25G BiDi SFP28 80km LC Optical Transceiver

25G BiDi SFP28 80km LC Optical Transceiver‌

Key Features:

•  Support data rate up to 25.78125Gb/s 
•  Hot-Pluggable SFP Footprint and Single LC Connector
•  Up to 80km reach for G.652 SMF
•  EML TX and Integrated SOA & PIN TIA RX
•  Temperature Range: 1) Commercial:0°C ~70°C; 2) Industrial: -40°C ~85°C
•  Power consumption: 1) Commercial:2.2W; 2) Industrial:2.8W
•  RoHS 6 compliance
•  Compliant to IEEE 802.3cc, SFF-8472 and SFF-8419
•  Complies with EU Directive 2015/863/EU

25G BIDI 10KM	25G BIDI 20KM	25G BIDI 40KM	25G BIDI 60KM	25G  BIDI 80KM
25G	25G	25G	25G	25G
1270nm/1330nm	1270nm/1330nm	1270nm/1330nm	1295nm/1309nm	1295nm/1309nm
10KM	2KM	40KM	60KM	80KM
LC	LC	LC	LC	LC
SM	SM	SM	SM	SM
DDM	DDM	DDM	DDM	DDM
COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -20°C ~85°C	COM: 0°C ~70°C IND: -20°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C

Q1: What is a 25G SFP28 transceiver?
A1: 25G SFP28 transceiver is a compact, hot-pluggable optical module that supports 25Gbps data transmission over fiber or copper cables. It is widely used in data centers, telecom networks, and enterprise networks.

Q2: What are the key differences between SFP28 and SFP+?
A2: SFP28 supports 25Gbps speeds, while SFP+ supports 10Gbps. SFP28 is backward-compatible with SFP+ ports but requires appropriate configuration for optimal performance.

Q3: What distance can a 25G SFP28 SR transceiver cover?
A3: The 25G SFP28 SR (Short Reach) module typically supports up to 100 meters over OM4 multimode fiber (MMF).

Q4: Can 25G SFP28 modules work in 10G switches?
A4: Yes, most 25G SFP28 modules are backward-compatible with 10G SFP+ ports, but they will operate at 10Gbps speeds.

Q5: What are the common types of 25G SFP28 transceivers?
A5: SR (Short Reach) – Up to 100m over MMF
LR (Long Reach) – Up to 10km over SMF
ER (Extended Reach) – Up to 40km over SMF
Copper (DAC/AOC) – Short-distance direct attach solutions

Q6: What are the typical applications of 25G SFP28 transceivers?
A6: Data center spine-leaf architecture
5G fronthaul/midhaul networks
High-performance computing (HPC) clusters
Enterprise network upgrades from 10G to 25G

Q7: What is the wavelength of a 25G SFP28 LR transceiver?‌
A7: The 25G SFP28 LR module typically operates at ‌1310nm‌ wavelength, optimized for single-mode fiber (SMF) transmissions up to 10km.

Q8: How does 25G SFP28 compare to 100G QSFP28 in cost and performance?‌
A8: 25G SFP28 is more cost-effective for short-to-medium distances (≤10km), while 100G QSFP28 suits high-density 100G deployments.

Q9: Do 25G SFP28 modules support DDM/DOM monitoring?‌
A9: Yes, most MSA-compliant modules include ‌Digital Diagnostics Monitoring (DDM/DOM)‌ for real-time performance tracking.

Q10: What’s the future of 25G SFP28 with 50G/100G adoption?‌

About ETU-LINK 25G SFP28 Optical Module

1. The Foundation: Short-Reach and Standard Long-Reach Modules
(1). 25G SFP28 SR: Designed for multi-mode fiber (MMF) with an 850nm wavelength, the SFP-25G-SR-S module typically reaches 100 meters over OM4 and 70m over OM3. It is the go-to solution for top-of-rack switching and intra-data center links.
(2). 25G SFP28 LR: The standard long-reach module for single-mode fiber (SMF). It uses a 1310nm wavelength to achieve distances of up to 10km, making it ideal for campus data center interconnects (DCI).

 2. The Fiber Multiplier: 25G SFP28 BiDi Technology
(1).  How it Works: A typical 25G SFP28 BiDi module pair might use TX 1295nm / RX 1309nm on one end and the inverse (TX 1309nm / RX 1295nm) on the other. Other common pairs include 1310nm/1270nm.
(2). Distance Variants: BiDi technology is available for a wide range of distances, making it incredibly versatile:
  A. 10km: For campus links (SFP28 BiDi 10km optical module).
  B. 20km & 40km: For metro access and longer DCI (25g bidi sfp 20km, 25g bidi sfp28 40km).
  C. 80km: For long-haul transport and regional DCI (SFP28 BiDi 80km, SFP28-25G-BX80). These often require high-performance optics and are sometimes labeled as 25GBASE-ZR BIDI SFP28 Module.

 3. Maximizing Fiber Capacity: 25G CWDM & DWDM Solutions
(1). 25G SFP28 CWDM: Coarse WDM utilizes up to 18 channels in the spectrum from 1270nm to 1610nm. 25g cwdm modules are a cost-effective way to increase capacity on a fiber pair for distances of 20km to 40km.
(2). 25G SFP28 DWDM: Dense WDM packs up to 96 channels on a single fiber pair with very tight channel spacing. 25g dwdm sfp modules are the foundation of high-capacity, long-haul networks.

4. Key Selection Criteria for 25G SFP28 Modules
(1). Brand Compatibility & Multi-Vendor Interoperability: Ensuring the transceiver is fully compatible with your switch hardware is paramount. Modules are available for all major brands.
(2). Transmission Distance: Precisely match the module's capability to your physical link length to ensure reliability and avoid unnecessary cost.
(3).  Fiber Type and Topology: Confirm the use of MMF for SR or SMF for LR/BiDi/WDM. For BiDi, ensure you have the correct wavelength pair.
(4). Digital Diagnostic Monitoring (DDM): Most modern SFP28 modules provide real-time monitoring of temperature, voltage, laser bias, and transmit/receive power, which is crucial for network management and troubleshooting.

The 25G SFP28 ecosystem offers a transceiver for every application, from the simplicity of a SFP-25G-SR-S in a server rack to the sophisticated capacity of a DWDM system spanning.