Abstract
We report an 8 × 8 silicon photonic integrated Arrayed Waveguide Grating Router (AWGR) targeted for WDM routing applications in O-band. The AWGR was designed for cyclic-frequency operation with a channel spacing of 10 nm. The fabricated AWGR exhibits a compact footprint of 700 × 270 μm2. Static device characterization revealed 3.545 dB maximum channel loss non-uniformity with 2.5 dB best-case channel insertion losses and 11 dB channel crosstalk, in good agreement with the simulated results. Successful data routing operation is demonstrated with 25 Gb/s signals for all 8 × 8 AWGR port combinations with a maximum power penalty of 2.45 dB.
Highlights
Ware-house datacenters and high-performance computers (HPC) are constantly scaling up, imposing new requirements for high-capacity networks to exhibit low-latency, highthroughput and low-power links
Wavelength routing based on Arrayed Waveguide Gratings Routers (AWGRs) has emerged as a promising interconnection solution for datacom environments [5], since Arrayed Waveguide Grating Router (AWGR) can offer a low latency, non-blocking interconnection even for an all-to-all communication scheme, when employed as N × N routers [6]
AWGRs are completely passive devices allowing for routing to be performed directly in the optical domain without consuming additional energy
Summary
Ware-house datacenters and high-performance computers (HPC) are constantly scaling up, imposing new requirements for high-capacity networks to exhibit low-latency, highthroughput and low-power links. Recent attempts are focusing on taking advantage of the progress in photonic integration towards producing alternative on-chip switching and routing schemes that can reap the inherent speed and energy benefits of optics [1,2,3,4] In this context, wavelength routing based on Arrayed Waveguide Gratings Routers (AWGRs) has emerged as a promising interconnection solution for datacom environments [5], since AWGRs can offer a low latency, non-blocking interconnection even for an all-to-all communication scheme, when employed as N × N routers [6]. In this way, a N × N AWGR supports N2 interconnections when employed as N × N router in an interconnect architecture, requiring the use of N wavelengths
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