Pigtail style collimator for 1550nm with an f=11mm aspheric lens in an 8mm OD housing, -60dB return loss, with 1 meter long, 900µm OD tight buffered 9/125µm singlemode fiber, terminated with a Super PC polished SC connector. The output beam diameter will be about 2mm with full divergence angle about 0.95mrad.
