Analog Photonic Link With Tunable Optical Carrier to Sideband Ratio and Balanced Detection

Gao, Yongsheng; Wen, Aijun; Peng, Zhengxue; Tu, Zhaoyang

doi:10.1109/jphot.2017.2667891

Cited by 18 publications

(8 citation statements)

References 21 publications

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“…Some slightly complex methods have been reported for achieving the SNR optimization goal [6], [7], [11]. These methods include DMZM with tunable optical filter, using polarization modulators, optical injection locked laser based technique, etc.…”

Section: Experimental Validationmentioning

confidence: 99%

“…To maximize the SNR of the OSSB based RoF link, the optimization of optical carrier to sideband ratio (OCSR) at 0 dB is important [6], [7]. Generally, to generate the OSSB scheme either an electro optic modulator along with an optical filter, or a dual electrode modulator (DMZM) is used [8], [9].…”

Section: Introductionmentioning

confidence: 99%

“…1.1 we will show the generation method of the OVSB and OSSB scheme using the series MZM and PM configuration. Also, we describe how OVSB method is advantageous to optimize the SNR of the link in comparison to the OCSR = 0 dB method of [6], [11]. Section 2 gives the clear analytical description on the OSSB and OVSB generation method using the series MZM and PM configuration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel Vestigial Sideband Modulation Scheme to Enhance the SNR in Radio Over Fiber Systems

Udvary¹,

Parajuli²

2017

RADIOENGINEERING

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show abstract

Section: Experimental Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Vestigial Sideband Modulation Scheme to Enhance the SNR in Radio Over Fiber Systems

Udvary¹,

Parajuli²

2017

RADIOENGINEERING

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show abstract

“…Usually, the frequency-octupling signal can be generated by a DP-MZM, however the signal suffers from a low optical sideband suppression ratio (OSSR) because of the finite extinction ratio of the DP-MZM [17]. A DP-QPSK modulator is an integrated modulator that can flexibly generate different forms of optical signals and has been widely used in recent reports [18,19]. The proposed scheme consists of a DP-QPSK modulator, a tunable laser source (TLS) and an I/Q modulator-based Sagnac loop.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Octupling Millimeter-Wave Optical Vector Signal Generation via an I/Q Modulator-Based Sagnac Loop

Yang

Qu²,

Liu

2019

Symmetry

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A new method for generating frequency-octupling millimeter-wave (mm-wave) vector signals in optical fields via a Sagnac loop is proposed. In this scheme, two orthogonally polarized fourth order sidebands can be obtained through an integrated dual-polarization quadrature phase shift keying (DP-QPSK) modulator. The two optical sidebands are sent into an I/Q modulator-based Sagnac loop. The I/Q modulator is modulated by a 16QAM baseband signal. In the Sagnac loop, one of the sidebands is modulated by the baseband vector signal along one direction, and the other sideband is unmodulated along the opposite direction because the I/Q modulator has the traveling-wave nature. Thanks to this modulation property and the symmetrical structure of the Sagnac loop, a frequency-octupling mm-wave vector signal that is free from interband beating and fiber chromatic dispersion interference can be generated by the photodetector (PD). After simulating a 20 km single-mode fiber (SMF) transmission, the generated frequency-octupling vector signal was good in function.

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“…Compared with pure RF phase shifters, the photonics-assisted ones have the advantages of immunity to electromagnetic interference [10]- [18], full 360°phase shifts [10]- [17], large bandwidth [10]- [18], high resolution and good system flexibility due to programmable optical signal processor [16], [17]. However, these optically-controlled microwave phase shifters do not support super-octave applications due to the spectra overlapping between fundamental signals and their second-order distortions (SDs) [19], [20]. SDs include secondorder intermodulation distortion (IMD2) and second-order harmonic distortion (SHD).…”

Section: Introductionmentioning

confidence: 99%

Photonics-Assisted Super-Octave Microwave Phase Shifter

et al. 2019

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A photonics-assisted super-octave microwave phase shifter is proposed. The super-octave frequency range is achieved by eliminating the second-order distortions (SDs) with the techniques of polarization interleaving and second-order optical sidebands (2-OSBs) phase processing. Polarization interleaving is based on a polarization-multiplexing dual-drive Mach-Zehnder modulator (PM-DMZM) and single sideband with carrier (SSB+C) modulation. 2-OSBs phase processing is implemented by introducing opposite phase shifts to the ±2-OSBs in a Fourier-domain optical processor (FD-OP). The proposed phase shifter is experimentally verified by proof-of-concept experiments. Experimental results show that flat phase shifts cover a full 360°range with less than 3-dB power variation over 11.5-25 GHz. Besides, excellent long-term stability is presented with a maximum phase/power fluctuation of only 1.49°/0.57 dB. Compared with the conventional FD-OP-based photonic microwave phase shifter, the proposed one improves the second-order spurious free dynamic range (SFDR 2) by 13.57 dB.

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Analog Photonic Link With Tunable Optical Carrier to Sideband Ratio and Balanced Detection

Cited by 18 publications

References 21 publications

Novel Vestigial Sideband Modulation Scheme to Enhance the SNR in Radio Over Fiber Systems

Novel Vestigial Sideband Modulation Scheme to Enhance the SNR in Radio Over Fiber Systems

Frequency-Octupling Millimeter-Wave Optical Vector Signal Generation via an I/Q Modulator-Based Sagnac Loop

Photonics-Assisted Super-Octave Microwave Phase Shifter

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