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Power Enhancement and Spot Homogenization Design for Arrayed Semiconductor Lasers.

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Summary

This study introduces a new rotationally polarized optical model that significantly enhances spot uniformity and optical coupling efficiency in arrayed semiconductor lasers, improving beam quality for fiber lasers.

Keywords:
coupling tolerancefiber couplingfiber pump lasersray tracing

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Area of Science:

  • Optics and Photonics
  • Laser Technology
  • Semiconductor Devices

Background:

  • Arrayed semiconductor lasers are crucial for fiber lasers, but their spot brightness and uniformity directly impact beam quality.
  • Existing optical models face challenges in optimizing both power and uniformity for these laser arrays.

Purpose of the Study:

  • To design and optimize a novel rotationally polarized optical model for arrayed semiconductor lasers.
  • To improve spot brightness, uniformity, and optical coupling efficiency compared to traditional models.

Main Methods:

  • Analysis of optical model performance for common fiber lasers using light tracing principles.
  • Design and optimization of a rotationally polarized optical model.
  • Evaluation of the model using multi-indicator metrics and coupling tolerance analysis.

Main Results:

  • The proposed model achieved a 24.03% improvement in spot uniformity and a 0.55% increase in power.
  • Maximum light distance was reduced from 120 mm to 82.58 mm.
  • Total coupling efficiency reached 89.04% with no degradation in coupling power and tolerance relationships.

Conclusions:

  • The novel rotationally polarized optical path model effectively enhances spot uniformity and optical coupling efficiency in arrayed semiconductor lasers.
  • This advancement contributes to improved beam quality for fiber laser applications.
  • The model demonstrates robust performance and tolerance, making it suitable for practical applications.