Abstract

Conventional Raman measurements are performed with various laser lines in the visible region. Recently more interest has been directed toward the use of ultraviolet laser lines, which are exactly or nearly in resonance with electronic absorptions of a wider range of compounds. Then, what about the use of near-infrared laser light? Obviously, the use of a near-infrared laser line for Raman excitation has a drawback which is manifested in the <i>v</i>⁴ rule; the absolute intensity of a Raman band at 1000 cm⁻¹ measured with the Nd:YAG 1064-nm line is only 3.4% of that measured with the Ar⁺ 488.0-nm line, provided that the power of each laser line is equal. Furthermore, detectors available for the near-infrared region do not seem comparable with photomultipliers or intensified diode-array detectors normally used for Raman measurements in the visible and ultraviolet regions. However, Raman excitation with a near-infrared laser line is still attractive as a possible means of solving the problem of "fluorescence," which frequently hinders Raman measurements. Following a Japanese saying similar to "The proof of the pudding is in the eating," we are trying to examine this possibility. Our preliminary results are reported below.

Long-cavity Nd:YAG laser used in single-shot spontaneous Raman scattering measurements

Guillaume Cléon, Denis Stepowski, and Armelle Cessou
Opt. Lett. 32(22) 3290-3292 (2007)

Stimulated vibrational–rotational Raman scattering of hydrogen pumped at a 1064-nm laser

Xianglong Cai, Ming Xu, Yuxi Jia, Jinbo Liu, Pengyuan Wang, Ying Chen, Baodong Gai, Yong Tan, Hongxing Cai, and Jingwei Guo
Appl. Opt. 62(5) 1274-1278 (2023)

Application of 266-nm and 355-nm Nd:YAG laser radiation for the investigation of fuel-rich sooting hydrocarbon flames by Raman scattering

Jan Egermann, Thomas Seeger, and Alfred Leipertz
Appl. Opt. 43(29) 5564-5574 (2004)

High-efficiency 1064  nm nonplanar ring oscillator Nd:YAG laser with diode pumping at 885  nm

Weiping Deng, Tao Yang, Jianping Cao, Erjun Zang, Liufeng Li, Lisheng Chen, and Zhanjun Fang
Opt. Lett. 43(7) 1562-1565 (2018)

Frequency stabilization of Nd:YAG lasers to ¹³³Cs₂ sub-Doppler lines near 1064 nm

E. Inbar, V. Mahal, and A. Arie
J. Opt. Soc. Am. B 13(7) 1598-1604 (1996)