We present a fully integrated 12.5-Gb/s optical receiver fabricated with standard 0.13-µm complementary metal-oxide-semiconductor (CMOS) technology for 850-nm optical interconnect applications. Our integrated optical receiver includes a newly proposed CMOS-compatible spatially-modulated avalanche photodetector, which provides larger photodetection bandwidth than previously reported CMOS-compati...

In this thesis, we study all-optical processing techniques based on non-linear semiconductor optical amplifiers for the functionalities of second and third generation optical networks. In particular, devices for all-optical wavelength conversion with regenerative properties have been investigated. The configurations under investigation are based on the non-linear four-wave mixing process which ...

We investigated the performance of RAMAN-EDFA, RAMAN-SOA, EDFA-SOA hybrid Amplifiers in 120 channel WDM systems with each channel having data rate 10 Gbps at reduced channel spacing of 50 GHz. The performance has been compared on the basis of different fiber length at dispersion equal to 2 ps/nm/km in terms of Qfactor, BER and Eye opening. The results showed that RAMAN – EDFA provides the highe...

Future ultra high bit-rate optical time division multiplexed (OTDM) systems may require all-optical demultiplexing to down convert high bit-rate data to e.g. 10 Gbit/s or 40 Gbit/s where electronic circuits can be used. Many suggestions of such demultiplexers have been proposed over the years. The most common device is the nonlinear optical loop mirror (NOLM) that allows switching due to cross ...

The characteristics of a semiconductor laser operating in the threshold region are investigated systematically. In this transition region from below to above threshold, the linewidth versus injection current characteristic is found to be nonmonotonic: a local minimum of linewidth just below threshold and a local maximum just above threshold are confirmed experimentally. If a semiconductor laser...

All-optical flip-flops are key components for photonic digital processing in next generation optical networks and optical computing. In most digital applications signals synchronization with an external reference clock is a basic feature. In this paper an entire set of all-optical clocked flip-flops, including SR, D, T, and JK types is proposed and demonstrated. Each configuration employs a sin...

In this letter, we address one of the essential processes to consider in long Semiconductor Optical Amplifiers (SOAs) analysis, which is the noise. Particularly, we investigate the impact of noise effects on the SOA behavior by measuring the gain, the optical signal to noise ratio and the noise figure, referring to numerical simulations. Although its gain dynamics provide very attractive featur...