Abstract-An integrated InP-InGaAsP two-state coupled-laser device for use in optical packet switching and signal processing is presented. The two states are identified by distinct lasing wavelengths. Single-mode lasing occurs in both states and the contrast ratio between the two states is 35 dB. Switching between states with optical pulses is demonstrated. The use of an arrayed waveguide grating (AWG) and ring laser configuration permits monolithic integration without the need for cleaved facets. How the AWG can be used to obtain partial isolation between multiple interconnected devices is also discussed.
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Two active Mach-Zehnder interferometers are integrated in a monolithic InP/InGaAsP photonic integrated circuit. Together they form a crucial component for optical signal processing: an optical memory element or set-reset flip-flop. The switching time for this initial device is approximately 200 ps. The photonic integrated circuit contains active and passive optical components, including electro-optic phase shifters.
DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers.
Link to publication
General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
We demonstrate a hybrid radio-optical wireless communication system using a photonic integrated all-opticalcross-connect (OXC) chip to realize a highly reconfigurable and reliable bidirectional indoor wireless network which provides the ultimate capacity per user. By remote wavelength-tuning, narrow optical beams are directed to the users employing a passive 2D beam steering module fixed at the ceiling in each room. Robustness regarding line-of-sight issues is achieved by implementing 60-GHz radio protection channels generated optically using a shared amplitude modulator via the OXC chip. The use of a 35 GHz reflective electroabsorption modulator (REAM) monolithically integrated with a semiconductor optical amplifier (SOA) chip is proposed for upstream wideband analog applications. The REAM-SOA provides similar performances as a REAM, but over a wide range of input optical powers and wavelengths. This mitigates the need for accurate control of the input signal, especially at remote sites where simplicity is strictly required. System experiments showed downstream optical-wireless transmission capacities of up to 35 Gb/s per user and 60-GHz protection channels with a capacity of 20 Gb/s. Upstream RoF transmission rates of more than 35 Gb/s have also been achieved.
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