Underground Single Mode Optical Fiber Market to Reach USD 12,909 Million by 2031 Top 10 Company Globally

Underground singlemode optical fiber refers to fiber optic cables designed for buried deployment used to connect telecom backbone networks, metro rings, data centers, smart cities, and industrial campuses. Singlemode fiber enables longreach, highbandwidth, and lowattenuation optical transmission. Underground deployment protects fibers from environmental exposure and vandalism, making it vital for urban densification, 5G backhaul, and reliable enterprise connectivity.

In 2024, the global singlemode optical fiber market is estimated at around USD 8,200 million for underground deployment, with an annual unit volume of approximately 1.1-1.2 million km of fiber cable, yielding an average selling price (ASP) of roughly USD 2,300 per km. Forecasts indicate that the underground segment is expected to grow at a CAGR of over 6.2% between 2024 and 2031, reaching nearly USD 12,909 million by 2031 representing the largest single-mode deployment segment globally, with Asia-Pacific commanding a dominant share.
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Latest Trends and Technological Developments
On late 2024, reports highlighted an accelerated drive in underground deployments tied to national broadband programs such as Indias BharatNet and Chinas ultra-broadband initiatives favoring underground singlemode installations to avoid pole congestion and enhance reliability. In early 2025, multi-core single-mode cables, optimized for underground micro-trenching and urban densification, began commercial rollouts in Asia-Pacific, targeting data center interconnect and metro fiber rings.
Asia-Pacific leads global consumption of underground singlemode fiber, holding about 60% of global deployment share in 2024, driven by telco expansion and digital infrastructure upgrades in China, India, Japan, and South Korea. In China alone, integration of 5G networks, FTTH rollout, and smart-city fiber rings accounts for a major share of unit sales. The Asia-Pacific singlemode fiber market is forecast to grow at ~10.1% CAGR from 2025 through 2033, reaching USD 2.72 billion by that year.

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Underground Single Mode Optical Fiber by Type:
OS1 Fibers

OS2 Fibers

Others

Underground Single Mode Optical Fiber by Application:
Telecommunication

Mine Communication

Data Centers

Industrial Networking

Others

Global Top 10 Key Companies in the Underground Single Mode Optical Fiber Market
Corning Incorporated

Prysmian Group

Sumitomo Electric Industries

CommScope Holding Company inc.

Nexans SA

Optical Fiber Solutions

Finolex Cables Ltd.

Bjagyadeep Cables Private Limited

Fujikura Ltd.

Sterlite Technologies Limited

Regional Insights
In Southeast Asia (Indonesia, Malaysia, Thailand, Vietnam, Philippines), underground single-mode fiber is rapidly expanding within smart city projects, metro broadband access, and enterprise campus installations. Though the region comprises under 10% of global market volume in 2024, growth is strong estimated at 1214% CAGR into 2031. Countries such as Singapore, Malaysia, and Thailand are investing in underground FTTP networks to reduce visual clutter and ensure network resilience. However, ASPs remain higher due to trenching cost and limited manufacturing base in the region.
Underground Single Mode Optical Fiber by Region:
North America
Europe
China
Japan
India
South East Asia

High trenching and civil work costs in dense urban centers pose deployment challenges and budget uncertainty. Regulatory and permitting hurdles vary by country especially in Indonesia and Vietnam adding delay risk. Multi-core and ribbon underground cables may require advanced jointing and splicing expertise, which is limited locally. Competition from aerial fiber in low-cost or rural contexts pressures underground adoption. In Southeast Asia, natural hazards and rapid urbanization complicate underground duct infrastructure planning.
Fiber optic manufacturers should partner with telecom operators, municipalities, and smart city integrators to plan duct networks alongside underground cable. Investments in flat micro-trench cable formats and multi-core configurations can lower perunit ASP in Southeast Asia. Regional cable fabrication or zone warehousing can reduce logistics costs and support justintime deployment. Training splicing and deployment crews through local technical academies will enhance rollout quality. Establishing cross-border fiber co-ops and shared duct infrastructure can derisk capital expenditure.

Product Models
Underground single mode optical fiber cables are essential components of long-distance and high-speed data transmission networks, especially in telecommunications, data centers, and metropolitan broadband systems. These fibers are engineered for low signal loss and high bandwidth, and are buried underground for stable and secure connectivity.
OS1 fibers optimized for indoor and tight-buffered applications with shorter distance. OS1 typically supports transmission distances of up to 2 km with higher attenuation Notable products include:
Corning SMF-28 Ultra OS1: High-performance single mode fiber with tight-buffer design, ideal for campus and building backbone installations.
OFS EZ-Bend OS1 Fiber Cable: Tight-buffered cable with excellent bend performance for constrained underground conduits and MDU environments.
Fujikura OS1 Fiber Optic Cable: Features high tensile strength and flame resistance for duct and tray installations in metro networks.
YOFC OS1 Tight Buffered Cable: Designed for high-density underground paths in commercial building networks with low dispersion.
Sterlite Technologies OS1 Fiber Cable: Designed for indoor backbone use with a reinforced outer sheath for underground protection.
OS2 fibers designed for outdoor, loose-tube configurations with extended range and lower attenuation, making them ideal for long-haul underground installations. Supports distances of over 10 km with lower attenuation. Examples include:
Corning SMF-28e+ OS2 Outdoor Cable: Industry-standard low-loss fiber ideal for long-haul and metro underground applications.
Furukawa OS2 Dry Loose Tube Cable: Designed for high-speed, long-distance underground links in backbone and access networks.
Prysmian OS2 Sirocco HD Cable: Ultra-compact, loose tube OS2 cable with high fiber count for dense underground infrastructure.
YOFC OS2 Loose Tube Cable: Water-blocked, UV-resistant fiber cable for underground installations in harsh environments.
OFS AllWave+ OS2 Optical Cable: Designed for zero water peak performance with rugged jacket for buried and duct routes.
The underground single-mode optical fiber market is a robust subsegment of the global fiber optics industry, valued at roughly USD 8,200 million in 2024, with unit deployments around 1.1 million km and ASP near USD 2,300/km. With projected CAGR of 6.2% into the early 2030s, underground fiber is becoming the deployment standard in dense urban and smart infrastructure. Asia-Pacific leads dramatically; Southeast Asia is emerging as a high-growth region with key projects under way. Civil cost, regulatory complexity, and local capability remain challenges, but opportunities lie in regional cable manufacturing, multi-core formats, and integrated deployment services.

Investor Analysis
Underground single-mode optical fiber is a high-growth infrastructure segment USD 8,200 million in 2024 growing at 6,2% CAGR, driven by telecom operators, smart cities, and data center expansion in Asia-Pacific.
Investors can back regional cable fabrication, trenching and micro-trench service providers, multi-core fiber innovations, and cross-border duct-sharing initiatives. Equity or partnerships with leading suppliers (Corning, Prysmian, Sterlite, YOFC) expanding in AsiaPacific or launching Southeast Asian facilities provide exposure.
Fiber is the backbone of digital transformation. Underground deployment adds resilience, reduces operational disruption, and futureproofs networks. With Asia-Pacific leading in broadband investments and Southeast Asia scaling urban fiber projects, strategic investment in underground fiber supply chain and deployment infrastructure offers strong returns tied to longterm connectivity megatrends.
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5 Reasons to Buy This Report
Breakdown of underground single-mode within broader USD 9-14 billion fiber optics space.
Unit volume and ASP metrics supporting financial modeling and project planning.
Regional intelligence across Asia and Southeast Asia with forecast to 2033.
Insight into technological shifts e.g. multi-core, microtrench fiber, smart city alignments.
Strategic operator and manufacturer profiles with deployment partnerships and regional positioning.
5 Key Questions Answered
What was the market size and ASP for underground single-mode fiber in 2024?
What is the annual growth rate and projected revenue through 2031 or 2034?
How do Asia-Pacific and Southeast Asia compare in maturity, demand drivers, and infrastructure readiness?
What are the latest technological trends shaping underground fiber deployment?
Which companies are leading global and regional supply, and what strategic moves are they making?
Chapter Outline
Chapter 1: Introduces the report scope of the report, executive summary of different market segments (by region, product type, application, etc), including the market size of each market segment, future development potential, and so on. It offers a high-level view of the current state of the market and its likely evolution in the short to mid-term, and long term.
Chapter 2: key insights, key emerging trends, etc.
Chapter 3: Manufacturers competitive analysis, detailed analysis of the product manufacturers competitive landscape, price, sales and revenue market share, latest development plan, merger, and acquisition information, etc.
Chapter 4: Provides profiles of key players, introducing the basic situation of the main companies in the market in detail, including product sales, revenue, price, gross margin, product introduction, recent development, etc.
Chapter 5 & 6: Sales, revenue of the product in regional level and country level. It provides a quantitative analysis of the market size and development potential of each region and its main countries and introduces the market development, future development prospects, market space, and market size of each country in the world.
Chapter 7: Provides the analysis of various market segments by Type, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different market segments.
Chapter 8: Provides the analysis of various market segments by Application, covering the market size and development potential of each market segment, to help readers find the blue ocean market in different downstream markets.
Chapter 9: Analysis of industrial chain, including the upstream and downstream of the industry.
Chapter 10: The main points and conclusions of the report.

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