Study of techniques for efficient nonlinear frequency conversion of fibre lasers to the visible wavelength band

光纤激光器可见光波段高效非线性频率转换技术研究

• 批准号: 2613918
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2613918
• 关键词: Study; techniques; efficient; nonlinear; frequency

Scaling laser power in the visible band remains as one of the most significant challenges facing laser scientists, motivated by the needs of a growing number of applications in areas such laser processing of materials and medicine. Traditional methods for accessing this wavelength regime are not compatible with operation at high power levels and so a different approach is needed. This project will investigate a new strategy for generating kilowatt-class laser power in the visible band by combining the power-scaling advantages of cladding-pumped fibre lasers in the near-infrared band with novel nonlinear frequency conversion schemes. The approach offers the prospect of unprecedented wavelength coverage across the entire visible wavelength band at high power levels and with high overall efficiency. The project will involve a detailed study into the physics of frequency-converted fibre lasers to establish a power scaling strategy and to determine the fundamental limits. It is anticipated that development of strategies to suppress unwanted nonlinear processes in the fibre laser and to mitigate thermal effects due to residual heating in optical components will be important aspects of the project. The overall ambition of the project will be a new generation of visible lasers boasting levels of performance well beyond the current state-of-the-art for use in industrial laser processing.

在可见频段中扩展激光功率仍然是激光科学家面临的最重大挑战之一，这是由于越来越多的材料和医学加工等领域应用中应用的需求。访问此波长制度的传统方法与高功率水平的操作不兼容，因此需要另一种方法。该项目将通过结合近红外频段中覆层式光纤激光器的功率尺度优势与新型的非线性频率转换方案相结合，从而研究一种新的策略，以在可见频段中产生千瓦级激光功率。该方法为整个可见的波长频段的前景提供了前所未有的波长覆盖，并具有高功率水平和高效率的前景。该项目将涉及对频率转换纤维激光器物理学的详细研究，以建立功率扩展策略并确定基本限制。可以预料，由于光纤激光器中抑制不需要的非线性过程的策略，并且由于光学组件中残留的加热而减轻热效应的策略将是该项目的重要方面。该项目的整体野心将是新一代可见的激光器，其性能水平远远超出了当前用于工业激光处理的最新用途。