Pigtail style collimator for 980nm, with an f=2.13mm GRIN lens in a 4mm OD housing with nominal 40dB return loss, with 1 meter long 3mm OD jacketed, 6/125um single mode fiber, terminated with a FC/SPC connector. The predicted 1/e^2 beam diameter is about 0.4 mm, with a full divergence angle of about 3mrad.
