switching under external laser beam injection. Two injection beams with orthogonal polarizations were used to control the output beam pattern of the slave VCSEL. The polarized beam...
Three-electrode-type self-pulsating (SP) distributed feedback (DFB) laser diodes (LDs) were fabricated. Lasing mode selectivity and pulsating frequency of SP-DFB LDs were investigated experimentally and device parameter dependences were well explained by numerical simulations.
A coupled ring reflector laser diode is successfully fabricated and it is demonstrated that the laser diode can provide about 10 nm tuning with a side mode suppression ratio exceeding 20 dB.
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