JW3109 optical light source can provide 1 to 4 output wavelengths to meet specific requirements, including the 650nm red source and the 1310/ 1550nm wavelengths for single mode fiber or the 850/ 1300nm wavelengths for multimode fiber, as well as other wavelengths according to customer needs. Together with the JW3208 optical power meter, it is a perfect solution for the fiber optic network characterization. Features : - Provides 1~ 4 output wavelengths which can be optional according to customer' s needs - CW, 2Hz modulation output at 650nm, and CW, 270Hz, 1KHz, 2KHz modulation output at other wavelengths. - High stability of the output power - Stable output wavelength - Backlight LCD display supports night operation - Compact size and decent appearance - Large LCD, easy operation - Alternative 10 minutes Auto-off function conserving battery life Applications : - Maintenance in Telecom - Maintenance CATV - Fiber Optic Lab Testing - Other Fiber Optic Measurements