Breadcrumb navigation

New Horizons - Career Change Research:Yusuke Sasaki

February 16, 2026

From manufacturing to solution development

Yusuke Sasaki
Principal Researcher
Advanced Network Research Laboratories

After spending 11 years researching and developing new technologies as a researcher at an optical fiber manufacturer, Sasaki joined NEC in May 2022. Since joining the company, he has been involved in the research and development of monitoring technologies using supervisory light to instantly detect errors and their locations in high-capacity communications. His research papers on this technology were accepted by OFC (Optical Fiber Communication), the world’s largest international conference on optical communications, where he presented his findings in 2024 and 2025.

Wanting to be involved in larger systems rather than components of communication systems

After completing my master’s degree in graduate school, I joined an optical fiber manufacturer in a research position. I researched multi-core optical fibers and other new technologies for about 11 years. However, since it was a manufacturer, the scope of my work was limited to the research and development of the optical fiber itself. As I repeated the cycle of designing, creating, evaluating, and announcing optical fibers at the laboratory, I developed a desire to be involved not only in the development of optical fiber but also in entire communication systems and solutions that use optical fiber, which led to my decision to change jobs.

I became interested in NEC through my conference activities. While participating in conferences related to optical fibers, I learned that NEC was involved in the kind of multi-core optical fiber research that I was engaged in as well as optical communications across a broad area from submarine cables to space, so I applied as a mid-career candidate.

After joining the company, I was surprised by the small team size. My current research group is roughly one-third the size of the team at my previous position. I was amazed that such a small number of people were able to consistently produce results. What I realized while working at NEC is that the business units are able to effectively elicit the needs of society that I might not have noticed and provide direction, which ensures that the research produces tangible results. The fact they are involved in many national projects is also a major factor. Of course, each individual researcher applies their high-level capabilities and expertise to efficiently produce research results.

However, the small number of people does not mean that we are overloaded. At my previous job, there were times when I had to work late into the night due to issues with the manufacturing process, but that hardly ever happens at NEC. I am able to work at a relaxed pace.

Conference recognition directly linked to performance evaluations

Compared to my previous job, there has been a significant change in the elements and evaluation criteria required for research. At my previous job, there was a strong connection to the manufacturing department, so the key factor was improving the manufacturing yield. While it was possible to attend conferences and submit research papers, such elements were positioned as secondary activities rather than a core part of the work, which meant that they were not an important evaluation factor as they are now.

In contrast, researchers at NEC are able to independently decide their own research themes. In some cases, we are presented with problems that we should address as a team, but we often devise research themes with the potential for commercialization based on needs identified by the business units. Whether such research efforts lead to commercialization or business development is a major point of evaluation, and recognition by conferences through research papers is also highly regarded as a way to enhance NEC’s technical and global presence.

I also submitted research papers regarding the error monitoring technology for large capacity optical communication that I worked on after joining NEC. They were accepted by OFC, the world’s largest international conference on optical communications, where I presented my findings in 2024 and 2025 to a positive reception.

Enhancing one’s own expertise to become an optical communications specialist

My present activities include the research and development of the error monitoring technology described in the research papers accepted by OFC as well as serving as the task force leader for the IOWN concept (Note) led by NTT Inc. This is a kind of subcommittee that considers the physical layer of the network within IOWN. This work requires not only my previously accumulated knowledge regarding the physical properties of optical fiber but also knowledge of higher network layers, which provides me with great fulfillment as a researcher. I truly feel that the desire I had when changing jobs of engaging in a broader range of research activities in optical communications has been fulfilled.

My goals going forward are to further enhance my current level of expertise and solidify my standing as a researcher in this field. In order to do so, I want to tackle the challenge of developing technologies that can make an impact on the world by being used more widely in everyday life. In addition to conducting long-term platform technology research and research on technologies that function during error situations, I have long wanted to realize technology development that directly benefits the people living in today’s society. I believe that I can achieve this goal with NEC’s research environment.

  • Note:
    IOWN (Innovative Optical and Wireless Network) is a concept for network and information processing infrastructure including terminals that optimizes individuals and the overall system based on all available information, utilizes innovative technologies based on light, and provides high-speed, high-capacity communications and vast computing resources, etc. “IOWN®” is a trademark or registered trademark of NTT, Inc.
  • *
    The information posted on this website is the information at the time of publication.