Pigtail style collimator for 633nm with a 1.15 meter long, 3mm OD PVC cabled, 4/125 PM fiber, a 4mm OD housing with a f=3mm GRIN lens with -25dB return loss with the other end terminated with a polished 1.8mm OD ferrule. The output beam diameter will be 0.4mm. SP: 2MM Ferrule cutoff wavelength= 600nm.
