Fibre laser with doped yttrium-aluminium garnet fibre - has LED and two mirrors surrounded by sheath and sleeve

摘要

The fibre laser consists of a laser active fibre core. esp. a single crystal fibre of yttrium-aluminium garnet with a neodynium 3+ doping. Two mirrors extend over the ends of the fibre core. A led at one end of the fibre has an emission surface extending over the fibre core radiation surface covered by the mirror. A cylindrical sheath surrounds the core and is made of a low loss dielectric whose index of refraction is smaller than that of the fibres. The sheat (2) is surrounded by a sleeve (3) mirrored on the contact surface (4), and the light emitting surface (6) of the semiconductor diode (5) extends over the butt end (8) of the sheath.