The Blue-DE-44x from Ushio Opto Semiconductors is a Necsel Blue Direct Emitting Laser that operates from 440 to 449 nm. It provides an output power of 10 W and has a power conversion efficiency of up to 28%. The fiber core of the laser has a diameter of 0.400 mm and a numerical aperture of 0.22. It has a threshold current of up to 350 mA and a lifetime of 20,000 hours. The laser is available in a fiber-coupled package with SMA-905 connectors and is ideal for digital projection, remote source lighting, hazardous lighting, phosphor illumination, laser light shows, medical, and forensics applications.