External Modulator-Based Automatic Tuning of Reconfigurable Silicon Photonic 4th-Order APF-based Pole/Zero Filters

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

doi:10.1364/ofc.2021.th4b.6

“…The notch filter is designed by cascading MZI-based ring resonators each providing adequate rejection and independent center frequency control [12,23]. The value of the FSR is chosen to balance in-band loss and sweeping time to cover the frequency band, and quality factor.…”

Section: Jammer-reject Notch Filtermentioning

confidence: 99%

Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

Rady,

Madsen,

Palermo

et al. 2024

Preprint

0

View full text Add to dashboard Cite

This article presents a novel chip-scale 25-45-GHz re-configurable mm-wave remote antenna unit (RAU) for radio over fiber (RoF) distributed antenna systems. The proposed RAU architecture optimizes energy efficiency by operating directly at mm-wave frequencies, and spectral efficiency by selecting re-configurable RF photonic filters topology. Additionally, it achieves frequency agility by rejecting interferes and a small form factor by utilizing SOI photonics process. Two photonic integrated circuits (PICs) that act as downlink and uplink units are presented while occupying a total area of 12.33 mm$^2$. The downlink selects a single channel within the desired frequency range, while the uplink rejects up to four interferes. The building blocks of the proposed architecture are discussed and their design consideration and parameters are shown. Then, a comprehensive system analysis of the proposed RAU architecture including key performance indicators is presented. A scalable 5-channel system is demonstrated each with a 3-dB Bandwidth of 5-GHz. Moreover, this architecture can be continuously tuned and re-configured within a wide frequency range to cover all 5-channels. To the best of the authors’ knowledge, this is the first wideband modular and re-configurable mm-wave RAU that covers the entire mm-wave sub-45-GHz band implemented in silicon photonics.

show abstract

“…However, the maximum FSR is limited by the minimum length (specifically the heater length of 320-um), thus 50-GHz FSR is chosen. The monitor response of the unit MZI-Ring is used for tuning and calibration [12,23]. [12,23].…”

Section: Channel-select (Image-reject) Filtermentioning

confidence: 99%

“…The monitor response of the unit MZI-Ring is used for tuning and calibration [12,23]. [12,23]. Furthermore, a high filter order is suitable for higher rejection but at the cost of higher in-band insertion loss, thus only a 4th-order filter is chosen.…”

Section: Channel-select (Image-reject) Filtermentioning

confidence: 99%

“…This is challenging to achieve by electronic solutions and eliminating the need for power-hungry LOs. However, to achieve the aforementioned functionalities, accurate and fully automatic process calibration needs to be implemented for the PIC to address initial response distortion due to process variations of SiP technology [12]. Also, the SOI PIC alone is lossy due to the absence of photonic amplifiers, and hence CMOS pre/post-amplifier stages are required to improve overall system performance.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

Rady,

Madsen,

Palermo

et al. 2024

Preprint

0

View full text Add to dashboard Cite

This article presents a novel chip-scale 25-45-GHz re-configurable mm-wave remote antenna unit (RAU) for radio over fiber (RoF) distributed antenna systems. The proposed RAU architecture optimizes energy efficiency by operating directly at mm-wave frequencies, and spectral efficiency by selecting re-configurable RF photonic filters topology. Additionally, it achieves frequency agility by rejecting interferes and a small form factor by utilizing SOI photonics process. Two photonic integrated circuits (PICs) that act as downlink and uplink units are presented while occupying a total area of 12.33 mm$^2$. The downlink selects a single channel within the desired frequency range, while the uplink rejects up to four interferes. The building blocks of the proposed architecture are discussed and their design consideration and parameters are shown. Then, a comprehensive system analysis of the proposed RAU architecture including key performance indicators is presented. A scalable 5-channel system is demonstrated each with a 3-dB Bandwidth of 5-GHz. Moreover, this architecture can be continuously tuned and re-configured within a wide frequency range to cover all 5-channels. To the best of the authors’ knowledge, this is the first wideband modular and re-configurable mm-wave RAU that covers the entire mm-wave sub-45-GHz band implemented in silicon photonics.

show abstract

A 20–43.5-GHz Wideband Tunable Silicon Photonic Receiver Front-End for mm-wave Channel Selection/Jammer Rejection

Rady

¹

,

Madsen

²

,

Palermo

³

et al. 2023

J. Lightwave Technol.

View full text Add to dashboard Cite

External Modulator-Based Automatic Tuning of Reconfigurable Silicon Photonic 4th-Order APF-based Pole/Zero Filters

Abstract: This paper presents an automatic monitor-based tuning of an APF-based pole/zero optical filter using an external modulator. The proposed algorithm uses a modulator to tune the filter center frequency instead of a tunable laser.

Cited by 7 publications

References 3 publications

Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

A 20–43.5-GHz Wideband Tunable Silicon Photonic Receiver Front-End for mm-wave Channel Selection/Jammer Rejection

Contact Info

Product

Resources

About