Pigtail style collimator for 1300/1550nm with an f=1.81mm Grin-lens in a 4mm OD housing, with -35dB return loss, with a 1 meter long, 900µm OD cabled, 62.5/125µm Graded Index Multimode fiber (NA=0.275), terminated with an angled FC/APC connector. The predicted collimated beam diameter will be around 1.0mm at the 1/e^2 level with a full divergence angle of about 33mrad.
