2024-03-04
01The differences between single-mode fiber and multi-mode fiber?
(1) Single-mode fiber uses solid-state lasers as the light source, while multi-mode fiber uses light-emitting diodes (LEDs).
(2) Single-mode fiber has a wider transmission bandwidth and longer transmission distance capability, but requires high-cost laser sources. On the other hand, multi-mode fiber has lower transmission speed and shorter distance capability, but is more cost-effective.
(3) Single-mode fiber has a smaller core diameter and dispersion, supporting only single-mode transmission.
(4) Multi-mode fiber has a larger core diameter and dispersion, allowing for multiple mode transmissions.
The core of multi-mode fiber optic cable is thicker, hence the relatively higher price.
02The differences between single-mode and multi-mode optical modules are as follows？
(1)The operating wavelength of multi-mode optical modules is 850nm, while single-mode optical modules operate at wavelengths of 1310nm and 1550nm respectively.
(2)The number of components used in single-mode optical modules is double that of multi-mode optical modules, resulting in higher overall costs for single-mode modules compared to multi-mode modules.
(3)The transmission distance of single-mode optical modules can reach up to 100km, whereas multi-mode optical modules typically have a transmission distance of only 2km.
03In which fields are single-mode and multi-mode optical fibers, as well as single-mode and multi-mode optical modules, applied?
(1) Single-mode fiber is typically used for long-distance data transmission because it can directly transmit light signals to the center, while multi-mode fiber is commonly used for short-distance data transmission because light signals propagate through multiple paths.
(2) Single-mode optical modules are commonly found in metropolitan area networks (MANs), suitable for long-distance transmission and high-speed requirements. Multi-mode optical modules are primarily used for short-distance transmission.
04Can single-mode/multi-mode fibers be used with single-mode/multi-mode optical modules?
(1) The results of mixing single-mode/multi-mode fibers with single-mode/multi-mode optical modules are shown in the table below. Please take a look first.
05Can multi-mode fiber be used with single-mode optical modules?
No. In the test results table, we found that although connecting single-mode optical modules to multi-mode fibers may seem feasible, it cannot guarantee their working effectiveness in reality. Therefore, it is best to pair multi-mode fibers with multi-mode optical modules. This is because the conversion between fiber and optical modules must meet corresponding wavelength and light transmission and reception functions to ensure the functionality and effectiveness of optoelectronic conversion.
Let's summarize again: The main differences between single-mode and multi-mode fibers lie in transmission distance, transmission mode, and cost; while single-mode and multi-mode optical modules must be used together with matching fibers and cannot be mixed.
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