Optical Power Limiter Using a Saturated SOA-Based Interferometric Switch

Abstract

We demonstrate an optical power limiter using a semiconductor optical amplifier (SOA)-based interferometric gate powered by a strong continuous-wave input signal. We present a detailed theoretical and experimental investigation of the power limiting characteristics of saturated SOA-based switches, showing good agreement between theory and experiment.Index Terms-Limiter, optical signal processing, semiconductor optical amplifier (SOA), ultrafast nonlinear interferometer (UNI).

A method of developing frequency encoded multi-bit optical data comparator using semiconductor optical amplifier

“…Function of MZI-SOA as a two output ports (bar and cross ports) optical switch MZI-SOA based all-optical switch is also very promising for present day's optical signal processing and data processing because of its thermal stability, compactness in size with low power consumption and low time delay in operation. The switching action of MZI-SOA can be exploited to develop a frequency encoded optical comparator unit [18,[25][26][27][28]. Here the switching action of 'MZI-SOA' routes a signal of specific frequency from one port to another port with the help of a control beam of another specific frequency.…”

Data regeneration for an all‐photonic digital radio over fibre

“…The attenuated signal of power P ′ S (t) is fed to the reshaping block that consists of a hard limiter [10][11][12][13][14] and Gaussian filter blocks. At the hard limiter block, if the input sampled power is greater than a threshold value given by P th , the output power value of the hard limiter, P L (t), is 'one', otherwise it is 'zero' [15] …”

“…The resulting retimed optical pulses are amplified by an erbium doped fibre amplifier (EDFA), denoted by G3 in Fig. 4b, and fed into an optical power limiter [12][13][14], the output of which is fed to an optical Gaussian filter (OGF2) to perform the pulse reshaping process. In the simulated model, the splitter, Sp, is 50/50 and in time stretching block T d is about 1.4 ps, the length of fibre L1 is about 100 m. The attenuation of fibre L1 is about 0.2 dB/km.…”

A novel method of developing all-optical frequency encoded memory unit exploiting nonlinear switching character of semiconductor optical amplifier

“…The switching action of SOA-MZI can be exploited to develop a frequency encoded memory unit [13][14][15][16][17]. Here the switching action of SOA-MZI routes a signal of specific frequency from one port to another port with the help of a control beam of another specific frequency.…”