Toru Ukai

Title: Toru Ukai: Innovator in Optical Transceiver Technology

Introduction

Toru Ukai is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of optical transceiver technology, holding a total of 3 patents. His work focuses on improving the efficiency and functionality of optical communication systems.

Latest Patents

One of Ukai's latest patents is a method to produce an optical transceiver. This method involves controlling an optical transceiver, specifically driving a laser diode (LD) installed within the transceiver. The LD's bias current is determined by an automatic power control (APC) loop to maintain an average optical output power. Additionally, the modulation current is regulated by a feedback loop to keep the extinction ratio (ER) within a preset range. The initial condition for the modulation current is established using the T-Im characteristic, which is derived from data measured when the LD is not installed in the transceiver. This characteristic is updated based on the modulation current obtained during practical use of the optical transceiver.

Another significant patent involves an optical transceiver that features a shield member positioned between two optical sub-assemblies (OSAS). This design includes a transmitter optical sub-assembly (TOSA), a receiver optical sub-assembly (ROSA), a base member, a circuit board, and the shield member. The shield member is crafted by cutting and bending a metal sheet without the need for welding or soldering. It consists of a center partition and two sides, creating two spaces for the TOSA and ROSA. The center partition has a V-shaped cross-section that can be inserted into a cut of the circuit board, effectively shielding the ROSA from the TOSA. This shield member also provides a frame ground by maintaining contact with the base member and the cover.

Career Highlights

Toru Ukai has worked with prominent companies in the industry, including Sumitomo Electric Device Innovations, Inc. and Sumitomo Electric Industries, Limited. His experience in these organizations has contributed to his expertise in optical technologies.

Collaborations

Ukai has collaborated with notable colleagues such as Moriyasu Ichino and Tadashi Sakai. Their joint efforts have further advanced the field of optical transceivers.

Conclusion

Toru Ukai's innovative work in optical transceiver technology has led to significant advancements