Multilayer equalizer for 2-channel OTDM-PAM-8 transmission system

Bae, Seok; Lee, Yonghae

doi:10.1016/j.optcom.2023.129420

Cited by 2 publications

(4 citation statements)

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“…The 3 dB bandwidth of the receiver was set to 25 GHz. Figure 7a shows the BERs depending on the sampling position when using a symbolspaced demultiplexer and a MIMO equalizer [29]. The received optical power was −1 dBm under the back-to-back condition.…”

Section: Experimental Results Obtained Using a Multilayer Equalizermentioning

confidence: 99%

“…A multilayer equalizer for the two-channel OTDM system was proposed to reduce the BER floor (crucial when a higher-order modulation-formatted signal is used), as shown in Figure 6a [29]. The optical transmitter is identical to that shown in Figure 1.…”

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

“…where x in [k] denotes a sequence consisting of half-symbol-spaced samples (i.e., 2 are alternatively applied to the OTDM signal to reconstruct the RZ1 signal, x out,1 [k], and RZ2 signal, x out,2 [k], respectively [29]. h 1 and h 2 can be interpreted as matched filters that maximize the SINAD.…”

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

“…where D 2 denotes a constant representing a delay, M 1 and M 2 denote constants determining the tap length, w r denotes the r-th order filter coefficient, and x[k] and y[k] represent the k-th input and output of the equalizer, respectively [29]. A parameter vector M = [M 1 , M 2 ] can be introduced for convenience.…”

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

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Two-Channel OTDM System for Data-Center Interconnects: A Review

Bae

Kim

2023

Sensors

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It has been proposed to implement the >100 Gb/s data-center interconnects using a two-channel optical time-division multiplexed system with multilevel pulse-amplitude modulation. Unlike the conventional four-channel optical time-division multiplexed system which requires an expensive narrow pulse, the two-channel system can be implemented cost-effectively using a wide pulse (which can be simply generated using a single modulator). The two-channel system is expected to be practically available using an integrated transmitter in a chip due to the recent advances in photonics-integrated circuits. This paper reviews the current stage of research on a two-channel optical time-division multiplexed system and discusses possible research directions. Furthermore, it has been demonstrated that 200 Gb/s signals can be generated by using modulators with only 17.2 GHz bandwidth. Therefore, the use of the phase-alternating pulse can make the multiplexed signal robust to chromatic dispersion, enabling the 200 Gb/s 4-level pulse-amplitude-modulated signal to be transmitted over 1.9 km of standard single-mode fiber.

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Section: Experimental Results Obtained Using a Multilayer Equalizermentioning

confidence: 99%

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

Section: Otdm System Using a Multilayer Equalizermentioning

confidence: 99%

See 2 more Smart Citations