Pigtail style laser diode to fiber coupler using a 130mW 660nm laser diode with 30% coupling efficiency (40mW minimum output power from the fiber), with a 1 meter long, 900µm OD loose tube jacketed 4/125 singlemode fiber terminated with an FC/APC connector. The coupler return loss is -40dB. The coupler housing includes a 25.4mm x 15mm mounting flange. Driver electronics not included.