Radiation-Resistant Er³⁺-Doped Superfluorescent Fiber Sources

Area of Science:

• Optoelectronics
• Materials Science

Background:

• Erbium-doped fiber sources (SFSs) are crucial for optical communications.
• Their performance can degrade under radiation, limiting applications in harsh environments.

Purpose of the Study:

• To investigate and improve the radiation resistance of Er3+-doped SFSs.
• To minimize wavelength drift and output power loss under irradiation.

Main Methods:

• Experimental study of radiation effects on three SFSs with varying Er-doped fiber lengths.
• Implementation of spectral trimming using a customized filter.
• Adoption of pump power feedback control to mitigate output power loss.

Main Results:

• Signal light attenuation was lower in the 1530 nm band compared to the 1560 nm band.
• The developed SFS exhibited mean wavelength drift <40 ppm and output power loss <0.2 dB at doses >1000 Gy.
• The spectral trimming and pump feedback control methods proved effective.

Conclusions:

• The combined spectral trimming and pump feedback control significantly enhances the radiation-resistant capabilities of Er3+-doped SFSs.
• This method is vital for ensuring the reliability of fiber sources in irradiation environments.