Optically Controlled RF Phase Shifts in SOAs by Adding the XGM Response of an Optical Signal

Hamdash, Noor; Sharaiha, Ammar; Rampone, Thierry; Quendo, Cédric; Martin, Noham; Berre, Denis Le

doi:10.1109/lpt.2019.2918074

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…Thereby, Eq. (25) and (26) show that a pump-probe setup can provide access to the frequency response of the carrier density, which will be used to analyze the Up-CPO frequency response defined in (8) and (9). By substituting (18) and ( 20) into (25) and ( 26) we obtain the expression of ,±…”

Section: Probe Output Powermentioning

confidence: 99%

“…True time delays are needed to obtain wide instantaneous bandwidth and beam squint-free operation of the PAA [3]. Tunable microwave photonic phase shifter can be implemented by properly profiting from self-gain modulation (SGM) and cross-gain modulation (XGM) in semiconductor waveguides [8][9].…”

Section: Introductionmentioning

confidence: 99%

“…SOAs have been used as a freestanding device for MWP phase shifters and several works have covered tunable phase shifting based on CPO effects in SOA [5][6][7][8][9][10][11][12][13][14][15]. However, CPO techniques limit the operating frequency applications to few hundreds of GHz due to the SOA carrier lifetime [7] [11], when used for the generation of a time delay.…”

Section: Introductionmentioning

confidence: 99%

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Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

et al. 2021

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This paper presents theoretical and experimental analysis of up-converted coherent population oscillations (Up-CPO) in semiconductor optical amplifiers (SOAs) for tunable optical phase shift applications at high frequencies. The study of Up-CPO frequency response is carried out by a small-signal analysis of a SOA modeled by two calculation sections in order to better take into account the nonlinear effects such as the SOA gain saturation. We demonstrate that we can fully determine the dynamic parameters of Up-CPO from the experimental frequency response of an optical probe signal obtained by cross-gain modulation mechanism. The Up-CPO frequency responses are measured for three SOAs with different cut-off frequencies up to 18.45 GHz. We finally validate experimentally the obtained analytical frequency responses for the three SOAs over different operating points, each characterized by the corresponding optical gain.

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Section: Probe Output Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

et al. 2021

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“…Microwave photonics have been in the research spotlight thanks to their ability to offer equal or even superior performance compared to the electrical beamforming networks and support ultra-wideband operation, with lower power consumption and immunity to electromagnetic interference [3]- [4]. Initial efforts involve mainly implementations of true time delay (TTD) optical beamforming networks (OBFNs) based on fiber segments of various length [5]- [6], multi-core [7]- [8] and highly dispersive fibers [9]- [10], fiber Bragg gratings [11]- [12], spatial light modulators [13]- [14], micro-optics [15]- [17], and semiconductor optical amplifiers [18]- [19]. In addition, implementations that approximate the TTD operation using optical phase shifters have also been proposed [20]- [21].…”

Section: Introductionmentioning

confidence: 99%

True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration

Tsokos¹,

Andrianopoulos²,

Raptakis³

et al. 2021

Preprint

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<div>We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC) comprises a hybrid InP-Si3N4 external cavity laser, a pair of InP phase modulators, a Si3N4 optical single-sideband full carrier (SSBFC) filter followed by four tunable optical true time delay lines (OTTDLs), and four InP photodetectors. The performance of the OBFN-PIC is experimentally characterized by measuring the link gain, noise figure, and spurious free dynamic range of the microwave photonics links. Moreover, we assess its beamforming capabilities assuming that the OBFN-PIC is part of a wireless system operating in the downlink direction and feeds a multielement antenna array. Using microwave signals at 5 and 10 GHz with quadrature amplitude modulation (QAM) formats at 500 Mbaud, we evaluate the performance of the OBFN-PIC under various configurations. An error-free performance is achieved for all the experimental cases validating the potential of the proposed OBFN-PIC for high-quality beamforming performance. To our best of knowledge, this is the first thorough performance evaluation of a fully integrated OBFN-PIC.</div>

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“…performance compared to the electrical beamforming networks and support ultra-wideband operation, with lower power consumption and immunity to electromagnetic interference [3]- [4]. Initial efforts involve mainly implementations of true time delay (TTD) optical beamforming networks (OBFNs) based on fiber segments of various length [5]- [6], multi-core [7]- [8] and highly dispersive fibers [9]- [10], fiber Bragg gratings [11]- [12], spatial light modulators [13]- [14], micro-optics [15]- [17], and semiconductor optical amplifiers [18]- [19]. In addition, implementations that approximate the TTD operation using optical phase shifters have also been proposed [20]- [21].…”

Section: Introductionmentioning

confidence: 99%

True Time Delay Optical Beamforming Network Based on Hybrid Inp-Silicon Nitride Integration

Tsokos

Andrianopoulos

Raptakis

et al. 2021

J. Lightwave Technol.

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We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC) comprises a hybrid InP-Si3N4 external cavity laser, a pair of InP phase modulators, a Si3N4 optical single-sideband full carrier (SSBFC) filter followed by four tunable optical true time delay lines (OTTDLs), and four InP photodetectors. Each OTTDL consists of eight cascaded thermo-optical micro-ring resonators (MRRs) that impose tunable true time delay on the propagating optical signals. The OBFN-PIC is designed to facilitate the steering of a microwave signal with carrier frequency up to 40 GHz over a continuous set of beam angles. We evaluate the performance of the OBFN-PIC to handle and process microwave signals, measuring the link gain, the noise figure (NF), and the spurious-free dynamic range (SFDR) parameters. Moreover, we assess its beamforming capabilities assuming that the OBFN-PIC is part of a wireless system operating in the downlink direction and feeds a multielement antenna array. Using microwave signals at 5 and 10 GHz with quadrature amplitude modulation (QAM) formats at 500 Mbaud, we evaluate the performance of the OBFN-PIC under various configurations. We show that error-free performance can be achieved at both operating frequencies and for all the investigated beam angles ranging from 45° to 135°, thus validating its potential for high-quality beamforming performance. Index Terms-Microwave photonics, optical beamforming network, optical true-time delay lines, photonic integrated circuits.

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Optically Controlled RF Phase Shifts in SOAs by Adding the XGM Response of an Optical Signal

Cited by 6 publications

References 16 publications

Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration

True Time Delay Optical Beamforming Network Based on Hybrid Inp-Silicon Nitride Integration

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