The 81654A Fabry-Perot Laser Source Module is a standard power (0 dBm) module for use with the Fabry-Perot Laser (not included). The center wavelength is 1310/1550 nm ±15 nm. It uses a standard single-mode 9 / 125 µm fiber type. The spectral bandwidth is < 3.5 nm/4.5 nm.