用于任意波段的反射式全介质偏振合束光栅
By designing a trapezoidal groove profile grating etching layer and a multilayer dielectric film structure, a reflective all-dielectric polarization beam combiner grating is developed, which solves the problems of limited wavelength and low diffraction efficiency in the existing technology. This achieves a high-efficiency and damage-resistant laser beam combining effect, suitable for high-power laser systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2025-04-01
- Publication Date
- 2026-07-17
AI Technical Summary
Existing reflective polarization beam combiners suffer from problems such as limited wavelength range, low diffraction efficiency, insufficient resistance to laser damage, and complex fabrication, making it difficult to meet the needs of high-power laser systems.
A reflective all-dielectric polarization beam combiner is adopted, which consists of a trapezoidal groove profile grating etching layer, a matching layer and a periodic film system. By superimposing high refractive index and low refractive index material layers, the grating parameters are optimized to achieve high reflectivity, wide bandwidth and low temperature rise distortion, and it is suitable for efficient beam combining in any band.
It achieves efficient beam combining of TE and TM polarized light in arbitrary wavelengths, with an average diffraction efficiency exceeding 90%, improved resistance to laser damage, applicability to high-power laser systems, and ease of fabrication, thus promoting the development of high-power laser beam combining technology.
Smart Images
Figure CN120447118B_ABST