A 300 nm× 450 nm× 5mm silicon nanowire is designed and fabricated for a four wave mixing based non-linear optical
gate. Based on this silicon nanowire, an ultra-fast optical sampling system is successfully demonstrated using a freerunning
fiber laser with a carbon nanotube-based mode-locker as the sampling source. A clear eye-diagram of a 320
Gbit/s data signal is obtained. The temporal resolution of the sampling system is estimated to 360 fs.
Dispersion compensating fiber (DCF) has seen considerable progress over the last decade and due to its well-controlled dispersion profile, high reliability and passive operation it has ecome the preferred method for compensating chromatic dispersion in today's optical communication systems. Raman amplification in fibers has found increased use in especially long-haul, high-capacity systems, mainly due to its low noise figure and versatile gain bandwidth. In this paper, we describe how Raman amplification can be used in DCF to realize discrete dispersion-compensating amplifiers, the so-called dispersion compensating Raman amplifier (DCRA). The main focus is on system applications and demonstrated results using DCRAs. These application include terminal compensation using DCRAs, hybrid amplifiers where the DCRA can be used to extend the dynamic range of existing erbium-doped fiber amplifiers (EDFAs), as well as hybrid EDFA/DCRAs with ultra wide gain bandwidth.
We demonstrate a 57.6-km-long linear photonic crystal fiber (PCF) transmission experiment using a recirculating loop with a 19.2-km PCF spool. A 10-Gbit/s non-return-to-zero signal was transmitted over PCF transmission fiber without dispersion compensation.
In the last decade Optical Time Division Multiplexed (OTDM) systems have attracted considerable interest, as an alternative to the existing commercially deployed Wavelength Division Multiplexed (WDM) systems. In this presentation, first the basic point-to-point bit interleaved OTDM system will be explained, with special focus on the transmitter and the receiver functionalities, demultiplexing and clock extraction. Some reported results are highlighted. In order to expand the system to include a number of nodes, channel identification is required, and a novel technique will be introduced. A simple network configuration is presented, exemplifying advantages and drawbacks of bit interleaved OTDM systems. Finally, a short introduction to reported results on packet based OTDM systems will be presented.
We demonstrate all-optical label encoding and updating for an orthogonally labeled signal in combined IM/FSK modulation format utilizing semiconductor lasers, semiconductor optical amplifiers and electro-absorption modulators. Complete functionality of a network node including two-hop transmission and all-optical label swapping is also experimentally demonstrated with overall penalty of less than 2 dB, proving the orthogonal IM/FSK labeling scheme to be a feasible solution for future optically labeled networks.
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