Laser Components has released the PD-LD, a fibre pigtailed laser diode which has successfully coupled 5mW of green light from a 520nm laser diode into a tiny 2.2µm core diameter fibre. It is a challenge to get a good coupling efficiency with 2.2µm core fibre, however for many applications a true single-mode beam is a priority. Applications for such a device would be for alignment of IR laser systems such as CO2 and Nd:YAG systems often as an alternative to red alignment lasers, appearing multiple times brighter to the human eye whilst ensuring eye safety.
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