Check the listing for details. Digital Multi-wavelength Optical Light Source 850/1300/1310/1550nm Wavelength. Condition: New. Listed at 259.00 USD. Portable Optical Light Source Laser Source with 850/1300/1310/1550nm Wavelength Product Description:The optical light source can provide 1 to 4 output wavelengths to meet specific requirements, including the 1310/1550nm wavelengths for single mode fiber or the 850/1300nm wavelengths for multi mode fiber, as well as other wavelengths according to customers needs. Together with the 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 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 Specification:Wavelengths(nm)850/1300/1310/1550 Emitter TypeFP-LD,LED or others please specifyTypical Output Power (dBm)-20dBmOutput Stability±0.05dB/15mins; ±0.1dB/ 8hoursModulation FrequenciesCW,270Hz,1KHz,2KHzOptical ConnectorFC/PCPower SupplyAlkaline Battery(3 AA 1.5V batteries)Operating Temperature(°C)-10~+60Storage Temperature(°C)-25~+70Dimension(mm)152x74x26Weight (g)180This handheld light source can be used in conjunction with our companion optical power meter to measure optical loss in singlemode and multimode fiber optic cables.