Fiber Optic Transceivers

Short Range Optical Transceivers for 10GbE, 40GbE and 100GbE

In order to satisfy the rapidly increasing demand for higher speed data transmission both in telecom and datacome networks, Ethernet network has evolved from 1GbE, to 10GbE to 40GbE or even 100GbE. Optical transceiver, especially short range optical transceiver, as a cost-efficient and convenient solution to achieve different data rates, is being widely used in today’s 10GbE, 40GbE and 100GbE infrastructures. This post aims to introduce the short range optical transceivers for 10GbE, 40GbE and 100GbE.

10GBase-SR Optical Transceiver

10GBase-SR optical transceiver is the original and still by far the most commonly used multimode optics. As it uses a single, low cost solid state laser assembly, it is also the least expensive of the optical modules available for a 10GbE platform. 10GBase-SR transceiver module typically uses SFP+ form factor with duplex LC connector, which can support 10GbE transmission over standard multimode fiber (MMF) with distances of 33 m on OM1 and 86 m on OM2. Using 2000 MHz/km OM3, up to 300-m link lengths are possible, and using 4700 MHz/km OM4, up to 400 meter link lengths are possible. This type of 10G optical transceiver is highly recommended in any new deployment of OM3 or OM4 multimode fibers to ensure an easier transition to 10GbE for future needs. The following image shows how 10GBase-SR optical transceiver works.

working principle of 10gbase-sr optical transceiver

40GBase-SR4 Optical Transceiver

As we all know, 40G optical transceiver typically uses four 10G lanes to transmit and four 10G lanes to receive, over 12-fiber assembly providing the aggregate 40G bandwidth, leaving the middle four fibers remain unused as shown in the image below. 40GBase-SR optical transceiver was released by IEEE standard 802.3ba in 2010, which is generally QSFP+ form factors, primarily enabling high-bandwidth 40GbE optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors. It can support link lengths of 100 meters and 150 meters over OM3 and OM4 multimode fibers respectively. Besides, 40GBase-SR4 QSFP+ transceiver can also be used to connect with four 10GBase-SR optical interfaces using an 8-fiber MTP to 4 duplex LC cable.

working principle of 40GBase-SR4 optical transceiver

100GBase-SR10 Optical Transceiver

100GBase-SR10 is defined as 10 wavelengths across 10 parallel fiber paths at 10Gbps on multimode fiber. CFP is the typical representative form factors of 100GBase-SR10. 100GBase-SR10 CFP uses a 24-fiber MPO/MTP cable for connectivity: ten fibers for transmitting and ten fibers for receiving. Like 40GBase-SR4 QSFP+, 100GBase-SR10 CFP can support link lengths of 100 m and 150 m respectively on laser-optimized OM3 and OM4 multifiber cables, primarily enabling high-bandwidth 100G over 24-fiber ribbon cables terminated with MPO/MTP connectors. Besides, it can also be used in 10 x 10G mode along with ribbon to duplex fiber breakout cables for connectivity to ten 10GBase-SR optical interfaces. Here is a picture about working principle of 100GBase-SR10 optical transceiver.

working principle of 100GBase-SR10 optical transceiver

Third-Party Short Range Optical Transceivers in Fiberstore

As the demand for upgrading networks increases, there will be plenty of short range optical transceivers needed, but it is known that original brand short range optical transceivers, like Cisco brand transceivers, are expensive, which will be a headache for IT managers. In this case, third party short range optical transceivers that are more cost-effective will be required. “Third-Party” means a supplier or service provider who is not directly controlled by either the seller (first party) or the customer/buyer (second party) in a business transaction. Fiberstore offers all the third-party short range optical transceivers that we have mentioned above. All these modules have been fully tested in original brand switches to ensure the compatibility and quality.

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