Abstract
We developed a diode laser system as a laser light source for Photodynamic Therapy (PDT). PDT is considered as a suitable therapy for the coming aging society since it gives less burden to body or has less side effects. Due to laser condition problems, such as wavelength and output, there was no suitable laser system to popularize PDT and such system was eagerly awaited to be developed. Today, the laser system we newly developed was small and light weighted system with easy operation. Such features will satisfy the needs for PDT and may help to popularize PDT.
