Abstract
I will review recent progress in high power, single mode, photonic-crystal surface-emitting lasers based
on photonic band-edge effect is described. After explaining principle of device operation and the ability
of generating unique beam patterns, I will describe that watt-class high-power, high-beam-quality,
surface-emitting, lasing oscillation has been successfully achieved. These results represent an important
milestone for innovation in the field of lasers because it provides a route towards overcoming limitations
in applications that suffer from low beam quality, which opens the door to a wide range of applications
in material processing, laser medicine, nonlinear optics, sensing and so on.
