The LBT-50K-3G-25-15-M14 from L3 Narda-MITEQ is a Fiber Optic Transmitter with Bandwidth 50 kHz to 3 GHz, RF Input Power -14 to 10 dBm, Wavelength Range 1540 to 1560 nm, Output Optical Power 10 dBm, Spectral Width 0.1 nm. More details for LBT-50K-3G-25-15-M14 can be seen below.