研究目的
Investigating the fabrication of trapezoidal ridge waveguides in YCOB nonlinear optical crystals for efficient second harmonic generation.
研究成果
The study successfully fabricated low-loss trapezoidal ridge waveguides in YCOB crystals, demonstrating efficient second harmonic generation. The waveguides showed improved performance in terms of output power and conversion efficiency compared to previous studies, attributed to precise fabrication techniques.
研究不足
The study is limited by the precision of diamond-blade dicing and the quality of ion irradiation, which may affect waveguide performance. Additionally, the nonlinear coefficient of YCOB crystal is relatively low compared to other materials like KTP.
1：Experimental Design and Method Selection:
The study involved the fabrication of trapezoidal ridge waveguides in YCOB crystals using carbon ion irradiation and precise diamond-blade dicing. The methodology included the reconstruction of refractive index profiles and the measurement of modal distributions.
2：Sample Selection and Data Sources:
YCOB crystal samples were used, with dimensions of 10 × 8 × 2 mm3, cut along a specific orientation for type I birefringent phase matching.
3：List of Experimental Equipment and Materials:
Equipment included a 3 MV tandem accelerator for carbon ion irradiation, a diamond blade for dicing, and various lasers and detectors for SHG measurements.
4：Experimental Procedures and Operational Workflow:
The process involved ion irradiation, diamond-blade dicing, and the measurement of SHG efficiency under continuous and pulsed laser excitation.
5：Data Analysis Methods:
Data analysis included the reconstruction of refractive index profiles and the simulation of guided modes using Rsoft Beam PROP 8.0 software.
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