How many kilometers is the optical module 14D

The optical module 14D typically supports a maximum transmission distance of up to 10 kilometers over single-mode fiber.

The 14D module is generally classified as a long-range (LR) optical module, which is designed for wide-area and long-distance links using single-mode fiber (SMF), allowing transmission distances of up to 10 kilometers under standard conditions . For applications requiring even longer reach, extended-range (ER) modules can achieve distances up to 40 kilometers using single-mode fiber . Key factors affecting transmission distance include:

• Fiber type: Single-mode fiber supports longer distances, while multimode fiber (MMF) is limited to shorter ranges, typically under 500 meters for high-speed modules .
• Wavelength: Modules operating at 1310nm or 1550nm can achieve longer distances due to lower fiber attenuation, whereas 850nm modules are generally limited to short-range connections .
• Signal quality and dispersion: Real-world distances may be slightly shorter than the theoretical maximum due to optical signal dispersion and losses along the fiber . In practice, the 14D module is suitable for metro networks, campus interconnects, and data center links where distances are within the 10 km range. For distances beyond this, an ER or DWDM module would be recommended to maintain signal integrity. Thus, for planning purposes, you can consider the 14D optical module capable of reliably transmitting up to 10 kilometers over single-mode fiber, with performance depending on fiber quality and network conditions .