Silicon-based all-optical multi microring network-on-chip

Abstract

An optical multi microring network-on-chip (MMR NoC) is proposed and evaluated through numerical simulations. The network architecture consists of a central resonating microring with local microrings connected to the input/output ports. A mathematical model based on the transfer matrix method is used to assess the MMR NoC performance and to analyze the fabrication tolerances. Results show that the proposed architecture exhibits a limited coherent crosstalk with a bandwidth suitable for 10 Gb/s signals, and it is robust to coupling ratio variations and ring radii fabrication inaccuracies.

BER evaluation of a low-crosstalk silicon integrated multi-microring network-on-chip

“…An optical NoC architecture that avoids waveguide crossing and ensures path uniformity in terms of crossed switched elements is the recently proposed multi-microring (MMR) network-on-chip [13]. This architecture is based on a ring topology, which is realized with a central microring accessed by coupling the signal with local microrings, or simply local rings.…”

Fast scheduling based on iterative parallel wavelength matching for a multi-wavelength ring network-on-chip

“…Add and drop operations are achieved by properly tuning the local microring resonator to the wavelength to be added (dropped). Multiwavelength communication is possible on the ring with low crosstalk by properly aligning the resonant frequencies of the central microring and of the local microring resonators, enabling beneficial filtering effects [7], [8].…”

“…As shown in the figure, the main advantage of the proposed MMR architecture is the lack of waveguide crossing. This advantage along with the demonstrated low crosstalk [7], [8] permits MMR architecture to support multiple concurrent transmissions on different wavelengths from any input port to any output port. To achieve a low-latency, high throughput and a fair access to the shared resources (i.e., wavelengths on the ring), communications between ports must be properly scheduled.…”

“…This paper focuses on a recently presented optical NoC with ring topology [7], [8]. The NoC has been realized with microring resonators as add/drop elements and to guide the optical signals, thus is named multi-microring resonators (MMR).…”

Ring versus bus: A BER comparison of photonic integrated networks-on-chip

“…PIC design parameters are as in [4,5] (i.e., single-mode waveguides, microring radius of 10 ȝm, ratio of 4 between the optical path length of the shared ring and of the microring, coupling coefficient of 10% between microring and shared waveguide). For both architectures, single-polarization grating couplers interface the fibers to the PIC.…”