Product Introduction

Sapphire, i.e. single crystal aluminum oxide (Al203), is a material with high mechanical strength, chemical corrosion resistance, and good thermal conductivity, with a melting point of up to 2072°C. ZMSH can provide sapphire optical fibers with diameters of 75~500um, and tapered optical fibers are optional. Tapered optical fibers can ensure higher light transmission energy without sacrificing the flexibility of the optical fiber: for optical fibers with a diameter greater than 100um, PTFE sleeves or optical fiber connectors are optional, and other types of optical fibers are optional, such as AI203-doped, YAG-doped, and YAG-doped optical fibers.

Working Principle of Sapphire Optical Fiber

Sapphire optical fibers leverage their unique material properties and optical mechanisms to enable efficient light signal transmission in extreme environments. The core principles are outlined below:

Material & Fabrication

High-purity sapphire: Melts at 2072°C, resists corrosion/radiation, and withstands extreme temperatures (-269°C to 1900°C).

LHPG manufacturing: Laser-formed fibers (75–500 μm) with air-cladding for minimal optical loss.

Optical Mechanism

TIR: High refractive index (~1.76) core traps light efficiently (NA up to 1.4).

Low attenuation: 0.5–1.0 dB/m in near-IR for high-power laser transmission.

Key Advantages

Mechanical strength: 2200 MPa tensile strength, outperforms silica.

Environmental resilience: Stable in vacuum, radiation (100 kGy γ-ray), and chemical exposure.

Performance Specifications

Applications

1. Ultra-High-Temp Industrial Sensing

• Molten metal level monitoring in smelters

• Real-time combustion diagnostics in jet engines

2. Deep-Space Optical Systems

• Corrosion-resistant data links for Venus landers

• Radiation-hardened signal transmission in nuclear-powered spacecraft

3. Advanced Medical Solutions

• High-power laser ablation surgical probes

• Multispectral imaging bundles for micro-endoscopes

4. Extreme Scientific Research

• Plasma diagnostics in fusion reactors

• In-situ spectral analysis under ultra-high pressure (DAC applications)

Q&A

Q1: Key advantages over silica fibers?
A: Operates continuously at 1600°C for 500+ hours (vs. silica's 400°C/1hr limit) with 10× higher radiation resistance, making it ideal for nuclear/space applications.

Q2: How is sapphire brittleness addressed?
A: Proprietary Gradient Interface Technology features:

• Titanium alloy stress-relief layer (prevents microbending losses)

• Nanoscale surface polishing (defect density <0.1/cm²)