Pigtail style collimator for 1300-1550nm with a 3 meter long, 900 micron OD jacketed, 9/125 SM fiber, a 4mm OD housing with a f=1.81mm GRIN lens with -60dB return loss and no connector. The output beam diameter will be 0.4mm. SP: Use speical angle cut GRIN lens. IL<4dB across 60mm gap.
