The EDFL-Nano-1550-3-75-3W-COL from Nuphoton Technologies is an Erbium-Doped Nanosecond Fiber Laser that operates at a wavelength of 1550 nm. It provides an output power of 3 W. The laser produces to 75 µJ of energy per pulse with a pulse repetition rate from 40-250 kHz and has a pulse width of 3 ns. It requires a DC supply of 24 V and supports RS-232 and TTL control interfaces. This microprocessor-controlled laser is available in a module that measures 180 x 130 x 49 mm with electrical interface connectors.