Tomoyuki Hino

High-density and Low-cost 10-Gbps x 12ch Optical Modules for High-end Optical Interconnect Applications

We demonstrated 10-Gbps/ch operation of high-density and low-cost 12-channel optical modules. High-Δ bent fiber connector is butt-coupled with OE-substrate. Fabricated module is as small as 10 mm x 10 mm footprint with thickness of 6 mm.

10-Gb/s × 12-ch downsized optical modules with electrical conductive film connector

We demonstrate 10-Gb/s/ch operations of high-density, low-cost 12-channel optical modules for optical interconnections. These optical modules that we developed are designed to be pluggable into cards with an electrical connector. These pluggable modules will enable cards to be manufactured much more easily since they allow the manufacturing processes of optical modules and cards to be separated. An electrical connector with a clamp spring is used to connect a ceramic substrate with a printed circuit board (PCB). An anisotropic conductive film (ACF) is used to transmit electrical signals between the ceramic substrate and the PCB. To achieve optical coupling, optical fibers are butt-coupled with optical devices mounted in a cavity on the ceramic substrate. Alignment between the twelve optical fibers and the 12-channel optical device is achieved using guide pins fabricated in the ceramic substrate and guide holes fabricated in the optical connector.

Self-Alignment of Optical Devices With Fiber for Low-Cost Optical Interconnect Modules

We propose a novel self-alignment process of optical devices with optical fiber. A vertical-cavity surface-emitting laser (VCSEL) was automatically coupled with a multimode fiber (MMF) through the surface tension of a liquid adhesive within 1.5 s. Misalignment between the center of the VCSEL and the fiber was measured to be 15 mum, which is acceptable for coupling the VCSEL with the MMF. High-speed pulse modulation of the self-aligned VCSEL up to 5 Gb/s, as well as at 1 Gb/s, was demonstrated. The average optical output power was as high as -5.9 dBm at 1 Gb/s.

A Study on Coupling Efficiency between VCSEL and 45°-angled mirror component for Low-cost and High-density 10Gbps/ch Optical Parallel Link Module

We analyzed the coupling efficiency between VCSEL and a optical component with high-delta fibers experimentally. The high-delta fiber was able to relax restrictions in alignment between fibers and VCSEL because of the increase of NA.

8x48 Transponder Aggregator Subsystem Using Silicon Switch Modules for Flexible Photonic Network

We present 8×48 Transponder Aggregator subsystem using compact 8×8 silicon photonic switch modules and simple control circuit. Averaged optical insertion loss of 25.1 dB on all optical paths and 1.2-ms switching speed are achieved.