Power build-up cavity enhanced Raman spectroscopy based on piezoelectric transducer for gas analysis

Xiumei Zhang; Shubo Jiang; Jialin Hu

doi:10.1117/12.2257870

28 February 2017 Power build-up cavity enhanced Raman spectroscopy based on piezoelectric transducer for gas analysis

Xiumei Zhang, Shubo Jiang, Jialin Hu

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102563W (2017) https://doi.org/10.1117/12.2257870
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

In this paper, the Power Build-Up cavity enhanced Raman spectroscopy is introduced and the matching mode between the cavity length and wavelength is improved simultaneously. At the same time, the laser diode optical frequency modulation circuit is designed. Cavity length control system is built up to enhance the cavity power and experiments are also set up. The 532nm laser is coupled into an external linear optical cavity composed of two highly reflective mirrors. Since the light source is a solid laser, center light wavelength is a constant and line width is also known. Considered the distance between concave mirrors, the cavity length is squirmed slightly by the piezoelectric transducer. The light intensity measurement method is designed to record and analyze the performance of the cavity beam power and figure out the non-linear characteristic of system. In the premise of stable initial condition of enhanced system, the operating point is searched firstly which based on feedback control until the beam power is enhanced ultimately. The final experiment illustrates the feasibility of enhanced Raman effects with controlling cavity length and obtaining build-up optical power. The Power Build-Up cavity enhanced Raman spectroscopy has the potential to become a standard method for sensitive gas phase Raman spectroscopy.

Citation Download Citation

Xiumei Zhang, Shubo Jiang, and Jialin Hu "Power build-up cavity enhanced Raman spectroscopy based on piezoelectric transducer for gas analysis", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102563W (28 February 2017); https://doi.org/10.1117/12.2257870

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KEYWORDS

Raman spectroscopy

Transducers

Mirrors

Raman scattering

Semiconductor lasers

Control systems

Frequency modulation

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