TY - JOUR
T1 - Analysis of laser M2 determination in a quadriwave lateral shearing interferometer with CCD vertical blooming
AU - Meng, Lingqiang
AU - Liu, Yiming
AU - Han, Zhigang
AU - Shen, Hua
AU - Chen, Lei
AU - Zhu, Rihong
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2/15
Y1 - 2019/2/15
N2 - Charge-coupled device (CCD) vertical blooming is inevitable in silicon-based cameras when near-infrared lasers are measured. In this study, we analyze the mechanism responsible for the influence of CCD vertical blooming on the beam quality factor (M2) measurement with a quadriwave lateral shearing interferometer (QWLSI). Based on a CCD vertical blooming model, we reconstruct the bloomed interferogram, which is used to retrieve the intensity and phase distributions of the laser. Then, the relationship between the M2 and degree of CCD vertical blooming is revealed. In addition, the M2 of single- and multi-mode lasers is measured with the QWLSI under different degrees of vertical blooming streaks. The results from the experiment are reasonably consistent with the simulation results. Meanwhile, the method of improving the exposure time of CCD camera for suppressing the blooming is also analyzed, indicating that the method can effectively suppress the influence of the blooming on the M2 measurement in a QWLSI.
AB - Charge-coupled device (CCD) vertical blooming is inevitable in silicon-based cameras when near-infrared lasers are measured. In this study, we analyze the mechanism responsible for the influence of CCD vertical blooming on the beam quality factor (M2) measurement with a quadriwave lateral shearing interferometer (QWLSI). Based on a CCD vertical blooming model, we reconstruct the bloomed interferogram, which is used to retrieve the intensity and phase distributions of the laser. Then, the relationship between the M2 and degree of CCD vertical blooming is revealed. In addition, the M2 of single- and multi-mode lasers is measured with the QWLSI under different degrees of vertical blooming streaks. The results from the experiment are reasonably consistent with the simulation results. Meanwhile, the method of improving the exposure time of CCD camera for suppressing the blooming is also analyzed, indicating that the method can effectively suppress the influence of the blooming on the M2 measurement in a QWLSI.
KW - Beam quality factor (M)
KW - CCD vertical blooming
KW - Interferometry
KW - Laser characteristic
UR - https://www.scopus.com/pages/publications/85055103088
U2 - 10.1016/j.optcom.2018.10.003
DO - 10.1016/j.optcom.2018.10.003
M3 - Article
AN - SCOPUS:85055103088
SN - 0030-4018
VL - 433
SP - 183
EP - 189
JO - Optics Communications
JF - Optics Communications
ER -