Measurement of M2-Curve for Asymmetric Beams by Self-Referencing Interferometer Wavefront Sensor
College of Engineering, Huaqiao University, Quanzhou 362021, China
Fujian Provincial Academic Engineering Research Centre in Industrial Intelligent Techniques and Systems, Huaqiao University, Quanzhou 362021, China
Academic Editor: Vittorio M. N. Passaro
Received: 17 October 2016 / Revised: 15 November 2016 / Accepted: 23 November 2016 / Published: 29 November 2016
For asymmetric laser beams, the values of beam quality factor
are inconsistent if one selects a different coordinate system or measures beam quality with different experimental conditionals, even when analyzing the same beam. To overcome this non-uniqueness, a new beam quality characterization method named as M2
-curve is developed. The M2
-curve not only contains the beam quality factor
in the x
-direction and y
-direction, respectively; but also introduces a curve of
versus rotation angle α
of coordinate axis. Moreover, we also present a real-time measurement method to demonstrate beam propagation factor M2
-curve with a modified self-referencing Mach-Zehnder interferometer based-wavefront sensor (henceforth SRI-WFS). The feasibility of the proposed method is demonstrated with the theoretical analysis and experiment in multimode beams. The experimental results showed that the proposed measurement method is simple, fast, and a single-shot measurement procedure without movable parts.
This is an open access article distributed under the Creative Commons Attribution License
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MDPI and ACS Style
Du, Y. Measurement of M2-Curve for Asymmetric Beams by Self-Referencing Interferometer Wavefront Sensor. Sensors 2016, 16, 2014.
Du Y. Measurement of M2-Curve for Asymmetric Beams by Self-Referencing Interferometer Wavefront Sensor. Sensors. 2016; 16(12):2014.
Du, Yongzhao. 2016. "Measurement of M2-Curve for Asymmetric Beams by Self-Referencing Interferometer Wavefront Sensor." Sensors 16, no. 12: 2014.
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