OFSCN® 120°C SM High-Temperature Single-Mode Fiber: Leading the New Standard for Medium- and High-Temperature Sensing and Communications

 

Company Name	Beijing Dacheng Yongsheng Technology Co., Ltd. Yongsheng Technology Co., Ltd. - DCYS)
Product Brand	OFSCN®
Product Model	120℃ SM high temperature optical fiber
Product details page	https://www.ofscn.org/optical-fibers/high-temperature-120-sm.html

1. Product Positioning and Technical Background

In fields such as petroleum and petrochemicals, energy and electricity, industrial manufacturing, and special sensing, the coating performance of traditional optical fibers will rapidly degrade in environments above 85°C, seriously affecting the long-term reliability and service life of the optical fiber.

OFSCN® 120°C SM high-temperature single-mode optical fiber was developed to address this pain point. Utilizing advanced modified acrylic coating technology, it elevates the fiber's stable operating temperature to 120°C , providing a solid foundation for data communications and high-precision distributed sensing (DTS) in harsh medium- and high-temperature environments.

2. Core Technical Parameters and Reliability Commitment

As a professional communication and sensing optical fiber, we have achieved industry-leading levels in terms of geometric performance, mechanical performance, and optical performance:

1. Heat resistance and mechanical properties (reliability indicators that customers care about)

Parameter Category	Specifications	Why it Matters
Maximum operating temperature	+120℃	Far superior to standard communication optical fibers, ensuring long-term stability in high-temperature heat sources or equipment room environments.
tensile strength	100 kpsi	Ensure the mechanical integrity of optical cables during manufacturing, laying and operation, especially when stretched underground or in narrow pipes.
Coating materials	Modified acrylate	It improves the heat resistance of traditional acrylics while maintaining good peelability, making it easier to weld.
Operating temperature range	-50℃ to +120℃	Suitable for outdoor or industrial environments with large temperature changes.

2. Optical performance (a transmission quality indicator that customers care about)

Parameter Category	Specifications	Value Proposition
Fiber type	Single Mode (SM)	It supports high-speed and long-distance transmission and is suitable for communication backbone networks and precision sensor signal transmission.
Mode field diameter @1310 nm	8.6±0.4μm	It has good compatibility with standard G.652D optical fiber, facilitating system integration and on-site splicing.
Attenuation @ 1550 nm	< 0.4 dB/km	Ultra-low loss ensures that signals can be transmitted over longer distances or achieve higher signal-to-noise ratio in sensing applications.
Geometric dimensions	Core/cladding/coating: 9/125/245-255μm	Standardized size, compatible with existing fiber processing equipment.

3. Flexible customized solutions (to meet specific application requirements)

To meet the challenges of different industrial environments, we provide flexible structural options, allowing customers to choose the most suitable configuration according to their actual needs:

Customization options	Core material	Coating structure	Core Advantages
Option A (Standard)	Doped silicon core	Non-carbon coating	High cost performance, suitable for general medium and high temperature communications and sensing.
Option B (High Reliability)	Doped silicon core	Carbon coating (carbon seal)	Enhanced resistance to hydrogen damage and moisture. The carbon sealing layer effectively blocks water vapor and hydrogen, significantly extending the life of the optical fiber in humid or hydrogen-containing environments.
Option C (High Purity)	Pure silicon core	Optional	Suitable for precision optical applications requiring extremely low nonlinear effects or specific wavelength requirements.

4. Application field: reliable protection in high temperature environment

This product has been widely used in:

1. Distributed Sensing Systems (DTS & DSS): Serves as core sensing elements to monitor temperature or strain distribution in long-distance pipelines, tanks, and structures.
2. Petroleum and petrochemical industry: used for downhole cables and refinery facilities for real-time data acquisition and process control.
3. Electric power and energy: used to monitor temperature changes inside high-voltage substations, generators, and nuclear power plants.
4. Fiber Bragg Grating (FBG) Manufacturing: It is an ideal base fiber for making high-reliability, high-temperature resistant FBG sensors .

Beijing Dacheng Yongsheng Technology Co., Ltd. (DCYS) is dedicated to providing high-quality solutions for specialty optical fiber products. Choosing OFSCN® 120°C SM high-temperature optical fiber means choosing guaranteed 120°C performance and professional customization services.

Contact us today to start reliable connections in high-temperature environments for your project !

The contents of this document are for product promotion only. All parameters and specifications are subject to the final supply contract and product data sheet.