Do you really know “1000BASE-LX/LH SFP”?

1000BASE-LX/LH SFP, one of the commonly used fiber optic transceivers, is now widely used in optical transmission systems. With the development of 40/100G Ethernet, even 400G Ethernet, this kind of transceiver module is nothing new to the module users. However, few people can deliver a clear answer to the question of what "1000BASE-LX/LH" infers. Well, if you know what it means, congratulations! you are the one of the few. You can skip today's contents or share your experience to us in the comment. Actually, this post is a simple reference source for the beginners in this field or those who are lack of knowledge with fiber optic transceiver but have a strong interest in it.

To begin with, I'd like to make a brief introduction of 1000BASE-LX/LH SFP transceiver. This kind of SFP is similar with the other SFPs in basic working principle and size. But it is compatible with the IEEE 802.3z 1000BASE-LX standard, operating on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. In addition, when used over legacy multimode fiber type, the transmitter should be coupled through a mode conditioning patch cable.

As we know, an optical transceiver module is generally either made for single mode (long distance) or multimode (short distance). But 1000BASE-LX/LH SFP can be used for both singlemode and multimode. In fact, the Ethernet standard defines this optical interface specification as 1000BASE-LX10. However, many vendors as a proprietary extension called either 1000BASE-LX/LH or 1000BASE-LH before it was standardized. Thus, we often see 1000BASE-LX/LH rather than 1000BASE-LX10.

In a word, 1000BASE-LX/LH SFP has two identities. It is single mode by design, but when it gets together with its friend "mode conditioning patch cable", it can also be used for multimode application. This patch cable inserts a single to multi splice on the transmit path, to "fill" the multimode fiber with light. It is more expensive than normal patch cables, but is necessary if using these on multimode fiber. At present, 1000BASE-LX/LH SFP is the only one kind of fiber optic transceivers which can be used for both singlemode and multimode applications. And these applications are depending on what fiber you use.

Originally published at: www.fiber-optic-transceiver-module.com/do-you-really-know-1000base-lxlh-sfp.html

Fiberstore Compatible 1000BASE-LX/LH SFP modules

1000BASE-LX/LH was standardized six years after the initial gigabit fiber versions as part of the Ethernet in the First Mile task group. It is very similar to 1000BASE-LX, but achieves longer distances up to 10 km over a pair of single-mode fiber due to higher quality optics. The 1000BASE-LX/LH SFP module, compatible with the IEEE 802.3z 1000BASE-LX standard, operates on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. Duplex LC/PC connector.

Features

• Compliant with SFP MSA standard
• Compliant with IEEE 802.3z
• +3.3V single power supply and TTL Logic Interface
• 10km with 9/125 µm SMF
• 1310nm FP laser and PIN photodetector for 10km transmission
• Hot-pluggable SFP footprint duplex LC connector Interface
• Class 1 FDA and IEC60825-1 Laser Safety Compliant
• Duplex LC connector
• Compliant with SFF-8472
• ROHS compliant
• Average Output Power:-9~ -3dBm
• Receiver Sensitivity:-21dBm

Applications

• 1000BASE-LX/LH Ethernet
• Data storage networks

Fiberstore 1000Base-LX/LH SFP module over single-mode fiber, which is a high performance and cost effective transceiver. It is designed to meet Gigabit Ethernet (1000Base) application. The transceiver consists two sections: the transmitter section consists of a high reliability 1310nm FP LD with monitor photo detector (MPD) in eye safety; the receiver section consists of a high-speed InGaAs PIN photodiode (PD) and trans-impedance preamplifier. The output of the PD drives the post-amplification, quantizing, and optical signal detection circuits. The receiver is built in the LOS monitoring function. For further information, please see SFP MSA and SFF-8472 standard.

With plenty experience in interoperability with 3rd party standard based network equipment such as Cisco, HP, Finisar, Juniper, Netgear, 3 Com, Alcatel-Lucent, D-LINK, Extreme, and HuaWei, Fiberstore’s fiber optic transceiver are able to fulfill enterprises, service providers, telecom operators and SAN providers to build and fulfill their existing and future network expansions.

Compatible Fiber Optic Transceiver List

Brand	Model	Description
Brocade	E1MG-LX-OM	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Cisco	GLC-LH-SM	1000BASE-LX/LH SFP SMF 1310nm 10km LC
Cisco	GLC-LH-SMD	1000BASE-LX/LH SFP SMF 1310nm 10km LC EXT DDM
Dell	320-2879	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Extreme	Extreme 10052	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Finisar	FTLF1318P3BTL	1000BASE-LX/LH SFP SMF 1310nm 10km LC DDM IND
HP	JD119B	1000BASE-LX SFP SMF 1310nm 10km LC DDM
HP	J4859C	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper	EX-SFP-1GE-LX	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper	JX-SFP-1GE-LX	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Netgear	AGM732F	1000BASE-LX SFP SMF 1310nm 10km LC DDM

To save more money, We suggest that compatible 3rd transceiver modules may be another good choice however, you should make sure that your vendor is reliable. Fiberstore's SFP transceivers are 100% compatible with major brands, they are backed by a lifetime warranty so that you can buy with confidence. Additionally, customize SFP transceivers to fit your specific requirements are available. If you have any requirement of transceivers, Fiberstore will be a good choice for you.

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