研究目的
Developing high-coupling distributed-feedback (DFB) lasers for the 1.55 mm spectral region to achieve stable single-frequency generation in a broad temperature range.
研究成果
The developed DFB lasers exhibit stable single-frequency lasing with a maximum side-mode suppression ratio exceeding 30 dB, suitable for tunable DFB laser arrays on one chip.
研究不足
The study focuses on the 1.55 mm spectral region and may not be directly applicable to other wavelengths without further research.
1:Experimental Design and Method Selection:
The study involved the development of DFB lasers using molecular-beam epitaxy (MBE) and electron-beam lithography for grating formation.
2:Sample Selection and Data Sources:
Heterostructures were grown on a Riber 49 system, with diffraction gratings formed in specific layers.
3:List of Experimental Equipment and Materials:
Equipment included a Raith Voyager electron-beam lithography system and an MDR-23 monochromator. Materials involved InGaAsP layers and SiO2 masks.
4:Experimental Procedures and Operational Workflow:
The process included two-stage epitaxy, grating formation, and laser characterization in pulsed regime.
5:Data Analysis Methods:
The coupling coefficient was calculated from the Bragg gap spectral width, and spectral measurements were performed to assess laser performance.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容