Koji Terada

High power and high sensitivity planar lightwave circuit module incorporating a novel passive alignment method

A high-power, high-sensitivity planar lightwave circuit (PLC) module, comprising a laser diode (LD) and a photodiode (PD) surface mounted on a PLC platform, has been realized by a novel passive alignment technique. We used a spot-size transformed LD and a corner-illuminated PD to form a highly efficient optical coupling between the devices and a PLC waveguide. We used the unique marker alignment method to ensure accurate positioning of them. The positioning precision achieved in the lateral direction was within 1 /spl mu/m for the LDs and within 10 /spl mu/m for the PDs. The rotational precision was within 0.4/spl deg/ for both chips. We realized high power operation (>8 mW) with a high receiver sensitivity (0.3 A/W). In this paper, we describe a high power, high sensitivity PLC incorporating a novel passive optical alignment technique for LDs and PDs.

10-Gbps x 4-ch small optical transmitter modules using VCSEL on thin FPC film

We propose a novel assembly technique for compact and cost-effective arrayed optical modules. A compact 10-Gbps times 4-ch transmitter module that uses this technique has been successfully demonstrated.