All-optical demultiplexing/shifting of 40-Gb/s OTDM optical signal using dual-pump wave mixing in bulk semiconductor optical amplifier

Optical Communications Systems

“…As a result of the simulation, the optimum input pump pulsewidth range is 1 ps ~ 3 ps for an input probe pulsewidth of 1 ps. In the experiments reported so far, 100 -6.3 Gbit/s (Kawanishi et al, 1994;Uchiyama et al, 1998), 200 -6.3 Gbit/s (Morioka et al, 1996, 40 -10 Gbit/s (Tomkos et al, 1999), and 100 -10 Gbit/s (Kirita et al, 1998) demultiplexing were performed. In our simulation/ modeling, we have considered the nonlinear effects, CD, CH and SHB with the recovery times of 200 ps, 700 fs, and 60 fs, respectively (Hong et al, 1996).…”

“…Four-wave mixing (FWM) in semiconductor optical amplifiers (SOAs) has several important features, such as, high speed and high FWM conversion efficiency as well as optical demultiplexing (DEMUX) (Mecozzi et al, 1995;Das et al, 2000). The are several applications of FWM in SOAs for all-optical devices, such as, wavelength converters (Vahala et al, 1996), optical samplers (Inoue & Kawaguchi, 1998), optical phase conjugators (Kikuchi & Matsumura, 1998) and optical multiplexers/demultiplexers (Kawanishi et al, 1997;Kawanishi et al, 1994;Morioka et al, 1996;Uchiyama et al, 1998;Tomkos et al, 1999;Kirita et al, 1998;Buxens et al, 2000) have been demonstrated for optical communication systems. When a pulse of a time-multiplexed signal train (for example, a probe pulse) and a pump pulse are injected simultaneously into an SOA, gain and refractive index in the SOA are modulated and an FWM signal is generated by the modulations.…”

“…All-optical demultiplexing has been experimentally demonstrated up to 200 Gbit/s (Morioka et al, 1996). Tomkos et al, (Tomkos et al, 1999) suggested a number of ways to improve the performance of the dual-pump demultiplexer at 40 Gbit/s as follows; adjustment of the input wavelengths at the peak gain wavelength of the SOA under saturation conditions, the use of higher pump power at the input of the device, or/and the use of pulsed pumps with short pulsewidths. For the higher bit-rate, the overlap of the input to the FWM signal pulses may appear both in the time and spectral domain.…”

Optical Demultiplexing Based on Four-Wave Mixing in Semiconductor Optical Amplifiers

“…As a result of the simulation, the optimum input pump pulsewidth range is 1 ps ~ 3 ps for an input probe pulsewidth of 1 ps. In the experiments reported so far, 100 -6.3 Gbit/s (Kawanishi et al, 1994;Uchiyama et al, 1998), 200 -6.3 Gbit/s (Morioka et al, 1996, 40 -10 Gbit/s (Tomkos et al, 1999), and 100 -10 Gbit/s (Kirita et al, 1998) demultiplexing were performed. In our simulation/ modeling, we have considered the nonlinear effects, CD, CH and SHB with the recovery times of 200 ps, 700 fs, and 60 fs, respectively .…”

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).…”