Laser speckle suppression by the phase modulation of input beam in a multimode fiber

2014 ◽  
Author(s):  
Cong Yang ◽  
Jian Han ◽  
Yuanjie Wu ◽  
Huiqi Ye ◽  
Dong Xiao
Keyword(s):  
Phase Modulation ◽  
Laser Speckle ◽  
Input Beam ◽  
Multimode Fiber ◽  
Speckle Suppression

Laser Speckle Suppression Based on Tunable Metasurface

2020 ◽  
Vol 49 (7) ◽  
pp. 724001
Author(s):  
程进 Jin CHENG ◽  
周顺 Shun ZHOU ◽  
孙雪平 Xue-ping SUN ◽  
蒲欣欣 Xin-xin PU ◽  
孙其梁 Qi-liang SUN ◽  
...  
Keyword(s):  
Laser Speckle ◽  
Speckle Suppression

Fast laser speckle suppression with an intracavity diffuser

2021 ◽  
pp. 131-138
Author(s):  
Simon Mahler ◽  
Yaniv Eliezer ◽  
Hasan Yılmaz ◽  
Asher A. Friesem ◽  
Nir Davidson ◽  
...  
Keyword(s):  
Laser Speckle ◽  
Speckle Suppression

Comparison of laser speckle suppression due to angle diversity

2017 ◽  
Vol 46 (8) ◽  
pp. 806004
Author(s):  
徐美芳 Xu Meifang ◽  
丁俊文 Ding Junwen ◽  
王冠军 Wang Guanjun ◽  
张秀丽 Zhang Xiuli ◽  
赵英亮 Zhao Yingliang
Keyword(s):  
Laser Speckle ◽  
Angle Diversity ◽  
Speckle Suppression

Contra-directional two-beam coupling by use of a single input beam in an iron-doped lithium niobate multimode fiber

2002 ◽  
Vol 41 (32) ◽  
pp. 6890 ◽  
Author(s):  
D. R. Evans ◽  
M. A. Saleh ◽  
T. J. Bunning ◽  
L. Lu ◽  
R. S. Meltzer ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Input Beam ◽  
Multimode Fiber ◽  
Beam Coupling ◽  
Iron Doped ◽  
Single Input

Two mechanisms of phase modulation in multimode fiber-optic interferometers

2000 ◽  
Vol 26 (1) ◽  
pp. 70-74 ◽  
Author(s):  
L. I. Kosareva ◽  
O. I. Kotov ◽  
L. B. Liokumovich ◽  
S. I. Markov ◽  
A. V. Medvedev ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Fiber Optic ◽  
Multimode Fiber

Laser Speckle Suppression with Multiple Scattering Schemes Introduced by Cascade Diffusers

2014 ◽  
Vol 34 (4) ◽  
pp. 0414002
Author(s):  
徐美芳 Xu Meifang ◽  
高文宏 Gao Wenhong ◽  
石云波 Shi Yunbo ◽  
李江澜 Li Jianglan
Keyword(s):  
Multiple Scattering ◽  
Laser Speckle ◽  
Speckle Suppression

scholarly journals Fast laser speckle suppression with an intracavity diffuser

Nanophotonics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 129-136
Author(s):  
Simon Mahler ◽  
Yaniv Eliezer ◽  
Hasan Yılmaz ◽  
Asher A. Friesem ◽  
Nir Davidson ◽  
...  
Keyword(s):  
Laser Emission ◽  
Laser Speckle ◽  
Integration Time ◽  
Lasing Spectrum ◽  
Time Resolved ◽  
Full Field ◽  
Laser Illumination ◽  
Transverse Modes ◽  
Field Imaging ◽  
Speckle Suppression

AbstractFast speckle suppression is crucial for time-resolved full-field imaging with laser illumination. Here, we introduce a method to accelerate the spatial decoherence of laser emission, achieving speckle suppression in the nanosecond integration time scale. The method relies on the insertion of an intracavity phase diffuser into a degenerate cavity laser to break the frequency degeneracy of transverse modes and broaden the lasing spectrum. The ultrafast decoherence of laser emission results in the reduction of speckle contrast to 3% in less than 1 ns.

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