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Published on: March 19, 2016
Modal analysis of linear Talbot-cavity semiconductor lasers.
Optics Letters
|September 25, 2009
Summary
Larger semiconductor laser arrays can maintain mode discrimination by reducing the near-field fill factor, offsetting losses from imperfect Talbot imaging. This research optimizes laser array design for improved performance.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
- Array Optics
Background:
- Linear Talbot-cavity semiconductor lasers are crucial for high-power applications.
- Maintaining mode discrimination in larger arrays is challenging due to fabrication imperfections.
- Talbot imaging effects, including edge diffraction, impact laser performance.
Purpose of the Study:
- To perform a modal analysis of linear Talbot-cavity semiconductor lasers with a finite number of array elements.
- To investigate the impact of imperfect Talbot imaging and edge diffraction on array supermodes.
- To identify strategies for maintaining mode discrimination in larger semiconductor laser arrays.
Main Methods:
- Self-consistent calculation of array supermode profiles.
- Quantification of losses due to imperfect Talbot imaging.
- Inclusion of edge diffraction losses in the modal analysis.
Main Results:
- Developed a modal analysis framework for finite linear Talbot-cavity semiconductor laser arrays.
- Quantified the relationship between array size, Talbot imaging quality, and mode discrimination.
- Demonstrated that reducing the near-field fill factor can offset decreased mode discrimination in larger arrays.
Conclusions:
- The study provides a method for analyzing modal properties in semiconductor laser arrays.
- Findings offer a design guideline to enhance mode discrimination in larger Talbot-cavity lasers.
- Reducing near-field fill factor is a viable strategy to improve the performance of large-scale laser arrays.
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