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Photobleaching effects in optical fiber waveguides.
Applied Optics
|March 25, 2010
Summary
Optical signal intensity influences radiation-induced attenuation recovery in optical fibers. Photobleaching, a recovery mechanism, is more effective in pure silica core fibers after radiation exposure.
Area of Science:
- Materials Science
- Optical Engineering
- Radiation Physics
Background:
- Optical fiber waveguides are susceptible to radiation-induced attenuation.
- Understanding recovery mechanisms is crucial for reliable fiber optic systems in radiation environments.
Purpose of the Study:
- To investigate the impact of optical signal intensity on the recovery of radiation-induced attenuation in optical fibers.
- To determine the influence of fiber composition (pure vs. doped silica) on this recovery process.
Main Methods:
- Exposure of optical fiber waveguides to a 3700-rad dose of ionizing radiation.
- Monitoring the recovery of attenuation at an operational wavelength of 0.85 microm.
- Varying the optical signal intensity during the recovery phase.
Main Results:
- Photobleaching, a recovery phenomenon, was observed in both pure and doped silica core fibers.
- The photobleaching effect, leading to reduced attenuation, was more pronounced in pure silica core fibers compared to doped ones.
- Higher optical signal intensity likely enhances the photobleaching-induced recovery.
Conclusions:
- Optical signal intensity plays a significant role in mitigating radiation damage in optical fibers.
- Pure silica core fibers exhibit a greater capacity for recovery from radiation-induced attenuation via photobleaching.
- These findings are important for designing radiation-hardened optical systems.
