概括
一个新的深红色拉曼激光系统提供735和750nm的调节纳秒脉冲. 这种激光技术对先进的生物医学光声成像应用具有前途.
科学领域:
- 光学和光子学 在光学和光子学.
- 激光物理 激光物理
- 生物医学工程 生物医学工程
背景情况:
- 开发可调节的高功率脉冲激光器对于先进的成像技术至关重要.
- 深红激光特别适用于生物医学应用,因为其可以穿透组织并减少自身光.
研究的目的:
- 为了演示波长可选择的纳秒脉冲深红色拉曼激光在735和750nm运行.
- 优化激光参数以提高输出功率和能量.
- 评估生物医学光声成像的潜力.
主要方法:
- 使用了一种声光Q开关内腔频率翻倍的KGW拉曼激光系统.
- 采用一个 π-极化 Nd:YLF 激光器在 1321 nm 作为源.
- 包含一个正面球形镜头来补偿热透镜和稳定共振器.
主要成果:
- 在4kHz的重复率下,达到2.1W (735nm) 和2.8W (750nm) 的最大平均输出功率.
- 在1kHz的重复率下,获得的脉冲能量为1.2mJ (735nm) 和1.6mJ (750nm).
- 已证明高达377 kW (735 nm) 和308 kW (750 nm) 的峰值功率,脉冲宽度为纳秒.
结论:
- 开发的深红色拉曼激光系统提供可调节的,高能纳米秒脉冲.
- 输出波长 (735nm和750nm) 与特定的光染料非常相匹配.
- 激光系统对生物医学光声成像应用具有显著的潜力.
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