Changjin Photonics' Anti-Irradiation Fiber Series Breaks Technological Barriers to Push New Limits in Radiation Protection.

With the expansion of the global low-altitude economy, the rapid R&D and market growth of anti-irradiation fibers have been directly driven. Anti-irradiation fibers are commonly used in scenarios such as UAV navigation, communication, and sensing systems, requiring tolerance to complex electromagnetic environments and radiation interference. Through long-term application verification, all series of Changjin Photonics' anti-irradiation fibers (withstanding 300Gy-1000Gy, suitable for high-risk scenarios like space and nuclear power plants), including ytterbium-doped, erbium-doped, and erbium-ytterbium co-doped fibers, exhibit excellent anti-irradiation performance. They can effectively reduce the impact of high-energy ion radiation on fibers, while featuring good consistency, high conversion efficiency, and low fiber fusion splicing loss to meet the performance requirements of different fiber amplifiers.

       ★New Product List

       ★Technical Barriers and Market Competitiveness

Scarcity:

        Only a few global enterprises (such as Ixblue, Corning, Nufern) possess similar technologies, and domestically autonomous products have filled this gap.

Price Advantage:

Scale production has reduced the price compared to imported counterparts, facilitating applications in scenarios like low-altitude economy and nuclear energy monitoring.

Service Advantage:

Supports customized doping solutions (e.g., gain optimization for specific wavelengths, etc.).

       ★ Radiation Resistant PM Er-Doped Fiber

Figure 1. Structural diagram of the single-wavelength 1540nm gain and noise test system for anti-irradiation optical fiber

1. Excellent Anti-Irradiation Performance

After exposure to 1000Gy (100krad) radiation, the fiber gain only decreases by 0.645 dB (from 30.600 dB to 29.955 dB), indicating extremely low impact of radiation on gain. The RIGV value (Radiation Induced Gain Variation coefficient) is only 0.00645 dB/krad, far below the industry nominal threshold (≤0.03 dB/krad), demonstrating outstanding anti-radiation performance that meets the special application scenarios requiring high anti-irradiation performance.

2. High Gain and Conversion Efficiency

       The fiber features excellent energy conversion efficiency, with a gain of 30.6 dB before irradiation under 200 mW pump power. Moreover, short fiber length (1.15 m) can achieve high gain, suitable for compact laser or amplifier designs. It reduces nonlinear effect accumulation, lowers material costs, and ensures high reliability and excellent economy.

Figure 2. Absorption test diagrams of Changjin Photonics' anti-irradiation fiber before and after irradiation with a total dose of 1000Gy (1000Gy = 100krad)

★ Application Fields

  Single/Multi-Channel Fiber Amplifiers   

  ASE Light Sources   

  Fiber Lasers   

  Low-Earth Orbit (LEO) Satellite Communications