The cornerstone of global communications: OFSCN® G.652.D fiber – the reliable choice for long-distance, high-capacity networks

OFSCN® G.652.D single-mode optical fiber , a product of Beijing Dacheng Yongsheng Technology Co., Ltd. (DCYS) , is the most widely used and mature optical fiber standard in the world and the cornerstone for building future high-capacity backbone and metropolitan area networks.

Facing the challenges of network upgrades, compatibility, and long-distance transmission, G.652.D provides the most reliable protection for your investment with its unparalleled stability and full-spectrum characteristics.

Core Feature 1 : Full-spectrum Transmission Capability—Future-oriented Bandwidth Guarantee

The biggest advantage of the G.652.D standard lies in its low water peak characteristic, which perfectly solves the signal absorption problem of traditional optical fibers near 138 ± 3nm .

Optical performance advantages	Specifications (1550nm)	Value Interpretation
Minimum attenuation	≤0.20 dB/km	Ensure ultra-long distance transmission signal strength and reduce the need for relay stations.
Zero dispersion point	1300nm − 1324nm	Optimal performance in the 1310nm window, fully compatible with existing equipment.
Low PMD	≤0.1 ps /sqrt(km)	Meet the stringent requirements of high-speed systems such as 400G/800G.

Focus on customer questions (Q&A):

• Q1: Can the capacity of G.652.D support 400G/800G upgrade?
  • A: Absolutely. The low water peak characteristic makes the full 1260nm - 1625nm band available (including E-Band), capable of supporting multi-channel wavelength division multiplexing technologies such as CWDM/DWDM, providing sufficient capacity foundation and low PMD performance guarantee for your network upgrade to 400G and even higher speeds.
• Q2: What improvements does G.652.D have compared to G.652.C?
  • A: G.652.D is the latest standard. Its main improvement is that it completely eliminates the water peak loss at 1383nm, ensuring that E-Band is truly used for commercial transmission. It has stronger full-band transmission value than G.652.C.

Core Feature 2: Extremely High Compatibility — The “Universal Language” of the Internet

As an international standard, G.652.D has the most complete ecosystem and supply chain, ensuring the security of your investment.

Focus on customer questions (Q&A):

• Q3: We have old G.652 optical fibers in our network. Can G.652.D be seamlessly spliced?
  • A: Absolutely. G.652.D is fully backward compatible with all earlier versions of G.652 (A/B/C). Its perfectly matched mode field diameter (MFD) ensures extremely low splicing losses, making it the safest and most economical choice for upgrading and expanding existing networks.
• Q4: Why not choose the bend-resistant G.657 optical fiber?
  • A: G.652.D is designed specifically for long-distance, high-capacity backbone networks . It has a lower attenuation coefficient at 1550nm and is more suitable for outdoor and long-distance applications with standardized cabling. For indoor cabling or FTTH access , we recommend G.657.A. However, for backbone networks, G.652.D still offers the best balance between performance and cost.

OFSCN® Quality Assurance and Application

OFSCN® G.652.D optical fiber strictly controls geometric parameters, such as core/cladding concentricity error ≤0.6 μm , ensuring high splicing efficiency and long-term reliability.

• Main application scenarios:
  • National and regional backbone networks
  • Metropolitan area network and access network backbone optical cables
  • Submarine optical cables (some low-attenuation versions)
  • High-precision optical communication equipment manufacturing
• Product flexibility: We not only provide G.652.D optical cables and patch cords, but also bare optical fibers to meet customers' needs for customized special optical fiber devices or FBG sensors.

Key transmission parameters at a glance

Transmission parameters	Specification	Geometric parameters	Specification
1310nm attenuation	≤0.35 dB/km	Mode field diameter (1310nm)	8.6 microns to 9.5 microns
1550nm attenuation	≤0.20 dB/km	Cladding diameter	125 ±0.7 μm
PMD	≤0.1 ps /sqrt(km)	Core/cladding concentricity error	Less than or equal to 0.6 microns

Choosing G.652.D means choosing the highest globally recognized standard and the most stable network foundation.

For more product information, please visit our official website:

https://www.ofscn.org/optical-fibers/g-652-d.html

Or contact the sales team of Beijing Dacheng Yongsheng Technology Co., Ltd. to obtain the most competitive long-distance solutions.