This is a C-band single mode fiber laser. The source wavelength tuning range covers the C-band and achieves continuous laser output up to 89 wavelengths. (ITU-T standard wavelength, 50 GHz wavelength interval). Integrated dual FP cavity tuning etalon and high gain chip, with high output power (5~16mW), narrow linewidth, high wavelength accuracy. Special drive control circuit, high-definition color LCD screen, optional control keyboard and host computer software are also available. The user can easily tune the wavelength accurately. Can be used for DWDM system development, fiber laser, fiber optic link, optical device testing and other fields.