Overcoming thermal barriers, precise transmission: OFSCN® 120°C Single-mode high-temperature resistant optical fiber—a powerful tool for long-distance sensing and communication

Introduction: Breaking the Temperature Bottleneck in Industrial Long-Distance, High-Precision Applications

In industrial applications requiring extremely high precision and ultra-long-distance transmission (such as distributed temperature sensing (DTS) and fiber Bragg grating ( FBG) sensing), the coating of standard single-mode optical fiber cannot withstand continuous high-temperature environments, resulting in performance degradation and system failure.

OFSCN®, a subsidiary of Beijing Dacheng Yongsheng Technology (DCYS) , has designed a 120°C single-mode, high-temperature-resistant optical fiber specifically to address this challenge . This fiber seamlessly combines the low-loss and high-bandwidth characteristics of single-mode fiber with superior thermal protection , making it an ideal core component for next-generation industrial sensor networks.

Product official website link : https://www.ofscn.org/optical-fibers/high-temperature-120-sm.html

1. Core Features and Technical Advantages

Feature Classification	Key indicators and advantages	The value of unimodal characteristics
Stable temperature range	Operating temperature: -50°C to +120°C continuous operation.	Ensure that signal attenuation and fluctuation are minimal during long-distance transmission in a wide temperature range environment .
Single mode low loss	Attenuation @1550 nm< 0.4db/km .	It ensures stable signal transmission over tens of kilometers and is a cost-effective choice for long-distance DTS and optical communications .
Modified coating protection	Modified acrylate coating is used , and the coating diameter is 255 μm or 245 μm .	Provides excellent thermal stability and mechanical protection, extending the service life of optical fibers at high temperatures.
Industrial-grade mechanical strength	Tensile strength up to 100 kpsi .	Able to withstand the harsh mechanical stress of oil and gas downhole wiring, pipeline laying and industrial vibration.

2. Customer Selection Questions and Answers (Customization Guide)

We provide professional answers and selection suggestions for the four aspects that customers are most concerned about when choosing high-precision, special single-mode optical fibers:

Question 1: What is the function of carbon coating? When should I choose it?

• Non-carbon coating : Suitable for most high temperature environments where dry and free from hydrogen threat.
• Optional carbon coating: The carbon coating acts as a sealant, providing critical resistance to hydrogen corrosion (hydrogen loss) and humid environments . If your application involves downhole oil and gas wells, high pressure, humid conditions , or long-term burial deployment , a carbon coating is essential to ensure long-term low loss at 1310 nm and 1550 nm wavelengths .

Question 2: What is the difference between doped quartz fiber core and pure quartz fiber core?

• Doped Silica Core: This is the type of standard G.652D optical fiber with excellent communication performance.
• Pure quartz core fibers are generally superior in radiation resistance or have specific advantages in certain sensing wavelength ranges. For radiation-sensitive applications such as nuclear power and aerospace , pure quartz core fibers are recommended.

Question 3: Can this optical fiber be used to make FBG sensors?

• Yes. This 120°C single-mode fiber is an ideal substrate for high-temperature FBG sensors. Its standard 9/125μm structure and stable core design ensure wavelength stability and demodulation accuracy at high temperatures .

Question 4: What are the compatibility and delivery forms of optical fiber?

• Compatibility: The fiber size (9/125μm cladding) and optical properties are fully compatible with mainstream communication equipment , DTS/FBG demodulators , and fiber fusion splicers.
• Delivery form: We provide bare optical fiber for secondary processing. We also accept customized high-temperature optical fiber jumpers/ pigtails , as well as stainless steel metal sheathed cables (FIMT) for harsh environments and other finished products.

3. Typical Application Areas - Long-Distance and High-Precision Sensing

1. Energy (Electricity/Nuclear/Geothermal): Temperature and strain monitoring of long-distance transmission lines, transformers, and nuclear reactors.
2. Oil and gas exploration and production: Distributed monitoring of downhole temperature, pressure, and flow in oil and gas wells to ensure data transmission is resistant to hydrogen damage .
3. Structural Health Monitoring (SHM): Long-term distributed monitoring of strain and temperature in large infrastructure such as bridges, tunnels, and dams.
4. Industrial equipment monitoring: Precision FBG sensing for equipment such as aircraft engine test benches, high-temperature furnaces, and industrial boilers.

Upgrade your system now

Choosing OFSCN® 120°C single-mode high-temperature optical fiber means you have chosen a reliable transmission medium with ultra-low loss and high-precision sensing capabilities under high thermal challenges .

Beijing Dacheng Yongsheng Technology (DCYS) looks forward to becoming your reliable partner for specialty fiber optic solutions.

Contact us now for technical specifications, samples, or a custom quote:

• Beijing Dacheng Yongsheng Technology (DCYS)
• Product website: https://www.ofscn.org/optical-fibers/high-temperature-120-sm.html