The 1.25G BiDi SFP transceiver modules enable Gigabit Ethernet (1000BASE‑BX) connectivity over a single strand of single‑mode fiber (SMF) using dual wavelengths for transmit and receive.
They offer full‑duplex 1.25 Gb/s operation over distances up to 120 km through a simplex LC connector, cutting fiber usage by 50%. Compliant with IEEE 802.3z, SFF‑8472, and SFP MSA, these modules are engineered for cost‑efficient FTTx, Metro Ethernet, and access networks requiring optimized fiber utilization.
Technical Specifications
- Data Rate: 1.25 Gbps (Gigabit Ethernet / 1G FC)
- Wavelength Pairs: 1270 nm Tx / 1330 nm Rx or 1330 nm Tx / 1270 nm Rx (also 1490/1550 pairs for long reach)
- Transmission Distance: 10 km, 20 km, 40 km, 80 km, and 120 km over SMF
- Connector Type: Simplex LC (single fiber)
- Laser Type: FP or DFB Tx · PIN or APD Rx
- Power Consumption: ≤ 1.0 W
- DDM/DOM: Available per SFF‑8472 for digital diagnostic monitoring
- Compliance: IEEE 802.3z (1000BASE‑BX) · SFP MSA · RoHS 6 · EMC Directive · FCC Part 15 Class B
Main Features
- Single‑fiber BiDi design reduces infrastructure and deployment costs by 50%
- Supports full‑duplex 1.25 Gbps links for Gigabit Ethernet or 1G Fibre Channel
- Transmission range from 10 km to 120 km using high‑performance DFB/APD optics
- Hot‑pluggable SFP form factor for easy installation and replacement
- Compatible Tx/Rx pairs ensure seamless point‑to‑point connection
- Optional DDM for real‑time temperature and optical power monitoring
- Interoperable with Cisco, Juniper, HP, Huawei, Nokia and other mainstream switch brands
- Industrial‑temperature models available (−40 °C to +85 °C) for rugged environments
Applications
- FTTx access and Metro Ethernet nodes
- Gigabit uplink ports in enterprise switches and media converters
- Single‑fiber LAN backbones and campus interconnects
- Telecom aggregation backhaul and industrial networking devices
- Optical redundancy and link extension where fiber resources are limited
Related Keywords: 1.25G BiDi SFP, 1000BASE‑BX SFP, Gigabit BiDi single‑fiber transceiver, 1G BiDi SFP module, MEFiber single‑fiber SFP, SFP 1.25 Gbps BiDi.
FAQ – 1.25G BiDi SFP Modules
1. What is a 1.25G BiDi SFP module?
It is a Gigabit‑rate SFP that transmits and receives data over a single fiber, using different wavelengths for Tx/Rx channels on a simplex LC connector.
2. How does the BiDi SFP operate using one fiber?
It uses Wavelength Division Multiplexing (WDM) filters to combine and split optical signals so that one fiber handles both directions simultaneously.
3. What wavelength pairs are available for 1.25G BiDi SFPs?
Common pairs include 1270/1330 nm and 1330/1270 nm for standard distance links, and 1490/1550 nm for long‑reach applications.
4. What is the maximum distance supported?
Depending on the optical budget and component choice, BiDi SFPs can support from 10 km to 120 km transmission over single‑mode fiber.
5. Can 1.25G BiDi SFPs be used with regular duplex SFPs?
No. Each BiDi module must be paired with its complementary counterpart using inverse Tx/Rx wavelengths for proper communication.
6. Do 1.25G BiDi SFP modules support digital diagnostic monitoring?
Yes. Most models support SFF‑8472 DDM/DOM for real‑time monitoring of temperature, voltage, and optical power levels.
7. Are industrial‑temperature BiDi SFPs available?
Industrial (−40 °C to +85 °C) versions are available for outdoor and industrial network applications.
8. Where are 1.25G BiDi SFPs typically used?
They are deployed in FTTx, Metro access, and enterprise networks requiring gigabit connectivity when fiber runs are limited to a single strand.
1.25G BiDi SFP Transceivers Modules
1.25G BiDi SFP Transceivers Modules