Compensation fibre chromatic dispersion by optical phase conjugation in a semiconductor laser amplifier

The impact of parametric noise amplification on long haul transmission throughput

“…Figure 2a compares the performance of a selection of these devices for two key parameters, the achieved channel count determining the number of devices require for a system, and the conversion efficiency which determines the ASE noise penalty. High channel counts have been observed for PPLN devices [29] where crosstalk is low, and for dispersion engineered optical fibres [24][25][26][27][28]. Positive conversion efficiencies have only been observed for fibre devices acting as parametric amplifiers and employing SBS suppression techniques [23][24][25], however, parametric gain has recently been reported in a PPLN device [35].…”

“…Positive conversion efficiencies have only been observed for fibre devices acting as parametric amplifiers and employing SBS suppression techniques [23][24][25], however, parametric gain has recently been reported in a PPLN device [35]. Data points are taken from [24][25][26][27][28][29][30][31][32][33][34][35]. Figure 2b illustrates the achieved performance improvements for systems employing both OPC and coherent detection, alongside the anticipated theoretical performance enhancement.…”

“…In this section, we briefly review progress in OPC device and system development, concentrating on systems employing coherent detection [22]. OPCs have been fabricated from a wide variety of materials including fibre [23][24][25][26][27][28], bulk [29] and quantum dot [30] semiconductor optical amplifiers, periodically poled lithium niobate (PPLN) [31], silicon [32], soft glass [33] and using opto-electronic devices [34]. Figure 2a compares the performance of a selection of these devices for two key parameters, the achieved channel count determining the number of devices require for a system, and the conversion efficiency which determines the ASE noise penalty.…”

Optical Phase-Conjugation of Picosecond Four-Wave Mixing Signals in SOAs

“…The application of four-wave mixing (FWM) in semiconductor optical amplifiers (SOAs) has been widely demonstrated to all-optical devices, such as wavelength converters (Vahala et al, 1996;Nesset et al, 1998), optical samplers , optical multiplexers/ demultiplexers (Kawanishi et al, 1997;Uchiyama et al, 1998;Tomkos et al, 1999;Buxens et al, 2000;Set et al, 1998), and optical phase conjugators (Dijaili et al, 1990;Kikuchi & Matsumura, 1998;Marcenac et al, 1998;Corchia et al, 1999;Tatham et al, 1993;Ducellier et al, 1996), which are expected to be used in future optical communication systems. Kikuchi & Matsumura have demonstrated the transmission of 2-ps optical pulses at 1.55 µm over 40 km of standard fiber by employing midspan optical phase conjugation in SOAs (Kikuchi & Matsumura, 1998).…”

Optimization of DSF- and SOA-based phase conjugators by incorporating noise-suppressing fiber gratings

“…The two most promising optical phase conjugation techniques are four-wave mixing (FWM) in either dispersion-shifted fibre (DSF) [1], [2] or semiconductor optical amplifiers (SOA) [3], [4]. A DSF based conjugator requires phase matching close to its zero dispersion wavelength for efficient four-wave mixing [5].…”