Optical time division multiplexing: systems and networks

Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source

“…However, one of the major problems associated with the reduced channel spacing and increased line rate is the more stringent characteristics that are imposed on the transmitter performance in terms of repetition rate, pulsewidth, jitter, side mode suppression ratio (SMSR), temporal pedestal suppression ratio (TPSR or extinction ratio) and chirp. For instance, a return-to-zero (RZ) optical transmitter designed to achieve satisfactory performance in a ≥ 40 Gb/s photonic communication system, needs to be capable of generating pulses with repetition rates of at least 10 GHz [3], pulsewidths of <8 ps (duty-cycle of ~1/3) [4], SMSR of at least 30 dB [5], TPSR greater than 30 dB [6] and a negligible chirp (transform-limited) [7]. Therefore, the design of an optimum optical transmitter is crucial, in that it has to be capable of generating pulses with adequate temporal and spectral purity for acceptable operation in high-speed optical communication systems.…”

Study on the limits of all-optical time-domain demultiplexing using cross-absorption modulation in an electroabsorption modulator

“…Optical time-domain multiplexed (OTDM) systems are a propitious way to increase the capacity of optical systems, without increasing the cost of using high-speed electronics [1]. A further increase in the channel speed to 160 Gbit/s or beyond will lead to a reduction in cost, because the number of required light sources is reduced and network management is simplified compared to a wavelength division multiplexing (WDM) system.…”

80-Gb/s OTDM System Analysis of a Vertical Microcavity-Based Saturable Absorber for the Enhancement of Pulse Pedestal Suppression

“…F UTURE high-speed communications systems are likely to employ optical time-division multiplexing (OTDM) due to simpler system configuration at increasing bit rates, relating to more cost-efficient systems [1]. One of the key components in such high-capacity OTDM systems is the picosecond optical pulse source, which should exhibit excellent temporal and spectral purity.…”