Making the transition to higher bandwidth affordable

Single-fiber Bidirectional Transceivers

An Introduction to BiDi Transceivers

In the world of transceivers, BiDi stands for Bi-Directional.  In terms of SFPs, BiDi transceivers transmit at one wavelength and receive at another.  This is different from standard transceivers which use the same wavelength for transmit and receive.  BiDi SFPs connect to a fiber cable using only one simplex port, whereas standard transceivers have duplex fiber ports.

How Bidirectional Transceivers Work

BiDi modules enable two-way communication over a single optical fiber by using a WDM (wavelength-division multiplexing) filter component in the transceiver. BiDi transceivers transmit optical signals at one wavelength and receive them at a different wavelength, allowing for bi-directional transmission. For instance, BiDi transceiver A in the figure transmits 1310nm wavelength signals and receives 1490nm wavelength signals, while BiDi transceiver B does the opposite. BiDi transceivers must be used in pairs due to this configuration – identifying as an Upstream (U) and Downstream (D) to the connection.

BiDi Advantages

Reducing Fiber and Expenses

Bidirectional transceivers transmit and receive optical signals through a single fiber, saving optical fiber resources. This is useful where fiber resources are scarce and reduces the cost of cabling infrastructure. BiDi transceivers use half the fiber of conventional bidirectional optics, making them more efficient.

Flexibility in Applications

Bidirectional transceivers are useful for specific construction scenarios. When upgrading from a 3G RRU to a 4G RRU, using BiDi transceivers can utilize existing fiber resources. One fiber can be used for 3G transmission, and the other for 4G transmission, boosting network link capacity and reducing construction time.

Ease of Management

Bidirectional transceivers decrease the number of ports on the fiber patch cord panel and save space in the fiber management tray. They are also easier to maintain and repair in case of unexpected optical fiber link interruptions due to using only half of the fibers compared to traditional dual-strand fiber links.

Different versions of SFP BiDi Transceivers

SFP BiDi Transceivers

SFP BiDi transceivers are specifically intended for deploying 1.25 Gigabit Ethernet networks. Typically, short to medium-distance BiDi networks spanning 10km to 40km use a wavelength combination of 1310nm/1490nm, while long-haul BiDi SFP applications spanning 80km to 120km usually employ a wavelength combination of 1490nm/1550nm.

SFP+ BiDi Transceivers

SFP+ BiDi transceivers are specifically engineered to support 10 Gigabit Ethernet deployments. The most commonly used wavelength combination for 10G SFP+ BiDi transceivers is 1270nm/1330nm, which is employed for short to medium-distance optical fiber transmission spanning 10km to 60km. Conversely, a wavelength combination of 1490nm/1550nm is used for long-haul BiDi SFP+ applications spanning 80km to 100km.

SFP28 BiDi Transceivers

The 25G BIDI SFP28 transceivers are designed to enable bi-directional 25G serial optical data communications using either 1270nm/1330nm wavelengths. These modules are ideal for use in 25G Ethernet and CPRI applications, particularly within 5G mobile networks.

SFP BiDi Transceivers in Action

SFP+ BiDi Switch to Switch



1SFP-10G-BXD-I-GT10GBASE-BX10-D SFP+ Bidirectional for 10km Ind Temp Cisco Compatible
2GT-LCLCSS2YLC/LC Simplex Singlemode OS2 9/125 Cable
3SFP-10G-BXU-I-GT10GBASE-BX10-U SFP+ Bidirectional for 10km Ind Temp Cisco Compatible

SFP28 5G Core Network to Field Terminal

5G Core Network

Hi-Band 5G NR

Low Band 5G LTE+NR

1GTP3225-SI1025GBase-BXD SFP GE 1330nm/1270nm SMF 10KM LC DOM I-Temp
2GTP2325-SI1025GBase-BXU SFP GE 1270nm/1330nm SMF 10KM LC DOM I-Temp
3GTP3225-SI4025GBase-BXD SFP GE 1330nm/1270nm SMF 40KM LC DOM I-Temp
4GTP2325-SI4025GBase-BXU SFP GE 1270nm/1330nm SMF 40KM LC DOM I-Temp
5GT-LCLCSS2IOKLC/LC Simplex Singlemode 9/125 Indoor/Outdoor Cable

Why use GigaTech Products BiDi Solutions

At GigaTech, you can find a wide variety of BiDi transceivers that are designed to meet and exceed industry standards. Our transceiver solutions are not only reliable but also cost-effective and flexible, providing you with the ability to make necessary changes and accommodate network growth with ease. Our transceivers are tested to ensure they perform at the highest possible level and are designed to work seamlessly with your existing network infrastructure. You can trust GigaTech to provide you with transceiver solutions that will meet your needs now and in the future.

Never Sourced. Never Recycled.

All components in GigaTech Product optics are manufactured under the same roof and represent the gold standard for reliability and consistency in performance. This vertical manufacture chain allows GigaTech to avoid unnecessary variances in transceiver casing or laser quality often found with online resellers who source their components from an ever changing vendor list. The transceiver is guaranteed to be built from A-Stock never used components overseen by GigaTech Products,

Rigorous Testing & Standards Compliance

The quality and standards of our hardware is one the base foundations of GigaTech Products. All of our components comply with MSA (Multi-Source Agreement) output standards and, in many cases, excel beyond those certification standards. Every transceiver we produce is tested on active network devices to ensure they comply with OEM equipment and are verified to be plug-and-play and do not require work arounds.