System-Level Modeling and Analysis of Thermal Effects in WDM-Based Optical Networks-on-Chip

Ye, Yaoyao; Wang, ‪Zhehui; Yang, Peng; Xu, Jiang; Wu, Xiaowen; Wang, Xuan; Nikdast, Mahdi; Duong, Luan H. K.

doi:10.1109/tcad.2014.2351584

Cited by 38 publications

(9 citation statements)

References 35 publications

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“…So does the device-level wavelength tuning technique, which will compensate for the wavelength shifts of MRs due to PVs and TVs simultaneously. For reliable data transmission, local wavelength tuning is generally applied for every MR in ONoCs [9]. Through heating or current injection, it potentially achieves wavelength-locking and stabilization [10].…”

Section: Introductionmentioning

confidence: 99%

Thermal Sensing Using Micro-ring Resonators in Optical Network-on-Chip

Liu

Chang

et al. 2019

2019 Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE)

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In this paper, we for the first time utilize the microring resonators (MRs) in optical networks-on-chip (ONoCs) to implement thermal sensing without requiring additional hardware or chip area. The challenges in accuracy and reliability that arise from fabrication-induced process variations (PVs) and device-level wavelength tuning mechanism are resolved. We quantitatively model the intrinsic thermal sensitivity of MRs with finegrained consideration of wavelength tuning mechanism. Based on it, a novel PV-tolerant thermal sensor design is proposed. By exploiting the hidden 'redundancy' in wavelength division multiplexing (WDM) technique, our sensor achieves accurate and efficient temperature measurement with the capability of PV tolerance. Evaluation results based on professional photonic component and circuit simulations show an average of 86.49% improvement in measurement accuracy compared to the state-ofthe-art on-chip thermal sensing approach using MRs. Our thermal sensor achieves stable performance in the ONoCs employing dense WDM with an inaccuracy of only 0.8650 K.

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Section: Introductionmentioning

confidence: 99%

Thermal Sensing Using Micro-ring Resonators in Optical Network-on-Chip

Liu

Chang

et al. 2019

2019 Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE)

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“…This paper proposes a thermal-aware tuning method to overcome the wavelength variation induced by temperature variation, while achieving the targeted BER. The novelty of the method relies on the tuning of the laser driver current, which ideally complements traditional methods such as MRs tuning and channel remapping [14] [15]. While the method is evaluated for on-chip laser sources, it is also suitable for off-chip lasers since the impact of a temperature elevation would remain the same.…”

Section: Imentioning

confidence: 99%

“…Channel hopping, along with additional MRs on the ends of the spectral range, is utilized for tuning in [20] [22]. In [14], the thermal tuning is adopted to adjust the MR resonant wavelength to the neighboring channel wavelength. In order to counter-balance the temperature variation, communication channels can be remapped through ONoC reconfiguration [23].…”

Section: Related Work IImentioning

confidence: 99%

Towards Maximum Energy Efficiency in Nanophotonic Interconnects with Thermal-Aware On-Chip Laser Tuning

Fourmigue

Beux

et al. 2018

IEEE Trans. Emerg. Topics Comput.

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Nanophotonic is an emerging technology considered as one of the key solutions for future generation on-chip interconnects. However, silicon photonic devices are highly sensitive to temperature variation. Under a given chip activity, this leads to a lower laser efficiency and a drift of wavelengths of optical devices (on-chip lasers and microring resonators (MRs)), which results in a higher Bit Error Ratio (BER). In this paper, we propose to jointly tune the on-chip lasers and and MRs in order to align the wavelengths of the emitted signals with the resonant wavelengths of the MRs. Our method allows significant improvements of the power consumption with regard to the related methods, while meeting the BER requirement. Compared to methods for which laser tuning is not possible, results show that a combined tuning of laser and MRs leads to 53% energy reduction when the uniform chip activity decreases from 20% to 5%. BER-energy tradeoffs have been explored and allow strategies to be defined to minimize either the energy, or the BER. As a key result, we have shown that, under specific chip activities, increasing the laser power consumption allows both energy and BER to be improved. This trend has been observed for a MWSR channel interconnecting 12 interfaces.

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“…Ye et al [10] presented a system-level analytical thermal model for general ONoCs and analyzed the thermal power of the optical devices. Nitta et al [11] analyzed the trimming power of the microrings when the temperature changes firstly and then proposed the SRW and PMMA-clad resonators to decrease the trimming power.…”

Section: Related Workmentioning

confidence: 99%

Optimize the Power Consumption and SNR of the 3D Photonic High-Radix Switch Architecture Based on Extra Channels and Redundant Rings

Jian

Lai

Xiao

2018

Journal of Computer Networks and Communications

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e demand from exascale computing has made the design of high-radix switch chips an attractive and challenging research field in EHPC (exascale high-performance computing). e static power, due to the thermal sensitivity and process variation of the microresonator rings, and the cross talk noise of the optical network become the main bottlenecks of the network's scalability. is paper proposes the analyze model of the trimming power, process variation power, and signal-to-noise ratio (SNR) for the Graphein-based high-radix optical switch networks and uses the extra channels and the redundant rings to decrease the trimming power and the process variation power. e paper also explores the SNR under different configurations. e simulation result shows that when using 8 extra channels in the 64 × 64 crossbar optical network, the trimming power reduces almost 80% and the process variation power decreases 65% by adding 16 redundant rings in the 64 × 64 crossbar optical network. All of these schemes have little influence on the SNR. Meanwhile, the greater channel spacing has great advantages to decrease the static power and increase the SNR of the optical network.

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System-Level Modeling and Analysis of Thermal Effects in WDM-Based Optical Networks-on-Chip

Cited by 38 publications

References 35 publications

Thermal Sensing Using Micro-ring Resonators in Optical Network-on-Chip

Thermal Sensing Using Micro-ring Resonators in Optical Network-on-Chip

Towards Maximum Energy Efficiency in Nanophotonic Interconnects with Thermal-Aware On-Chip Laser Tuning

Optimize the Power Consumption and SNR of the 3D Photonic High-Radix Switch Architecture Based on Extra Channels and Redundant Rings

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