The DL-PCMMFC-TT-U-VV-W-X-Y-Z from DenseLight Semiconductors is a Fiber Optic Coupler with Wavelength 1064 nm, Optical Power 0 to 0.3, (300 mW), Return Loss 35 dB, Operating Temperature -5 to 70 Degree C, Storage Temperature -40 to 85 Degree C. More details for DL-PCMMFC-TT-U-VV-W-X-Y-Z can be seen below.