Realization of a robust homodyne quadrature laser interferometer by performing wave plate yawing to realize ultra-low error sensitivity

Abstract

The deviation of wave plates' optical axes from their intended angles, which may result from either instability or assembly error, is the main cause of quadrature phase error in homodyne quadrature laser interferometers (HQLIs). The quadrature phase error sensitivity to wave plate angle deviations, which is an effective measure of HQLI robustness, is further amplified by beam splitter imperfections. In this paper, a new HQLI design involving non-polarization beam splitting is presented, and a method of making this HQLI robust by yawing the wave plates in the measurement and reference arms is proposed. The theoretical analysis results indicate that ultra-low quadrature phase error sensitivities to wave plate angle deviations can be realized and that non-polarizing beam splitter imperfections can be adequately compensated for. The experimental results demonstrate that the proposed method can reduce the quadrature phase error sensitivity by more than 1 order of magnitude, from a theoretical value of 1.4°/1° to 0.05°/1°.

A Short Time Expansion Measurement Method for the Detection of Aging Effect of Lithium Ion Cells Using a High Resolution Laser Interfometric Setup

“…Following the work of Hu. et al [62] and Cui et al [61], a common homodyne laser interferometer was constructed to allow measurement inside a climatic chamber (Memmert IP55). In addition, suitably high mechanical sta-bility of the setup was ensured to minimize parasitic vibration effects.…”

“…Since effects such as lithium plating lead to increased cell expansion, these can be directly detected by a measurement in this SOC range. Homodyne-Michelson interferometers as presented in work [61] and [62] offer a very high measurement accuracy of a few nanometers combined with a high measurement range. This makes an interferometric measurement set-up well suited for building a laboratory system that is independent of cell shape and cell size.…”

Гомодинный Квадратурный Интерферометр Перемещений. Моделирование

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External Modulation Laser Module Assembly for Improving Measurement Performance of Homodyne Interferometry

“…The establishment of the nonlinear error model focuses on the nonideal error analysis of the polarizing prism, depolarizing prism, wave plate, and corner prism [ 10 ]. Moreover, there are many adjustable elements in the optical path of general laser interference, such that the nonlinear error caused by the inaccurate adjustment of the devices in the optical path is also one of the key research points [ 16 ]. By analyzing the influence of each nonideal element on the nonlinear error, the relationship between the position and attitude of each adjustable element and the error is given.…”