Demonstration of a monolithic multichannel module for multi-Gb/s intra-MCM optical interconnects

Verschaffelt, Guy; Buczyński, Ryszard; Tuteleers, Patrik; Vynck, Pedro; Baukens, Valerie; Ottevaere, Heidi; Kufner, Stefan; Kufner, M.; Hermanne, Alex; Genoe, Jan; Coppée, Daniël; Vounckx, Roger; Borghs, Staf; Veretennicoff, Irina; Thienpont, Hugo

doi:10.1109/68.726772

Cited by 15 publications

(7 citation statements)

References 6 publications

(5 reference statements)

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“…A second part integrates the counterpart mounting features and two micromirrors at a right angle to fold the 8 mm long light path over 180° (Figures 11a and 11b). We have already reported on the design, tolerance analysis [29,30], the rapid prototyping with deep proton lithography in Poly MethylMetAcrylate (PMMA) [21] of such an optical bridge for intra-chip interconnects [28,31], the opportunities for mass-replication through injection molding, and we have demonstrated its operation at 622Mbits/s [28] and at 2.48-Gb/s per channel [32]. This scalable 'optical bridge' concept allows for an increase in channel densities by using smaller lens diameters.…”

Section: Design Of a Free-space Micro-optical Bridge For In-plane Intmentioning

confidence: 99%

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

et al. 2000

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In this paper we present different configurations for a compact free-space optical interconnection (FSOI) module by combining two radial gradient refractive index lenses (GRIN) and/or two arrays of refractive microlenses. Based on our findings with ray-tracing and radiometric analysis we discuss how we have selected the proper optical system configurations and how we have chosen the different design parameters to optimally accommodate different types of opto-electronic emitters such as LEDs, micro-cavity LEDs and VCSELs. We hereby focused on maximizing optical coupling efficiencies and misalignment tolerances while minimizing inter-channel cross-talk. Furthermore we discuss the experimental optical characteristics of two such prototype modules that we completed together with the first experimental results of their use in parallel data communication demonstrator systems.

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Section: Design Of a Free-space Micro-optical Bridge For In-plane Intmentioning

confidence: 99%

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

et al. 2000

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“…The guided-wave approach uses fibers or fiber bundles to confine the photons and guide them over several tens of centimeters 13,14,15 . Free-space optical interconnects use macro-optics 16,17,18,19 , micro-optics 20,21,22 or planar optics 23 to shape and direct the light beams from transmitter to detector. Most of the implementations follow a guidedwave approach but we chose for micro-optics to implement a free-space link between an array of transmitters and an array of receivers.…”

Section: The Micro-optical Pathway Blockmentioning

confidence: 99%

Multichannel free-space intrachip optical interconnections: combining plastic micro-optical modules and VCSEL-based OE-FPGA

et al. 2002

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We fabricated and replicated in semiconductor compatible plastics a multi-channel free-space optical interconnection module designed to establish intra-chip interconnections on an Opto-Electronic Field Programmable Gate Array (OE-FPGA). The micro-optical component is an assembly of a refractive lenslet-array and a high-quality microprism. Both components were prototyped using deep lithography with protons and were monolithically integrated using a vacuum casting replication technique. The resulting 16 channel module shows optical transfer efficiencies of 50% and interchannel cross-talks as low as -22 dB. These characteristics are sufficient to establish multi-channel intra-chip interconnects with OE-FPGA's.The OE-FPGA we used was designed within a European co-founded MEL-ARI consortium, working towards a manufacturable solution for optical interconnects between CMOS IC's. The optoelectronic chip combines fully functional FPGA digital logic with the drivers, receivers and flip-chipped optoelectronic components. It features 2 optical inputs an 2 optical outputs per FPGA cell, amounting to 256 photonic I/O links based on multi-mode 980 nm VCSELs and InGaAs detectors.With a careful alignment of the micro-optical free-space module above the OE-VLSI chip, we demonstrated for the first time to our knowledge a multi-channel free-space intra-chip optical interconnection. Data-communication was achieved with 4 simultaneous channels working at 10Mb/s. The bitrate was limited by the chiptester. Notwithstanding the use of non-aggressive 0.6 µm CMOS technology the FPGA will provide an 80 Mbit/s information rate per channel using manchester encoded links. The whole chip therefore has in principle a peak aggregate signalling rate of approximately 20 GBit/s. This first demonstration paves the way for a practical solution to solve the electronic intra-chip interconnect bottleneck with low-cost mass-producible chip-compatible plastic micro-optical modules.

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“…Similarly, for the implementation of chip-to-chip level interconnections, the integration of free-space optical systems is one of the most important tasks [36]. Here, due to the high interconnection densities, waveguide optical approaches are not feasible.…”

Section: Board-to-board and Chip-to-chip Interconnectsmentioning

confidence: 99%

Microoptics for optical information technology

Sinzinger

Jahns

2003

Microoptics

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Demonstration of a monolithic multichannel module for multi-Gb/s intra-MCM optical interconnects

Cited by 15 publications

References 6 publications

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

Multichannel free-space intrachip optical interconnections: combining plastic micro-optical modules and VCSEL-based OE-FPGA

Microoptics for optical information technology

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