Photonic DPASK/QAM signal generation at microwave/millimeter-wave band based on an electro-optic phase modulator

Abstract

We have proposed and experimentally demonstrated two novel photonic architectures to generate differential-phase amplitude-shift keying and circular quadrature amplitude modulation signals at microwave/millimeter-wave band based on an electro-optic phase modulator. In our proposed schemes, the electronic driven circuits were greatly simplified by employing the photonic vector modulation technique.

All-Optical Double Spectral-Efficient RoF Link With Compensation of Dispersion-Induced Power Fading

“…Nowadays, RoF links with higher spectral efficiency are needed to make full utilization of finite frequency spectrum resources. Therefore, it is significant to transmit high spectral-efficient microwave vector signals such as quadrature amplitude modulation (QAM) and phase-shift keying (PSK) signals on a single fiber [3].…”

Photonic generation of microwave frequency shift keying signal using a single-drive Mach–Zehnder modulator

“…Recently, photonic generations of microwave signals with different modulation formats, including amplitude shift keying (ASK), phase shift keying (PSK), and high-order modulation formats, have attracted increasing attentions [6][7][8][9][10][11][12][13][14][15][16][17][18]. In Ref [6,7], optical carrier suppression (OCS)-ASK signal can be used to generate microwave ASK signal.…”

“…Moreover, photonic generation of phase-coded microwave signal has been proposed in optical domain, which can reduce the system complexity and increase the RF frequency of the generated signal [8][9][10][11][12][13]. High-order modulation formats, such as microwave amplitude differential phase shift keying (ADPSK), quaternary phase shift keying (QPSK), and quadrature amplitude modulation (QAM) signals, have been demonstrated by using MWP [14][15][16][17]. However, microwave frequency shift keying (FSK) signal as a fundamental digital modulation format in wireless communication has rarely been realized through photonic technology.…”

Photonic vector signal generation employing a novel optical direct-detection in-phase/quadrature-phase upconversion

“…Furthermore, to generate an RF vector signal in a high-frequency band, an electrical mixer with a typical conversion loss of more than 8 dB is required to upconvert vector signals to an intermedium or RF, which degrades the performance of the upconverted RF vector signals, especially at the higher frequency. Recently, the generation of optical RF signals by all-optical upconversion has been extensively investigated [2][3][4][5][6][7][8][9]. However, the corresponding system requires at least two modulators to upconvert the in-phase (I) and quadrature-phase (Q) signals and occupies much more optical bandwidth than traditional DSB and SSB modulation schemes [4][5][6][7][8].…”

“…Recently, the generation of optical RF signals by all-optical upconversion has been extensively investigated [2][3][4][5][6][7][8][9]. However, the corresponding system requires at least two modulators to upconvert the in-phase (I) and quadrature-phase (Q) signals and occupies much more optical bandwidth than traditional DSB and SSB modulation schemes [4][5][6][7][8]. Moreover, [9] needs a local oscillator for homodyne or heterodyne detection, which is not practical for access applications.…”