PCSEL Optical Sensing – PCSEL technology, first developed in the early 2000s, was invented by a research team at Kyoto University led by Professor Susumu Noda. Compared to conventional lasers, it offers higher
functionality in a compact device. In recent years, demand has increased for higher-brightness, narrowlinewidth light sources for applications such as biomolecule sensing and breath gas analysis, driving the need for small, mass-producible infrared lasers. Together, AKM and Kyoto University sought to
optimize the light source structure, culminating in a laser oscillation in the 2 µm band using a PCSEL.
This achievement in PCSEL technology is well-suited to high-sensitivity greenhouse gas detection, as
the 2 µm wavelength band includes absorption lines associated with gases such as CO2 and CH4. By
combining this property with the high directionality and narrow linewidth of PCSEL, applications are
expected in fields requiring high-precision measurement of trace gases.
“These advancements demonstrate the strong potential of PCSEL for applications requiring high power
and precise optical control,” said Yoshinobu Fujimoto, General Manager of R&D at AKM’s Business
Development Center. “By combining AKM’s technological background with the expertise of Professor
Susumu Noda and his team at Kyoto University, we are unlocking new performance capabilities that
could benefit a wide range of applications.”
AKM has stated that it plans to accelerate research and development of 2 µm-band PCSEL technology
with a focus on manufacturability and advanced photonic crystal designs.
The research results related to this technology were presented at the Spring Meeting of the Japan
Society of Applied Physics in March 2026.
