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Line narrowing and spectral hole burning in single-mode Nd(3+)-fiber lasers
Optics Letters
|September 10, 2009
Summary
Nd-doped fiber lasers show significant homogeneous linewidth contributions. Using a fiber Bragg reflector achieves stable 100-GHz bandwidth operation, influenced by power broadening and spectral hole burning.
Area of Science:
- Laser Physics
- Materials Science
Background:
- Neodymium (Nd)-doped silica fiber lasers are crucial for various applications.
- Understanding the spectral characteristics of these lasers is essential for optimizing their performance.
Purpose of the Study:
- To investigate the homogeneous contribution to the fluorescent linewidth in Nd-doped silica-fiber lasers.
- To achieve frequency-stable operation using fiber Bragg reflectors and analyze the dominant spectral effects.
Main Methods:
- Analysis of output spectrum line narrowing in Nd-doped silica-fiber lasers.
- Implementation of spectrally flat reflectors and fiber Bragg reflectors.
- Characterization of laser operation bandwidth and dominant spectral phenomena.
Main Results:
- Line narrowing indicates a substantial homogeneous contribution to the 1.09-microm fluorescent linewidth.
- Fiber Bragg reflector enabled frequency-stable operation with a 100-GHz bandwidth.
- Power broadening and spectral hole burning were identified as dominant effects.
Conclusions:
- Homogeneous broadening plays a significant role in the spectral linewidth of Nd-doped silica-fiber lasers.
- Fiber Bragg reflectors are effective for achieving stable, wide-bandwidth laser operation.
- Further research can leverage these findings for advanced laser design and applications.
