Optimisation of carrier-to-sideband ratio by triple-arm Mach–Zehnder modulators in radio-over-fibre links

Zhao, Jiangong; Liu, Z.J.; Liu, X.L.; Shang, Tao; Yue, Peng

doi:10.1049/iet-opt.2009.0081

Cited by 14 publications

(12 citation statements)

References 9 publications

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“…The OCSR is continuously tunable by simply controlling the bias voltages of the lower modulator. Compared with the [19,23,27,28], the OCSR of the proposed method has a wider range, a better stability. The footprint of the proposed OSSB signal generator is much smaller than alternative techniques.…”

Section: Resultsmentioning

confidence: 99%

“…The receiver sensitivity could be enhanced by simply optimizing the OCSR to improve the performance of the entire system [23][24][25]. Up to now, several approaches have been verified to achieve the OSSB modulation with tunable OCSR based on an OSSB generator incorporating with a narrow band notch FBG or a polarization maintaining fiber Bragg grating (PM-FBG) [23] or a DPMZM combining with a 90-degree phase shifter [26] or optical injection-locked laser [27] or multimode interference coupler and three optical phase-modulator waveguides [28]. However, the working bandwidth for the PM-FBG-based method is limited and the system has a poor long-term stability and is wavelength dependent.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the OCSR is continuously tunable by simply adjusting the bias voltages of the lower arm modulator. Compared with the [19,23,27,28], the OCSR of the proposed method has a wider range, a better stability, and a smaller footprint. The frequency shifting optical signal from the upper modulator and the optical carrier from the lower modulator are combined together at the output of the DP-QPSK modulator with orthogonal SOP.…”

Section: Introductionmentioning

confidence: 99%

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Phase-coherent orthogonally polarized optical single sideband modulation with arbitrarily tunable optical carrier-to-sideband ratio

Wang¹,

Liu²,

Mei³

et al. 2016

Opt. Express

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We propose and experimentally verify a novel approach to achieve phase-coherence orthogonally polarized optical single sideband (OSSB) modulation with a tunable optically carrier-to-sideband ratio (OCSR). In our scheme, the orthogonally polarized OSSB signal is achieved using a dual-polarization quadrature phase shift keying (DP-QPSK) modulator without an optical band-pass filter (OBPF). Therefore, the proposed method is wavelength independent. The DP-QPSK modulator includes two parallel QPSK modulators locating on its two arms. The upper QPSK modulator of the DP-QPSK modulator is driven by two quadrature sinusoidal microwave signals and works at the frequency shifting condition whose bias voltages are optimized to suppress the optical. The lower QPSK modulator of that works at the maximum transmission point and the optical carrier is not modulated. The OCSR is continuously tunable by simply adjusting the bias voltages of the lower modulator. The frequency shifting optical signal from the upper QPSK modulator and the optical carrier from the lower QPSK modulator are combined together at the output of the DP-QPSK modulator. The optical carrier and sideband are polarized orthogonally. The generated OSSB signals could be used to shift and code the phase of the microwave signal and generate ultra-wideband (UWB) microwave pulse. The proposed method is analyzed and experimental demonstrated.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase-coherent orthogonally polarized optical single sideband modulation with arbitrarily tunable optical carrier-to-sideband ratio

Wang¹,

Liu²,

Mei³

et al. 2016

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Three identical PMs can be connected in parallel to realize the threearm MZM in Figure 1. With the development of integrated optics and the emergence of research on three-arm MZMs [17,18], the three-arm MZM may be commercially available as a traditional two-arm MZM, especially when its applications and advantages are widely recognized.…”

Section: Non-ideal Splitting Ratiomentioning

confidence: 99%

A Photonic mm-Wave Frequency Sextupler Using an Integrated Mach–Zehnder Modulator with Three Arms

Chen

Wen

Yin

et al. 2012

Fiber and Integrated Optics

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A novel photonic mm-wave frequency sextupling scheme based on an integrated Mach-Zehnder modulator with three arms is proposed in this article. Without any optical filter, a high-quality frequency sextupling mm-wave signal can be generated. Compared with mm-wave generation schemes based on traditional two-arm Mach-Zehnder modulators, the proposed scheme does not need DC bias and a complex electrical bias control circuit. Some non-ideal factors are taken into consideration to verify its performance, which proves that a slight deviation of the ideal values does not cause great degradation of the performance of the mm-wave generation scheme.

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“…In the past two decades or so, there has been a plethora of publications [1][2][3][4][5][6][7][8][9] in the field of microwave photonics that have described essentially the same generalized Mach-Zehnder Interferometer (MZI) circuit architecture: a 1 × N splitter directly interconnected to a N × 1 combiner via an array of N linear electro-optic phase modulators, each circuit adapted to particular design goals. The applications have generally been to single-side-band (SSB) modulation or electro-optic microwave carrier frequency multiplication.…”

mentioning

confidence: 99%

Dual-function photonic integrated circuit for frequency octo-tupling or single-side-band modulation

2015

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A dual-function photonic integrated circuit for microwave photonic applications is proposed. The circuit consists of four linear electro-optic phase modulators connected optically in parallel within a generalized Mach-Zehnder interferometer architecture. The photonic circuit is arranged to have two separate output ports. A first port provides frequency up-conversion of a microwave signal from the electrical to the optical domain; equivalently single-side-band modulation. A second port provides tunable millimeter wave carriers by frequency octo-tupling of an appropriate amplitude RF carrier. The circuit exploits the intrinsic relative phases between the ports of multi-mode interference couplers to provide substantially all the static optical phases needed. The operation of the proposed dual-function photonic integrated circuit is verified by computer simulations. The performance of the frequency octo-tupling and up-conversion functions is analyzed in terms of the electrical signal to harmonic distortion ratio and the optical single side band to unwanted harmonics ratio, respectively.

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Optimisation of carrier-to-sideband ratio by triple-arm Mach–Zehnder modulators in radio-over-fibre links

Cited by 14 publications

References 9 publications

Phase-coherent orthogonally polarized optical single sideband modulation with arbitrarily tunable optical carrier-to-sideband ratio

Phase-coherent orthogonally polarized optical single sideband modulation with arbitrarily tunable optical carrier-to-sideband ratio

A Photonic mm-Wave Frequency Sextupler Using an Integrated Mach–Zehnder Modulator with Three Arms

Dual-function photonic integrated circuit for frequency octo-tupling or single-side-band modulation

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