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Showing posts from January, 2024

Optical Frequency Comb And Optical Transmission?

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  We know that since the 1990s, WDM wavelength division multiplexing technology has been used for hundreds or even thousands of kilometers of long-distance optical fiber links. For most countries, fiber optic infrastructure is their most expensive asset, while the cost of transceiver components is relatively low.   However, with the explosive growth of data transmission rates in networks such as 5G, WDM technology is also becoming increasingly important in short-distance links, which are deployed in much greater volumes and therefore have an impact on the cost of transceiver components. and size are also more sensitive. Currently, these networks still rely on thousands of single-mode optical fibers for parallel transmission through spatial division multiplexing channels, and the data rate of each channel is relatively low, only a few hundred Gbit/s (800G) at most. T-level is possible There are few applications.   But in the foreseeable future, the concept of ordinary spac...

What new changes is the global mobile communications market experiencing?

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  2023 is over. Looking back on the global mobile communications market this year, if I were asked to sum it up in one word, it would be — “accumulate and gain.” On the surface, it doesn’t seem like anything big is going on. But in fact, under the calm lake surface, there are rough waves and storms. Whether in the consumer Internet field or the industrial Internet field, communication networks are growing rapidly. There are more and more digital application scenarios surrounding the network, and network traffic is also increasing rapidly. High-quality networks represented by 5G not only bring people a pleasant digital life experience, but also promote the digital transformation wave of the entire industry. There is no proof for what we say, let’s let the data speak for itself. Not long ago, Ericsson released the latest “Ericsson Mobile Market Report (November 2023)” (hereinafter referred to as the “Report”). Ericsson’s report, released every six months, analyzes the current status ...

What types of SDM space division multiplexing optical fibers are there?

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  In the research and development of new optical fiber technology, SDM spatial division multiplexing has attracted great attention. The application of SDM in optical fiber mainly has two directions: core division multiplexing (CDM), which is transmission through the core of multi-core optical fiber. or mode division multiplexing (M DM), which transmits through the propagation modes of few-mode or multi-mode optical fiber. Core division multiplexing (CDM) optical fiber  mainly uses two solutions in principle. The first is based on the use of single-core fiber optic bundles (fiber ribbons), in which parallel single-mode optical fibers are packaged together to form fiber optic bundles or ribbon cables that can provide up to hundreds of parallel links. The second solution is based on transmitting data on a single core (single mode per core) embedded in the same fiber, i.e. in an MCF multi-core fiber. Each fiber core is considered an independent single channel. MDM (Mode Division M...