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arXiv 1506.04516physics.optics
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空芯光纤中氢原子的差分高分辨受激CW拉曼光谱

Differential high-resolution stimulated CW Raman spectroscopy of hydrogen in a hollow-core fiber

Philip G. Westergaard, Mikael Lassen, Jan C. Petersen

摘要:

我们展示了灵敏的高分辨率受激拉曼测量氢使用空芯光子晶体光纤(HC-PCF)。拉曼跃迁由窄线宽(<50 kHz)1064 nm连续波(CW)光纤激光器泵浦。探测光由自制的CW光学参量振荡器(OPO)产生,可在800 nm到1300 nm(线宽~ 5 MHz)之间调谐。这些窄线宽激光器的光谱分辨率约为10^-4 cm^(-1)。该装置采用差分测量技术来抑制探测光束中的噪声,同时也消除了来自光纤的背景信号。在获得高灵敏度的情况下,在泵浦光和探测光中仅用几mW的光功率就观察到拉曼信号。该演示允许分子的高分辨率拉曼识别和拉曼信号强度的量化。

英文摘要:

We demonstrate sensitive high-resolution stimulated Raman measurements of hydrogen using a hollow-core photonic crystal fiber (HC-PCF). The Raman transition is pumped by a narrow linewidth (<50 kHz) 1064 nm continuous-wave (CW) fiber laser. The probe light is produced by a homebuilt CW optical parametric oscillator (OPO), tunable from around 800 nm to 1300 nm (linewidth ~ 5 MHz). These narrow linewidth lasers allow for an excellent spectral resolution of approximately 10^-4 cm^(-1). The setup employs a differential measurement technique for noise rejection in the probe beam, which also eliminates background signals from the fiber. With the high sensitivity obtained, Raman signals were observed with only a few mW of optical power in both the pump and probe beams. This demonstration allows for high resolution Raman identification of molecules and quantification of Raman signal strengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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