Laser Source TW3109 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 TW3208 Optical Power Meter, it is a perfect solution for the fiber optic network characterization. Features: CW, 2Hz modulation output at 650nm, and CW, 270Hz,1KHz,2KHzmodulation output at other wavelengths. Provides 1~4 output wavelengths which can be optional according to customer’s needs High stability of the output power Stable output wavelength Backlight LCD display supports night operation Compact size and decent appearance Large LCD, easy operation Applications:Maintenance in Telecom Maintenance CATV Test Lab of optical fibers Other Fiber Optic Measurements