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Do you know how many fiber types?

There are many fiber types, but two main fiber types: single mode fibers (SM) and Multi-mode fibers (MM).

For G.657 fibers, there are four sub-types: G.657A1, G.657A2, G.657B2 and G.657B3.
“1”, “2” and “3” mean the minimum bending radius.
The mininum bending radius of G.657 fibers as follows:

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How to manufacture optical fiber?

Both the core and the cladding of an optical fiber are made of highly purified silica glass. An optical fiber is manufactured from silicon dioxide by either of two methods. The first, the crucible method, in which powdered silica is melted, produces fatter, multimode fibers suitable for short-distance transmission of many light wave signals. The second, the vapor deposition process, creates a solid cylinder of core and cladding material that is then heated and drawn into a thinner, single-mode fiber for long-distance communication.

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Do you know this optical fiber cable code from NEC 2020

In the latest National Electrical Code 2020, there are Optical fiber cables with the following classification: OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC. The following article briefly introduces these cable codes:

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Tunable Transceiver

Most fiber optic transceivers we are using in the WDM transmission system are with fixed wavelength, neither a CWDM or DWDM wavelength. It will result in a huge back system in the case a certain transceiver is broken. while a tunable DWDM transceiver is an idea solution for it since it is able to adjust the wavelengths according to the lambda requirement of the system.

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Introduction to Cable Jacket of MPO and MTP Patch Cord

LSZH (low smoke zero halogen), or with variant name called LSHF (Low Smoke Halogen Free) and LS0H Cable (Low Smoke 0 (zero) Halogen). The LSZH Cables is manufactured from thermoplastic compounds, it emits very little smoke when burnt, beside it Low Smoke Zero Halogen cable is that they are much lighter to work with and are more environmentally friendly.

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Optical Interface for QSFP-DD Bidi Transceivers

Currently, 400G QSFP-DD transceivers use 8 pairs of MMF to transmit signal in short distance, while bidirectional (BiDi) technology enables users to save the fibers for new data center deployment or maximize their usage of the existing fiber cabling infrastructure. the following article briefly explains the latest connector for QSFP-DD BIDI transceivers.

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Coexistence-Type WDM-PON modules For GPON, XGS-PON, NG-PON2, OTDR

The next-generation NG-PON should satisfy demands for increasing traffic and higher bandwidths. All future strategies for NG-PON evolution are expected to deploy WDM. The candidate systems are based on evolutionary growth. Current GPON systems are intended to migrate to NG-PON applying identical colorless ONTs. The migration would occur in the same optical distribution network which implies coexistence. The advantage appears in cost saving, easier planning, maintaining and expanding of this network. The evolutionary growth under NG-PON is based on the demand of the minimal equipment investments. NG-PON should operate with the same infrastructure as GPON. However, coexistence should be supported by some preventative measures to avoid interferences between downstream and upstream channels of GPON and NG-PON. Therefore, current GPON and NG-PON coexistence requires wavelength separation of signals assigned for ONTs of GPON, 10 Gbit PON (called: XG-PON) and WDM-PON. Low-cost WDM are required for the wavelength band separation to ensure that GPON ONTs can operate undisturbed alongside NG-PON deployments. Thin-film passive filters (TFF) are suitable low-cost, ONT-independent (i.e. coexisting) and simple operation candidates.

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A QSFP-DD Optical Transceiver with double density features, it refers doubling the number of high speed transmitter and receiver for the optical signal transmitting. The QSFP-DD transceivers is ready for the new PAM4 function for supporting 50Gbps per channel, which could support bandwidth over 400Gbps via MPO/MTP fiber interface or Duplex LC fiber interface.

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Which UTP Cable wire gauge should i choose? AWG24, AWG26 or AWG28

When purchasing a Cat5e, Cat6 or Cat6a Ethernet cable, different vender might offer UTP cable with different AWG (America Wire Gauge). What is AWG and which AWG should I choose?

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Gran avance! El nuevo cable con fugas Zhongtian ayudando a que la primera cobertura 5G del túnel del metro del país tenga éxito

Recientemente, la torre de hierro de enan fue la primera en resolver el problema de la cobertura 5G del túnel de metro de la línea 5 del metro de hengzhou, convirtiéndose en la primera línea de metro en el país que ha logrado la cobertura completa de la señal 5G de los tres operadores de elefonía móvil, nicom y elecomunicaciones. 5/4 nueva fuga de cable 5G proporcionada por Zhongtian Technoloía Transmisión de señal y portadora de transmisiónde 5G del proyecto.

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