Optical Transceiver Manufacturer,What Are The Differences Between Singlemode QSFP+ And Multimode QSFP+

What are the differences between singlemode QSFP+ and multimode QSFP+

July 19. 2018

QSFP+ have Single-mode and multimode, it means QSFP+ optical module works on different types of fiber optic, the single-mode QSFP + use with single mode fiber, and the multimode QSFP + used with multimode fiber. Then what are the differences between them? Where are they applied? What should we pay attention to when we use them? In this article, we will discuss this topic.

Optical module differences between 40G QSFP+ SR4 and 40G QSFP+ LR4

Product picture
Product name:	40Gbps 850nm 100M QSFP+ optical module	40Gbps CWDM 10KM QSFP+ optical module
encapsulated type	QSFP+	QSFP+
wave length	850nm	CWDM
CWDM	MPO	LC duplex
Fiber Type	MMF multimode fiber	MMF multimode fiber
Max transmission distance	150m（OM4 multimode fiber）	10km
Laser type	VCSEL	DFB

Product application：

Multimode QSFP+: Used for the application of multi-mode, for example, rack to rack, data center, 40G Ethernet, InfiniBand QDR, DDR and SDR.

Single-mode QSFP+: Used for the application of single mode, for example, switching points between data center and the Internet, switches, high-speed interconnection servers between routers and transmission equipment, rack to rack, 40G - LR4 Ethernet link, InfiniBand SDRS, DDR and QDR.

What should we pay attention to when we use QSFP+ optical modules of multimode and single-mode?

Ensure the QSFP+ optical module connects with the ends of the fiber jumper both are the same wavelength. A simple way to do this is the pull ring color of the module must be conformity.
In general, in order to ensure the accuracy of the data, short-wave QSFP + optical module connects with multimode optical fiber (that is the lake blue of OM3 or optical fiber jumper wire of OM4), and long wave QSFP + optical module connects with single-mode fiber (that is the yellow optical fiber jumper wire).
Do not overbend or twine cable when we using. This will increase light attenuation of the transfer process.
When we don’t use QSFP+ optical module, we must use dustproof plug to protect the aperture.

When we select QSFP+ optical module, we must confirm transmission distance and wavelength that would to be used, which will help us more effectively to choose correct QSFP+ optical module. In addition, as time goes on, the cost of optical modules is increasing, which bring budget pressures for many users. In order to save more resources, we can choose the optical modules for low cost and compatible without sacrificing quality or reliability.

ETU-Link – it is excellent optical module suppliers, provide compatible optical module, it can compatibility many brands equipment 100%, such as, cisco, Huawei, H3C, HP, juniper, Boko etc., quality assurance, it is a good choice for you absolutely.

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