Automatic Monitor-Based Tuning of an RF Silicon Photonic 1X4 Asymmetric Binary Tree True-Time-Delay Beamforming Network

Choo, Gihoon; Madsen, C.K.; Palermo, Samuel; Entesari, Kamran

doi:10.1109/jlt.2018.2873199

Cited by 35 publications

(12 citation statements)

References 38 publications

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“…Proposals have been reported to program PICs targeting specific applications. Examples of this include the configuration of multiport interferometers based on the individual control of tunable couplers and switches 12,39,40 , automated path scheduling and assessment of a complex wavelength-and-space-switch circuit 41 , automated bank filters [42][43][44][45][46] , reconfigurable all-pass filters 47 and beamforming networks 48 . Large-scale and very large-scale PICs will find it difficult to rely on local feedback loops for controlling each tunable unit due to the excessive overhead caused by monitors and electronic access tracks.…”

Section: Discussionmentioning

confidence: 99%

Multipurpose self-configuration of programmable photonic circuits

et al. 2020

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Programmable integrated photonic circuits have been called upon to lead a new revolution in information systems by teaming up with high speed digital electronics and in this way, adding unique complementary features supported by their ability to provide bandwidth-unconstrained analog signal processing. Relying on a common hardware implemented by two-dimensional integrated photonic waveguide meshes, they can provide multiple functionalities by suitable programming of their control signals. Scalability, which is essential for increasing functional complexity and integration density, is currently limited by the need to precisely control and configure several hundreds of variables and simultaneously manage multiple configuration actions. Here we propose and experimentally demonstrate two different approaches towards management automation in programmable integrated photonic circuits. These enable the simultaneous handling of circuit self-characterization, auto-routing, self-configuration and optimization. By combining computational optimization and photonics, this work takes an important step towards the realization of high-density and complex integrated programmable photonics.

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Section: Discussionmentioning

confidence: 99%

Multipurpose self-configuration of programmable photonic circuits

et al. 2020

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“…OTTD eliminates the bandwidth constraint by providing frequency independent time delay between the antenna elements [4]. Thus far, several integrated OTTD schemes have been implemented based on photonic crystals waveguides [27], [28], waveguide Bragg grating [29], [30], Blass matrix based optical switches [31], switchable waveguide delay matrices [32], [33], optical ring resonators (ORR) [34], [35], and arrayed waveguide grating (AWG) [36], [37]. Out of these, switchable waveguide delay and ORR are suited for monolithic implementation on silicon on an insulator (SOI) platform; therefore they have been aggressively researched in the last decade.…”

Section: Integrated Optical Beamforming Overviewmentioning

confidence: 99%

“…The grating coupler based coupling loss at the interface of the chip for channeling light into the chip is considered to be 3.1 dB [39]. The insertion loss associated with ORR utilizing 1 × 4 beamformer network (illustrated using simplified diagram in Fig 3(a)) is reported to be 9.2 dB [34]. The ORR based beamforming network can be generalized to larger structures, for example 1 × 8, 1 × 16, etcetera, where the total number of rings depends on 1) the required delay tuning range per delay element 2) the required delay ripple (corresponding phase response accuracy) and the optical bandwidth.…”

Section: Power Budget For the Proposed Imwp Transmittermentioning

confidence: 99%

An Analysis of RF On-Chip Antennas in Si-Based Integrated Microwave Photonics

2021

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We investigate the monolithic integration of RF antennas onto a silicon-based integrated microwave photonics (IMWP) chip for short-range millimeter-wave (mmW) communication. The unification of antenna with photonic integrated circuits (PICs) reduces system loss for high data rate communication by eliminating parasitic interconnects. This integration of electronics (antenna) with photonics will be a key milestone leading to increased bandwidth capability and ubiquitous wireless links for emerging applications such as 5G, Internet of Things (IoT), autonomous vehicles, high data rate point-to-point communication, and wireless sensors. Through simulation above 20 GHz, we compare the transmission of three on-chip antenna structures designed in a commercial silicon photonics (SiPh) process and consider them for both inter and intra-chip communication. Results provide insight on the transmission gain variations relative to the antenna orientation from their distinct radiation pattern. The folded monopole structure provides superior gain, smaller footprint with layout flexibility, and good transmission spectra. The analysis supports the idea of a monolithic mmW transmitter integrated with on-chip antennas on IMWP chip.

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“…For non-integrated schemes, there are optical frequency comb combined with dispersion waveguides [8]- [10], two-dimensional array of liquid crystal [11], fiber Bragg gratings [12], etc. For the integrated OTTD, such as photonic crystal waveguides [13], waveguide Bragg gratings [14], [15], Blass matrix based on optical switches [16], microring resonators (MRR) [17]- [26] and switchable waveguide delay lines [27]- [30] have been demonstrated. Among those schemes, tunable OTTD based MRR and optical switchable waveguides are simple and suitable to be monolithic integrated on silicon on insulator (SOI) chips, therefore, they have attracted increasing interests of the researchers.…”

Section: Introductionmentioning

confidence: 99%

“…To solve these problems, Choo et al proposed an automatic monitor-based optical beamforming network (OBFN) based on silicon MRRs which operates at 30 GHz with 2 GHz bandwidth [26].…”

Section: Introductionmentioning

confidence: 99%

A Seven Bit Silicon Optical True Time Delay Line for Ka-Band Phased Array Antenna

Zheng

Wang

et al. 2019

IEEE Photonics J.

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A seven-bit optical true time delay unit with a delay tuning increment of 1.42 ps was designed and fabricated on silicon photonics platform, which can be utilized in Ka-band phased array antenna systems. The delay unit consists of eight thermo-optical switches and seven waveguide delay lines with different lengths. By manipulating the states of the thermo-optical switches, 128 stages of discrete time delays varying from 0 to 191.37 ps has been obtained with low average power consumption of 178.77 mW. Besides, the integrated delay unit was fabricated on the silicon-on-insulator chip that has a very compact footprint of 7.4 mm × 1.8 mm. In addition, as the waveguide delay dependence on the modulation frequency is very limited and can be neglected, the proposed delay unit should process a large bandwidth that allows it to be utilized in microwave applications with abundant bandwidth.

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Automatic Monitor-Based Tuning of an RF Silicon Photonic 1X4 Asymmetric Binary Tree True-Time-Delay Beamforming Network

Cited by 35 publications

References 38 publications

Multipurpose self-configuration of programmable photonic circuits

Multipurpose self-configuration of programmable photonic circuits

An Analysis of RF On-Chip Antennas in Si-Based Integrated Microwave Photonics

A Seven Bit Silicon Optical True Time Delay Line for Ka-Band Phased Array Antenna

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