Improving the dynamic range of a coherent AM analog optical link using a cascaded linearized modulator

Sabido, IX D.J.M.; Tabara, M.; Fong, T.K.; Lu, Chenggang; Kazovsky, L.G.

doi:10.1109/68.393215

Cited by 33 publications

(11 citation statements)

References 9 publications

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“…Samples of the results obtained are shown in Table 1 for different values of the parameters τ 1 and τ 2 . Using equation (4) and the parameters in Table 1, the normalized output-power was calculated and compared to equation (2). The results show that very small values of the relative root-meansquare (RRMS) errors given by equation (5) can be achieved.…”

Section: Proposed Mathematical Modelmentioning

confidence: 98%

“…According to [9], in the absence of loss in the resonators, the transfer function of the 2R-MZI can be described by equation (2).…”

Section: Proposed Mathematical Modelmentioning

confidence: 99%

“…In order to minimize the unwanted harmonics and intermodulation components at the output of the EOM based on interferometer schemes, several attempts have been made to linearize its transfer characteristic of equation (1); see for example references [1][2][3][4][5][6][7][8][9][10][11] and the references cited therein. Of particular interest here is the technique based on combining a Mach-Zehnder interferometer and a double-microring allpass filter in one of its arms (2R-MZI) [9].…”

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confidence: 99%

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Large Signal Analysis of the Mach-Zehnder Interferometer with One Arm Loaded with a Second-Order Allpass Double-Microring Resonator

Abuelma’atti

2008

J Infrared Milli Terahz Waves

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A mathematical model for the transfer function of the Mach-Zehnder interferometer with one arm loaded with a second-order allpass double-microring resonator (2R-MZI) is presented. The model, basically a sine-series function, can easily yield closedform expressions for the amplitudes of the harmonic and intermodulation components of the output when the input is formed of large-amplitude multisinusoidal RF voltage. The special case of two-tone equal-amplitude RF input voltage is considered in detail. The results show that the third-order intermodulation component is always higher than the thirdharmonic component. The results also show the extensive improvement in the linearity of the Mach-Zehnder interferometer with one arm loaded with a second-order allpass microring resonator. Compared with the standard Mach-Zehnder interferometer, the results show that a sharp reduction of 80 dB in the third-order intermodulation can be achieved.

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Section: Proposed Mathematical Modelmentioning

confidence: 98%

“…According to [9], in the absence of loss in the resonators, the transfer function of the 2R-MZI can be described by equation (2).…”

Section: Proposed Mathematical Modelmentioning

confidence: 99%

mentioning

confidence: 99%

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Large Signal Analysis of the Mach-Zehnder Interferometer with One Arm Loaded with a Second-Order Allpass Double-Microring Resonator

Abuelma’atti

2008

J Infrared Milli Terahz Waves

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“…Optical linearization can be employed to overcome the limitation. Those techniques include the use of a dual-cascaded linearized modulator [6], an MZM operating at the opposite slopes of the transfer functions for two different wavelengths [7], [8] and a pair of parallel MZMs operating at opposite slopes of the transfer functions [9]- [12]. The major limitation of the techniques in [6]- [12] is that a pair of MZMs, two high-quality laser sources or a pair of balanced photodetectors (PDs) are needed, which will increase the cost of the whole system.…”

Section: Introductionmentioning

confidence: 99%

“…Those techniques include the use of a dual-cascaded linearized modulator [6], an MZM operating at the opposite slopes of the transfer functions for two different wavelengths [7], [8] and a pair of parallel MZMs operating at opposite slopes of the transfer functions [9]- [12]. The major limitation of the techniques in [6]- [12] is that a pair of MZMs, two high-quality laser sources or a pair of balanced photodetectors (PDs) are needed, which will increase the cost of the whole system. To reduce the cost, a single lithium-niobate phase modulator (PM) which supports two polarization modes (TE mode and TM mode) with different anisotropic electrooptic coefficients is used to fully cancel the third-order intermodulation (IM3) [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Microwave Photonic Link With Improved Dynamic Range Using a Polarization Modulator

Chen

Yao

2013

IEEE Photon. Technol. Lett.

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A microwave photonic link (MPL) using a single polarization modulator (PolM) with an improved spurious free dynamic range (SFDR) is proposed and experimentally demonstrated. The proposed MPL is designed based on the destructive combination of the distortion signals in the electrical domain, which is realized using a PolM with its output split into two channels. In the upper channel, the PolM, a polarization controller (PC), and a polarization beam splitter (PBS) form an equivalent Mach-Zehnder modulator (MZM) that is biased at the quadrature point. The optical carrier is suppressed using a phaseshifted fiber Bragg grating (PS-FBG). In the lower channel, the PolM, another PC, and the PBS form a second equivalent MZM that is also biased at the quadrature point but at the opposite slope of the transfer function. The signals from the two channels are sent to a photodetector (PD). If the optical powers into the two channels are identical, the third-order intermodulation terms are completely suppressed. An experiment is performed. An enhancement in SFDR of 10 dB is achieved. The insertion loss of the proposed MPL is also estimated, which is 9.5 dB smaller than a phase modulator based MPL.Index Terms-Microwave photonic link, polarization modulator, phase-shifted fiber Bragg grating, spurious-free dynamic range, suppressed-carrier.

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Recent Progress in Electro‐Optic Modulators: Physical Phenomenon, Structures Properties, and Integration Strategy

Yan,

Zhang,

Liu

et al. 2024

Laser & Photonics Reviews

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Electro‐optic modulators (EOMs), serving as indispensable components within photonic integrated circuits, are essential for enabling energy‐efficient, high‐speed, and high‐capacity optical communication systems. This review illustrates the principal physical phenomenon exploited in EOMs and provides a comprehensive analysis of the cutting‐edge EOMs featuring interference structures (Mach–Zehnder modulators and Michelson‐interferometer modulators) and resonance structures (microring modulators, racetrack modulators, and photonic crystal modulators). The comparative analysis of the performance merits and limitations in EOMs is presented, highlighting the combination of diverse electro‐optic material compositions with different optical structures, which reveals a promising integration strategic so as to pursue a trade‐off in modulation performance. It is contributed to the ongoing discourse on optimizing EOMs for the subsequent communication technologies and the advancement of photonic chips.

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Improving the dynamic range of a coherent AM analog optical link using a cascaded linearized modulator

Cited by 33 publications

References 9 publications

Large Signal Analysis of the Mach-Zehnder Interferometer with One Arm Loaded with a Second-Order Allpass Double-Microring Resonator

Large Signal Analysis of the Mach-Zehnder Interferometer with One Arm Loaded with a Second-Order Allpass Double-Microring Resonator

Microwave Photonic Link With Improved Dynamic Range Using a Polarization Modulator

Recent Progress in Electro‐Optic Modulators: Physical Phenomenon, Structures Properties, and Integration Strategy

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