390 nm narrow linewidth frequency doubling fiber laser

Short Description:

Erbium group develops the narrow, non mode hopping, high power 390 nm laser series (EFA-FHG-390). EFA-FHG-390 series use 1560 nm fiber DFB laser with kHz linewidth as seed source. All-fiber amplifier amplifies the laser power. 390 nm laser is obtained through frequency doubling of periodic polarization crystal and frequency converted scheme of cascade resonant frequency doubling. Compared with the diode lasers, the EFA-FHG-390 series has the characteristics of narrow laser linewidth (Lorentz line width <50 kHz), no mode jump under a large range of temperature and vibration conditions, better laser beam quality (M² <1.3), and large output power.