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C.Fukunaga, TGC electronics meeting at CERN May 14,2000 G-Link study G-link will be used between Hi-Pt and Sector Logic in USA15 –Length: ~80m –Bandwidth:20bit*40MHz=0.8Gb/s.

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Presentation on theme: "C.Fukunaga, TGC electronics meeting at CERN May 14,2000 G-Link study G-link will be used between Hi-Pt and Sector Logic in USA15 –Length: ~80m –Bandwidth:20bit*40MHz=0.8Gb/s."— Presentation transcript:

1 C.Fukunaga, TGC electronics meeting at CERN May 14,2000 G-Link study G-link will be used between Hi-Pt and Sector Logic in USA15 –Length: ~80m –Bandwidth:20bit*40MHz=0.8Gb/s (Gbit Ethernet) Its well-established technique will be easily adopted to our system development. But need another refinement for choice of VCSEL and optical fiber.

2 C.Fukunaga, TGC electronics meeting at CERN May 14,2000 Generic G-link VCSEL PIN-diode

3 C.Fukunaga, TGC electronics meeting at CERN May 14,2000 VCSEL Laser Diode Vertical Cavity Surface Emitting Laser High bandwidth (1-10Gbps) Surface emitter –Good connectivity with optical fibre –Emission test on wafer -cheap High output power/low power consumption Yet a few products for 850nm light emission Laser emission

4 C.Fukunaga, TGC electronics meeting at CERN May 14,2000 Optical Fibre Low divergence, circular beam profile from vcsel is appropriate for multimode fibre Recent technical development of GB/10Gb Ethernet makes easier to select appropriate fibre (IEEE 802.3z 1000BASE-SX complied;Core/Outer radii 50/125um;Graded index). Fibres with 1Gb/s are (will be soon) available. Surface emissionEdge Emission

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