On the measurement of the complex spatial coherence of a He-Ne laser beam

1966 ◽  
Vol 42 (1) ◽  
pp. 108-120 ◽  
Author(s):  
J. V. Cornacchio ◽  
K. A. Farnham
Keyword(s):  
Laser Beam ◽  
Spatial Coherence

Spatial coherence of a ruby laser beam by interferometry

1978 ◽  
Vol 17 (21) ◽  
pp. 3500 ◽  
Author(s):  
H. Madjidi-Zolbanine
Keyword(s):  
Laser Beam ◽  
Ruby Laser ◽  
Spatial Coherence

On the measurement of the spatial coherence of a laser beam

1964 ◽  
Vol 33 (6) ◽  
pp. 1705-1709 ◽  
Author(s):  
M. Bertolotti ◽  
B. Daino ◽  
D. Sette
Keyword(s):  
Laser Beam ◽  
Spatial Coherence

Effects of the inclined femto laser incidence at the phase mask on FBG carving

2015 ◽  
Vol 29 (35n36) ◽  
pp. 1550235
Author(s):  
Jian Wang ◽  
Shengli Wu ◽  
Jintao Zhang ◽  
Wenyi Ren
Keyword(s):  
Laser Beam ◽  
Fiber Bragg Grating ◽  
Spatial Coherence ◽  
Frequency Component ◽  
Phase Mask ◽  
Bragg Grating ◽  
Fiber Core

The inclined incidence of the femto laser on the phase mask in fiber Bragg grating (FBG) carving has a significant effect on the quality of FBG fabrication. Based on that the infrared femto laser has highly spatial coherence and the order walk-off will happen behind the phase mask, the interferogram generated at the fiber core by the inclined femto laser beam has been analyzed using the multi-beam interference principle. The influence of beam inclination on the coherence of the 0th and [Formula: see text] orders diffraction with different exposure distance, the visibility of interferogram and the frequency component of the transverse interferogram intensity has also been analyzed. It is meaningful for the FBG fabricating with the femto laser.

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