Gold-coated Optical Fiber - SM/MM/PM Gold-plated Optical Fiber - Metal Coated Sensing and Communication Fiber Optic

This product is a gold-coated optical fiber, with a coating layer made of gold that can withstand high temperatures of 700/650℃ and low temperatures down to -269℃. It is available in single-mode or multimode options, with multimode fiber core diameters of 50/62.5 microns, in step-index or graded-index configurations. The fiber core is made of silica.

Gold-coated optical fiber are suitable for use in various high and low temperature resistant fiber optic patch cords, optical fiber pigtails, fiber Bragg gratings/sensors, distributed optical fiber sensors, and sensing cables produced by Beijing Dacheng Yongsheng Technology Co., Ltd..

Note: The content of this material is for reference only. Due to differences in selected manufacturers and production batches, there may be slight deviations in specifications.

Product brand is OFSCN®.

OFSCN® Gold-coated Optical Fiber Structure:

Optical Fiber type: multi-mode Structural dimensions: Fiber core/cladding/coating: 50/125/155μm

Optical Fiber type: single-mode Structural dimensions: Fiber core/cladding/coating: 9/125/155μm

Physical picture 1

OFSCN® Gold-coated Optical Fiber Parameter Table:

Product type	Multimode gold-plated optical fiber	Single-mode gold-plated optical fiber
Product parameter	Specification	Specification
Geometric performance
Core diameter / Mode field diameter:	50 µm ± 2%	9.2 μm ± 0.4μm @ 1310nm 10.4 μm ± 0.5μm @ 1550nm
Core irregularity	≤ 6%	——
Cladding diameter	125 µm ± 2%	125 µm +1/-3µm
Core-cladding concentricity error:	≤ 0.5 µm	≤ 0.5 µm
Cladding irregularity	≤ 2%	≤ 0.07 µm
Coating diameter	155 µm ± 10%	155 µm ± 10%
Coating irregularity	≤ 6%	≤ 6%
Attenuation @ 850 nm	≤ 10 db/km	——
Attenuation @ 1310 nm	≤ 8 db/km	≤ 4 db/km
Attenuation @ 1550 nm	——	≤ 4 db/km
Fiber screening intensity/ Fiber proof strength	≥ 100Kpsi	≥ 100Kpsi
Fiber tensile strength	≥ 3.3GPa	≥ 3.3GPa
Operating temperature	-269 to +650°C	-269 to +700°C
Numerical aperture	0.20 ± 0.02	——
Bend radius (short-term)	200 times fiber radius	200 times fiber radius
Bend radius (long-term)	400 times fiber radius	400 times fiber radius

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Features of OFSCN® Gold-coated Optical Fiber

• Extreme Temperature Resistance: Operates reliably from -269℃ to 700/650℃.
• Gold Coating: Provides superior thermal stability and durability.
• Versatile Options: Available in single-mode (9/125/155 µm core/cladding/coating) and multi-mode (50/125/155 µm core/cladding/coating) configurations.
• Silica Core: Ensures excellent optical performance.
• Robust Construction: Designed for demanding and harsh environments.

Potential Application Scenarios & Industries

This gold-coated optical fiber is ideally suited for applications where conventional fibers would fail due to extreme thermal conditions.

Application Examples of OFSCN® Gold-coated Optical Fiber:

• High-Temperature Sensing: Monitoring processes in furnaces, boilers, turbines, and chemical reactors.
• Cryogenic Sensing/Monitoring: Applications in liquefaction plants, aerospace, and superconducting research where extremely low temperatures are present.
• Distributed Sensing: For long-distance temperature and strain monitoring in pipelines, bridges, and geological structures.
• Medical/Biomedical Devices: Where sterilization at high temperatures or operation in extreme conditions is required.
• Aerospace & Defense: For sensors and communication links in aircraft engines, spacecraft, and military equipment exposed to rapid and extreme temperature changes.
• Industrial Process Control: Monitoring and control in foundries, glass manufacturing, and metal processing.
• Oil & Gas Exploration: Downhole sensing for temperature and pressure in challenging drilling environments.
• Power Generation: Monitoring in nuclear power plants, thermal power plants, and renewable energy systems.

Industry Examples of OFSCN® Gold-coated Optical Fiber:

• Aerospace & Defense
• Oil & Gas
• Industrial Automation & Process Control
• Energy (Nuclear, Thermal, Geothermal, Renewable)
• Research & Development (Cryogenics, High-Temperature Physics)
• Medical & Pharmaceutical
• Automotive (Engine Compartment Sensing)
• Civil Engineering (Structural Health Monitoring)
• Mining

Figure 1：

Physical picture 2

Figure 2：

Gold-plated optical fiber with part of the coating layer removed