November 23, 2015

Fiber Optic Transceivers – How to Classify Them?

Fiber optic transceivers serve as an optical module to facilitate photoelectric conversion where the transmitter end takes in and converts the electrical signal into light signal. They are classified into different categories based on different standards, such as the optic mode, the network management, and the power supply. The following passages discuss these standards in details.

By the Nature of Fiber Optic Mode Standard

In relation to this standard, fiber optic transceivers are available in single-mode transceivers and multi-mode transceivers

Single-mode Transceivers

Single-mode transceivers operate over single-mode fibers (SMF). And SMF has a higher tolerance for the optic used than multi-mode fibers (MMF). The fiber core is smaller and the wavelength of the laser is narrower. This means that SMF has the capacity to accommodate higher bandwidth at the much longer distance in the transmission of the optical signals. Single-mode transceivers work mainly in 1310mn and 1550mn wavelength and are mostly used in long distance transmission environment, reaching 2 km, 10 km, 40 km, 60 km, 80 km and 120 km. 10GBASE-LR just belong to this single-mode transceiver interface type. For example, Fiberstore compatible JD094B, fully compatible with HP devices, works in 1310mn with the longest data transfer distance up to 10km.

JD094B

Multi-mode Transceivers

Multi-mode transceivers work over MMF. MMF uses a much bigger core and usually uses a longer wavelength of light. Because of this, the optics used in MMF have a higher capability to gather light from the laser. In practical terms, this means the optics are cheaper. The common multi-mode SFPs work in 850nm wavelength and are only used for short distance transmission, reaching from 100 m to 500 m. 10GBASE-SR is one of the most commonly used interface types for multi-mode transceivers, like Cisco SFP-10G-SR. Fiberstore compatible Cisco SFP-10G-SR uses a 85Onm FP laser with 300m link length.

SFP-10G-SR

According to the Network Management Standard

When classify fiber optic transceivers by this standard, two prominent types occur: managed optic transceivers and unmanaged optic transceivers. The former is more expensive than the latter, but this form of transceiver offers additional network monitoring with fault detection and remote configuration functionality. As for the unmanaged optic transceiver, although this kind of transceiver doesn't provide the monitoring function as the former, it allows the devices that are connected to unmanaged optical transceivers to communicate automatically.

Based on Power Supply

This classification leads to two types: built-in switching power transceiver and eternal power supply transceiver. The built-in switching power transceiver is designed for the carrier grade power. It supports equipment power protection, filters, and a wide power supply voltage regulator, reducing the external point of failure arising from the mechanical contact. By contrast,the external power supply transceiver is made for multi-use civilian equipment, and it is compact and cheap.

Conclusion

Actually, the standards used to define fiber optic transceivers are not definitely limited to what have been talked above. Other standards can also be based upon, like the work rate, and connector type. Fiberstore provides fiber optic transceivers which are 100% compatible with such major brands as Cisco (eg.Cisco SFP-10G-SR), HP (eg. JD094B), NETGEAR (eg. NETGEAR AGM731F). Additionally, fiber optic transceivers can also be customized to meet your needs. For more information about fiber optic transceivers, you can visit Fiberstore.

Posted by: fernxu123 at 03:23 AM | No Comments | Add Comment
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