As optical communication networks evolve toward higher speeds, greater capacity, and enhanced reliability, Wavelength Division Multiplexing (WDM) and high-capacity transmission technologies have emerged as the core architecture of optical access networks. These technologies provide robust support for 5G/6G deployments, data center interconnects, and enterprise network infrastructure.
As the core component responsible for optoelectronic conversion, wavelength bearing and signal transmission in the system, optical transceiver directly determine network bandwidth, transmission distance and construction costs, serving as essential hardware for WDM high capacity transmission systems.
Let’s explore the different types of optical transceivers for WDM and high-capacity transmission below:
WDM transceivers allow multiple data streams to travel simultaneously on one fiber, dramatically increasing capacity.
CWDM optical transceiver offers 18 channels with wider wavelength spacing (20nm) over a 1270nm to 1610nm range, covering distances up to 80km, commonly 10km to 40km.
Boasting outstanding cost performance and excellent compatibility, CWDM optical transceiver are among the most widely adopted solutions in optical access scenarios. Its mainstream product lineup consists of three series: 1.25G CWDM SFP, 10G CWDM SFP+, 25G CWDM SFP28 and 40G CWDM4 QSFP+.
1.25G CWDM SFP optical transceiver is a fundamental building block for WDM networks, and it matches well with mainstream CWDM multiplexers and demultiplexers. UnitekFiber’s 1.25G CWDM SFP optical transceivers support transmission distances ranging from 10 km to 80 km.
10G SFP+ CWDM optical transceiver operates within the 1270nm to 1610nm wavelength band with 18 available channels, supporting a maximum transmission distance of 40km. Packaged in SFP+ form factor, it is ideal for medium and short-distance applications such as 5G fronthaul and enterprise network access. Featuring low cost and broad compatibility, it works perfectly with mainstream WDM multiplexers and demultiplexers.
25G CWDM SFP28 optical transceiver is specifically tailored to meet the low-latency requirements of 5G fronthaul networks. Covering transmission distances ranging up to 30km, it supports industrial grade operation and is compatible with semi-active WDM architectures, making it the preferred choice for 5G fronthaul application.
Adopting a 4×10G wavelength combining design, 40G CWDM4 QSFP+ optical transceiver supports 40km transmission and comes in QSFP+ packaging. It effectively meets the bandwidth expansion requirements of metropolitan network aggregation layers while striking a sound balance between bandwidth capacity and cost control.
DWDM optical transceiver is distinguished by its core strengths of high capacity and long distance transmission. It is primarily designed for ultra high capacity transmission scenarios, such as backbone networks and Data Center Interconnects (DCI). DWDM optical transceiver provides 40/80/160+ channels by using narrower channel spacing (0.2nm-1.2nm), typically in the C-band (1525nm-1565nm) or L-band. DWDM supports much higher capacities and longer distances. Below are the popular type of DWDM optical transceiver for high-capacity transmission:
1.25G DWDM SFP optical transceiver is critical in WDM networks for maximizing bandwidth over existing fiber, supporting long distance transmission with low latency. By utilizing dense wavelengths, these modules allow 45channels to share a single fiber, providing cost effective connectivity. All of UnitekFiber’s 1.25G DWDM SFP optical transceiver will be undergo rigorous quality inspection to ensure they are ready for immediate use upon receipt.
10G DWDM SFP+ optical transceivers maximize existing fiber capacity by multiplexing multiple 10Gbps data streams onto a single fiber via ITU-T C-band wavelengths, and support long distance transmission. They are indispensable for high density, cost effective bandwidth expansion in metropolitan networks and data center interconnects. UnitekFiber’s 10G DWDM SFP+ optical transceivers cover transmission distances of 40km to 80km.
25G DWDM SFP28 optical transceiver is essential in WDM networks for increasing data capacity to 25Gbps per channel, enabling high density 5G fronthaul, and maximizing existing fiber, especially over long distances networks. 25G DWDM SFP28 optical transceiver offers significant bandwidth upgrades from 10G, low latency, and support tunable wavelengths to simplify management.
100G DWDM QSFP28 optical transceiver covers the C-band and utilizes a 100GHz wavelength spacing, offering a transmission distance of up to 80km. Powered by PAM4 modulation technology, it delivers high single wavelength capacity and currently serves as a flagship product for DCI and metropolitan area network backbones.
400G DWDM QSFP-DD optical transceiver is a pluggable optical transceiver based on high speed coherent technology, primarily designed for ultra long distance transmission in Data Center Interconnect (DCI) and Metropolitan Area Networks (MAN). Utilizing the QSFP-DD form factor, it achieves a single wavelength data rate of up to 400 Gbps and supports DWDM (Dense Wavelength Division Multiplexing) technology, typically enabling long distance transmission of 120 km or more over Single Mode Fiber.
The primary BiDi optical transceiver are the 1.25G/10G/25G BiDi optical transceiver. BiDi optical transceiver employ a wavelength-pairing design, such as 1270/1330nm or 1490/1550nm, to enable bidirectional transmission over a single fiber. BiDi optical transceiver are suitable for applications such as base station fronthaul and short distance interconnections within campus networks. Furthermore, BiDi optical transceiver offer the advantages of low power consumption and a compact form factor, making them ideal for outdoor, power constrained deployment environments. Highly compatible, they can seamlessly integrate with mainstream WDM equipment.
Links between AAU and DU often face challenges such as insufficient fiber resources, multi-channel synchronization and low latency transmission demands. Leveraging WDM technology for single-fiber multi-wavelength transmission, optical transceivers effectively resolve these issues, with CWDM and industrial-grade BiDi optical transceivers being the primary options.
Operating from 1270nm to 1610nm with 20nm wavelength spacing, CWDM optical transceiver support 6 to 12channels over one fiber. Ideal for short to medium fronthaul links, they feature high cost efficiency and dominate mainstream 5G fronthaul deployment.
Industrial grade BiDi optical transceiver adopt paired wavelengths (1270/1330nm) for single fiber bidirectional transmission, cutting fiber consumption by 50%. They are perfect for low power outdoor base station applications.
Data center interconnection and metropolitan networks require optical transceivers with high bandwidth, long transmission reach and flexible scalability. 40G CWDM4 QSFP+ and 100G/200G/400G DWDM optical transceivers are mainstream solutions.
40G CWDM4 QSFP+ optical transceivers integrate 4x10G wavelength multiplexing to deliver 40G transmission over up to 40km. Suited for enterprise campus and metro access networks, they offer superior cost advantages over DWDM optical transceivers for moderate bandwidth, cost sensitive projects.
100G, 200G and 400G DWDM optical transceivers with PAM4 modulation are designed for metro backbones and DCI scenarios, meeting massive high capacity data transmission requirements.
Optical transceivers serve as core hardware for optical access, WDM and high capacity transmission systems. A comprehensive understanding of diversified optical transceivers helps optimize network bandwidth, transmission distance, operational reliability and overall deployment cost.
UnitekFiber specializes in optical transceiver manufacturing, with a full optical transceiver covering 1.6T, 800G, 400G, 200G, 100G, 40G, 25G, 10G and 1.25G rates. We provide high quality optical transceiver to support for diverse WDM and high capacity transmission using. If you need any support of optical transceiver, please contact with our technical team at sales@unitekfiber.com to get more idea.
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