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在芯纤维中的2.2微米的拉曼放大,有望扩展中红外源生成的前景
Meng Huang1, Shiyu Sun2, Than S Saini3
1Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK. m.huang@soton.ac.uk.
Light, science & applications
|August 30, 2023
概括
研究人员使用辅助纤维激光器在2微米以上的芯纤维中演示了拉曼放大. 这一突破使气体传感和生物医学分析中的中红外新应用成为可能.
科学领域:
- 光子学和光学工程 光子学和光学工程
- 非线性光学是非线性光学.
- 光纤光学是指光纤的使用.
背景情况:
- 拉曼散射是产生不可用的波长光的关键机制.
- 在2μm附近运行的高功率光纤激光器为中红外 (MIR) 应用提供了机会.
- 将拉曼系统扩展到MIR模式对于气体传感,光谱和生物医学分析至关重要.
研究的目的:
- 为了在超过2微米的芯纤维 (SCF) 平台上演示拉曼发射和放大.
- 探索SCF在产生可调节的MIR光源方面的潜力.
- 为了研究级联拉曼工艺在2-5μm范围内的实际输出功率的可行性.
主要方法:
- 作为源,采用了一种添加纤维激光器,运行在1.99微米.
- 采用了具有微米尺寸核心直径 (~1.6 μm) 和低损耗 (0.2 dB/cm) 的形SCF.
- 研究了拉曼发射和放大特性,包括增强测量和模拟.
主要成果:
- 实现了30.4dB的最大开关峰值增益,峰值功率为10W.
- 在波长超过2微米的波长上证明了拉曼发射和放大.
- 模拟显示,通过连续拉曼过程,扩展SCF长度和可调节的输出功率从2-5μm获得~50dB增强的潜力.
结论:
- 该SCF平台有效地支持中红外区域的拉曼放大.
- 开发的系统显示了可调节的MIR光源产生与实际输出功率的承诺.
- 这项研究为中红外光谱中先进的光谱和传感应用开辟了道路.
相关概念视频
01:26Raman Spectroscopy Instrumentation: Overview
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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01:20Raman Spectroscopy: Overview
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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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