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Abstract
A novel Terahertz-wave (THz-wave) generation on the strength of optical frequency comb and single push-pull Mach-Zehnder modulator (MZM) with a pair of transmitter and receiver in 0.4-THz band is proposed. The advantages of the optical frequency comb based on phase modulator (PM) 1 and PM2 in series includes the uncomplicated operation and good stability to produce numerous subcarriers at 25-GHz intervals. THz-wave is generated based on two comb lines derived from the same optical frequency comb. One comb line is used as an optical local oscillator (LO) and the other is served as signal carrier for data modulation for heterodyne mixing. We investigate the generation and transmission of a 0.4 THz THz-wave signal carrying 4 Gbaud quadrature-phase-shift-keying (QPSK) or 1 Gbaud 16 quadrature amplitude modulation (16-QAM) data over back-to-back (BTB) transmission or 10 km standard single-mode fiber (SSMF) transmission, with the bit-error-rate (BER) performance below the hard decision forward error correction (HD-FEC) threshold of 3.8e-3.
Highlights
With the rapid expansion of the wireline and wireless communication in the last few decades, the photonic-assisted THz-wave (0.3 THz–10 THz) is gradually becoming a potential choice to supply large bandwidth and long-distance high-capacity services to meet the urgent requirements [1]–[4]
We investigate the generation and transmission of a 0.4 THz THz-wave signal carrying 4 Gbaud quadrature-phase-shift-keying (QPSK) or 1 Gbaud 16 quadrature amplitude modulation (16-QAM) data over back-to-back (BTB) transmission or 10 km standard single-mode fiber (SSMF) transmission, with the bit-error-rate (BER) performance below the hard decision forward error correction (HD-FEC) threshold of 3.8e-3
We investigate the generation and transmission of a 0.4 THz THz-wave signal carrying 4 Gbaud QPSK and 1 Gbaud 16-QAM data over back-to-back transmission or 10 km SSMF transmission, with the BER performance below the HD-FEC threshold of 3.8e-3
Summary
With the rapid expansion of the wireline and wireless communication in the last few decades, the photonic-assisted THz-wave (0.3 THz–10 THz) is gradually becoming a potential choice to supply large bandwidth and long-distance high-capacity services to meet the urgent requirements [1]–[4]. In the remote heterodyne technique, two light carriers of different wavelengths generated from two separate lasers, and the fixed THz-wave can be obtained after passing through the beat frequency of the optical detector and the high speed baseband signal can be transparently loaded onto the THz-wave carrier [4]–[9], [15]–[20] It is based on multiple free running lasers, the frequency interval of lasers and their phases float on their own, phase noise regulation procedure at receiver end is required to be processed in DSP, which contributes to the increase of the processing time and system complexity [21]. There are few works on the generation of the THz-wave based on optical frequency comb and single push-pull MZM before
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