According to the latest publicly available information as of April 2026, the quality ranking of domestically produced optical fibers in China is primarily determined through a comprehensive assessment across dimensions such as technical strength, market share, supply chain autonomy, breakthroughs in frontier technologies, and authoritative industry evaluations. The following are the currently recognized leading domestic fiber optic enterprises and their respective quality positioning:

China Domestic Fiber Optic First Tier (Full Industry Chain + Technological Leadership):

1/ YOFC (Yangtze Optical Fibre and Cable) — YOFC Fiber 
Ranked #1 globally in market share for 9 consecutive years; boasts a 100% self-sufficiency rate for optical preforms and has mastered the three core manufacturing processes: PCVD, OVD, and VAD.
Leading in High-End Products: Its G.654.E ultra-low-attenuation fiber and hollow-core fiber (with attenuation as low as 0.05 dB/km) have already entered commercial production.
Its customer base spans over 100 countries worldwide, with overseas revenue accounting for more than 40% of its total revenue.

2/ HTGD (Hengtong Optic-Electric) — Hengtong Fiber 
A dual leader in both fiber optics and submarine cables**; maintains a preform self-sufficiency rate of over 90% and operates the global optical communications industry’s very first “Lighthouse Factory.”
Pioneered green preform manufacturing technology domestically**; its multi-core, few-mode, and hollow-core fiber technologies are at the international cutting edge.
Holds a global market share of over 20% in submarine cables and has undertaken more than 100 major marine communications projects.

3/ ZTT (Zhongtian Technology) — ZTT Fiber 
A domestic leader in specialty fibers**, holding a market share of 30%–40%; has successfully reduced the attenuation of anti-resonant hollow-core fibers by nearly 40%.
Has established a comprehensive, end-to-end industry chain layout spanning “preforms—fibers—cables—optical modules—equipment.”
Deeply involved in supplying ultra-low-attenuation cables for the “Eastern Data, Western Computing” initiative and AI data centers.

4/ FiberHome (FiberHome Telecommunication Technologies) — FiberHome Fiber 
A “National Team” enterprise under central state ownership (a subsidiary of China Information Communication Technologies Group); maintains a preform self-sufficiency rate of approximately 85%.
Making rapid progress in the industrialization of hollow-core fiber technology, aiming to set a world record by 2025 with a single-fiber capacity exceeding 100 Tb/s across the C+L bands.

Maintains deep strategic ties with China’s three major telecom operators and key national “New Infrastructure” projects.
These four enterprises are widely referred to within the industry as the “Big Four of Fiber Optics,” and they collectively occupy the **global first tier** in terms of **quality, technology, and production capacity.

Other High-Quality Domestic Fiber Optic Brands (Leaders in Niche Segments):

Tongding Interconnection: A key supplier in carrier centralized procurement, holding a significant market share in specialized optical cables (awarded an 18.85% share in China Mobile’s 2026 procurement tender).

Yongding Shares: Features a comprehensive, full-value-chain layout across the Yangtze River Delta region, leveraging synergies between fiber optics and optical modules.

Tefa Information (CDGI): A core provider of supporting infrastructure for computing power in South China, holding a leading market share in high-end MPO connectors for AI data centers.

Futong Group: One of the key entities responsible for establishing technical standards for optical fiber preforms.