Patent · US Active

PAM4 signal generation apparatus

US10110402B2 · kind B2 · utility

1Cited by

2References

12Claims

0Family size

Assignee

Hisilicon Optoelectronics Co., Limited · CN

Inventors

Hongmin Chen · Athens, US
Zhenwei Cui · 红钢城街道, CN
Xi Huang · Hubei, CN

Key dates

Filing date	Dec 28, 2017
Grant date	Oct 23, 2018
Priority date	—
Expiry date	Dec 28, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/0008
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A PAM4 signal generation apparatus is provided. The PAM4 signal generation apparatus includes a DFB, two EA modulators, an SOA, a PSR, a direct-current power source, two electrical-signal generators, and two amplitude-limiting amplifiers. The two electrical-signal generators and the two amplitude-limiting amplifiers are used to generate two NRZ electrical signals respectively, the DFB outputs two optical signals, the SOA amplifies an optical power of one of the optical signals, the two EA modulators use the NRZ electrical signals and the optical signals including “a large signal and a small signal” respectively to generate two NRZ optical signals respectively, and the two NRZ optical signals are multiplexed by the PSR to generate a PAM4 electrical signal. According to this apparatus, a linearity requirement is greatly lowered. PAM4 modulation is performed in an optical domain, and this prevents a PAM4 signal from being generated on an electrical signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.