Diode laser refractometer for the visible-IR region

Yanko E. Sarov; Simeon C. Sainov

doi:10.1117/12.519485

4 November 2003 Diode laser refractometer for visible-IR region

Yanko E. Sarov, Simeon C. Sainov

Proceedings Volume 5226, 12th International School on Quantum Electronics: Laser Physics and Applications; (2003) https://doi.org/10.1117/12.519485
Event: 12th International School on Quantum Electronics Laser Physics and Applications, 2002, Varna, Bulgaria

Abstract

For all kinds of laser applications it's important to know the refractive indices of materials for the corresponding wavelength. However, most commercial refractometers are equipped with sodium lamp and measure refractive index for a wavelength λ = 589.3 nm. Lack of refractometric data and laser refractometers becomes more grave problem outside the visible region, especially in IR, interesting because of the fast development of fiber and biomedical optics and telecommunications. In this work visible-IR refractometric measurements are performed with a simple diode laser microrefractometer. The device is based on the method of the disappearing diffraction pattern. The refractometer consists of a simple rotary table (1 arcmin resolution), total internal reflection prism, diffraction grating and set of diode lasers, emitting in the red (633 nm) and near IR (796 and 840 nm) region. Results are presented for a set of liquids and are compared with the corresponding values from the literature. The experimental error is estimated of 5.10^-4.

Citation Download Citation

Yanko E. Sarov and Simeon C. Sainov "Diode laser refractometer for visible-IR region", Proc. SPIE 5226, 12th International School on Quantum Electronics: Laser Physics and Applications, (4 November 2003); https://doi.org/10.1117/12.519485

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