KLS-35 Optical Light Source for FTTH Fiber Optic Cable Testing

The KLS-35 Optical Light Source is a professional handheld fiber optic testing instrument designed for optical loss measurement, fiber link commissioning, and network maintenance. It provides stable optical output with multiple wavelength options for single-mode, multimode, and PON fiber networks, making it an ideal companion to optical power meters during fiber optic testing. Available in single-mode (1310/1550nm), multimode (850/1300nm), combined SM/MM (850/1300/1310/1550nm), and PON (1310/1490/1550nm) versions, the KLS-35 delivers a typical output power of ≥-5dBm with excellent stability. It supports Continuous Wave (CW), 270Hz, 1kHz, and 2kHz modulation modes for accurate fiber identification and insertion loss measurement. Designed with a rugged silicone protective case, large backlit LCD display, one-button operation, and automatic power-off function, the KLS-35 is an ideal solution for FTTH deployment, telecom maintenance, ISP projects, data centers, and fiber optic network installation.