As one division of a companies,research institutes and colleges union, knowledge-based DIGCO® (former Darkhorse Industrial Group Co., Limited)specializes in optical materials in-house growing and supplying,especially erbium doped phosphate glass rods,slabs and other ones shaped as required for specific application of laser transmitters.Our products include Er3+ Yb3+ co-doped phosphate glass for diode pumped solid state(DPSS) lasers ， Er3+ Yb3+ Cr...