Power-Efficient Calibration and Reconfiguration for Optical Network-on-Chip

Zheng, Yan; Lisherness, Peter; Gao, Ming; Bovington, Jock; Cheng, Kwang-Ting; Wang, Hong; Yang, Shiyuan

doi:10.1364/jocn.4.000955

Cited by 27 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [13], system level analyses allow evaluating the influence of temperature variation on the optical signal power received by the photodetectors. In order to counter-balance the temperature variation, communication channels can be remapped through ONoC reconfiguration [15] and DVFS and workload migration techniques can be applied [16]. These techniques depend on redundant resources to re-map the wavelength channel or detect run-time temperature variation.…”

Section: Related Workmentioning

confidence: 99%

Thermal Aware Design Method for VCSEL-Based On-Chip Optical Interconnect

Li¹,

Fourmigue²,

Beux³

et al. 2015

Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE), 2015

View full text Add to dashboard Cite

Abstract-Optical Network-on-Chip (ONoC) is an emerging technology considered as one of the key solutions for future generation on-chip interconnects. However, silicon photonic devices in ONoC are highly sensitive to temperature variation, which leads to a lower efficiency of Vertical-Cavity SurfaceEmitting Lasers (VCSELs), a resonant wavelength shift of Microring Resonators (MR), and results in a lower Signal to Noise Ratio (SNR). In this paper, we propose a methodology enabling thermal-aware design for optical interconnects relying on CMOS-compatible VCSEL. Thermal simulations allow designing ONoC interfaces with low gradient temperature and analytical models allow evaluating the SNR.

show abstract

Section: Related Workmentioning

confidence: 99%

Thermal Aware Design Method for VCSEL-Based On-Chip Optical Interconnect

Li¹,

Fourmigue²,

Beux³

et al. 2015

Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE), 2015

View full text Add to dashboard Cite

show abstract

“…Both thermal and process variation effects will cause the mismatch between the resonance wavelength and the carrier wavelength. Many tuning schemes and circuits have been proposed to address the wavelength mismatch problem [8], [9], [11], [12], [25]. However, few tuning schemes take into account the variations of the Q and the ER.…”

Section: Variation Challengesmentioning

confidence: 99%

“…Since the electrical tuning is power-efficient and the electrical tuning range (1 nm in Fig. 4) can cover the channel spacing (0.9 nm), we therefore adopt the electrical tuning with the channel remapping (or reshuffling) technique to compensate for the wavelength mismatch [8], [9]. Other than specified for parameter sweeps, the number of clusters is set to 16; the maximum temptation variation is set to 17 • C [13]; the laser type is on-chip DFB laser.…”

Section: A Experimental Setupmentioning

confidence: 99%

“…As a result of the process and thermal variation effects, the resonance wavelength of the ring resonator deviates from the desirable carrier wavelength, which leads to performance degradation or even failure. This wavelength mismatch problem has been extensively studied: many power-efficient tuning and channel arrangement schemes have been proposed [8]- [10]; several feedback-based wavelength stabilization circuits have also been implemented [11], [12]. Existing work on thermal and process variations mainly focuses on the tuning of the resonance wavelength [13]- [17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Variation-aware adaptive tuning for nanophotonic interconnects

Wu¹,

Chen²,

Li³

et al. 2015

2015 IEEE/ACM International Conference on Computer-Aided Design (ICCAD)

Self Cite

View full text Add to dashboard Cite

Short-reach nanophotonic interconnects are promising to solve the communication bottleneck in data centers and chip-level scenarios. However, the nanophotonic interconnects are sensitive to process and thermal variations, especially for the microring structures, resulting in significant variation of an optical link's bit error rate (BER). In this paper, we propose a power-efficient adaptive tuning approach for nanophotonic interconnects to address the variation issues. During the adaptive tuning process, each nanophotonic interconnect is adaptively allocated just enough power to meet the BER requirement. The proposed adaptive tuning approach could reduce the photonic receiver power by 8% -34% than the worst-case based fixed design while achieving the same BER. Our evaluation results show that the adaptive tuning approach scales well with the process variation, the thermal variation and the number of communication nodes, and can accommodate different types of NoC architectures and lasers.

show abstract

“…Although advanced schemes have been developed to reduce phase tuning requirements, e.g. in multi-channel WDM transceivers [9], in a typical system configuration wavelength tuning by a full free spectral range (FSR) is required at start-up, followed by additional tuning during operation to compensate for environmental temperature swings. While thermally isolating resonant devices has resulted in very substantial improvements of the power efficiency of thermal tuners [10], this only partially alleviates the problem, as on the one hand process complexity is increased and on the other hand limitations to the maximum allowable device temperature as constrained by device reliability remain.…”

Section: Introductionmentioning

confidence: 99%

Broadband, temperature tolerant and passively biased resonantly enhanced Mach-Zehnder modulators

Romero-García

Moscoso-Mártir

Nojić

et al. 2018

2018 IEEE 13th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

View full text Add to dashboard Cite

We describe a resonantly enhanced Mach-Zehnder modulator (MZM) that can be operated over a wide temperature range of 55 o C without being actively biased, while providing a significant resonant enhancement of 6.8 at the nominal wavelength / temperature compared to a linear MZM driven with a distributed driver. More importantly, it enables a ~20X improvement in power consumption compared to a 50 W matched linear travelling wave modulator with comparable phase shifter technology, drive voltage and output optical modulation amplitude. Passive biasing of the Mach-Zehnder interferometer is further implemented by replacing a splitter element in the MZM with a novel device combining splitting and fiber coupling functionalities in a single, multi-modal structure, that converts permanent fiber placement into a phase correction. Both concepts are combined in a single modulator device, removing the need for any type of active control in a wide temperature operation range.

show abstract

Power-Efficient Calibration and Reconfiguration for Optical Network-on-Chip

Cited by 27 publications

References 24 publications

Thermal Aware Design Method for VCSEL-Based On-Chip Optical Interconnect

Thermal Aware Design Method for VCSEL-Based On-Chip Optical Interconnect

Variation-aware adaptive tuning for nanophotonic interconnects

Broadband, temperature tolerant and passively biased resonantly enhanced Mach-Zehnder modulators

Contact Info

Product

Resources

About