Detailed written specifications are required in the process of manufacturing and installing products to ensure the smooth progress, especially for those sophisticated fiber optical products. Take single-mode fiber cables for example, OS1 and OS2 terminologies are applied by fiber optic cable manufacturers to make sure that products are qualified and suitable for applications. Are you familiar with the OS1 and OS2 specifications? The following passages will clarify these two standards in details.

OS1 and OS2 are terminologies which describe single-mode optical fiber specifications. First introduced in the year 2002, OS1 refers to a very old specification for single-mode fiber. The characteristics of OS1 single-mode fibers are compliant with ITU-T G.652A or ITU-T G.652B. Besides, G.652C and G.652D categorized in ITU-T recommendations are also under OS1 fibers, which make OS1 a general term used to specify single-mode optical fibers that come under the heading of ITU-T G.652. This means that OS1 includes all the single-mode fiber cables that are compliant with ITU-T G.652, while OS2 requires single-mode fiber cables to be compliant with G.652C and G.652D categorized in ITU-T recommendations.

Respective Applications of OS1 And OS2 Categories

Category OS1 cable is intended for indoor or internal use, such as campus, data center Its transmission distance can reach up to 2,000 meters with speed ranging from 1 to 10 Gigabit Ethernet. Category OS2 cable is suitable for such outdoor or external solutions as street and underground. Compared with OS2 outdoor fiber cable, OS1 fiber cable experiences greater loss per kilometer, leading to a lower price of OS1 fiber than OS2 The following table shows attenuation of 1.0db/km for OS1 compared to 0.4db/km for OS2 outdoor cable.

Actually, while classifying single-mode fiber cables, other different standards are also applicable. In terms of connector construction, single-mode fiber cables are designed in FC, SC, ST, LC, etc. Among these types, single-mode fiber cable with LC connector is more often used to support Gigabit Ethernet applications for up to 10 kilometers. According to number of fibers and connectors, single-mode simplex fiber and single-mode duplex fiber are available in categories. Besides these types, ribbon single mode fiber cables are also supplied in Fiberstore. For more information about single-mode fiber cables, please visit Fiberstore.

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