Theory of second harmonic generation in collimated light beams with the Gaussian distribution of light intensity for the interaction of typeo+e→e

1974 ◽  
Vol 24 (5) ◽  
pp. 506-521 ◽  
Author(s):  
P. Chmela
Keyword(s):  
Light Intensity ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Gaussian Distribution ◽  
Second Harmonic ◽  
Light Beams

Dynamic control of light beams in second harmonic generation

2015 ◽  
Vol 40 (9) ◽  
pp. 1944 ◽  
Author(s):  
Ana Libster-Hershko ◽  
Sivan Trajtenberg-Mills ◽  
Ady Arie
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Dynamic Control ◽  
Light Beams

All-Optical Poling Properties of the Host-Guest Adulterant Thin-Films

2011 ◽  
Vol 217-218 ◽  
pp. 549-554
Author(s):  
Xue Xi Gao ◽  
Wen Jun Wang ◽  
Yun Long Liu ◽  
Yun Li
Keyword(s):  
Thin Films ◽  
Light Intensity ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Room Temperature ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Poling Temperature ◽  
All Optical ◽  
Second Harmonic Signal

The poling conditions were studied in AOP process by second harmonic generation (SHG) for host-guest adulterant thin-films. The guest was 4’-Nitro-4-dimethylaminoazobenzene and host was PMMA. The experimental results showed that the optimal poling temperature was about room temperature, the optimal ratio of light intensity of fundamental signal (ω) and its second harmonic signal (2ω) during AOP was approximately 100, the thin films had the same rule that the saturated value of SHG depended on the ratio. In addition, we obtained a suitable thickness around 2200nm that the stronger SHG after poling was generated.

scholarly journals Second harmonic generation light quantifies the ratio of type III to total (I + III) collagen in a bundle of collagen fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shukei Sugita ◽  
Takuya Suzumura ◽  
Akinobu Nakamura ◽  
Shinya Tsukiji ◽  
Yoshihiro Ujihara ◽  
...  
Keyword(s):  
Light Intensity ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Fiber Bundle ◽  
Collagen Fiber ◽  
Type I Collagen ◽  
Second Harmonic ◽  
Type I ◽  
Type Iii ◽  
The Relationship

AbstractThe ratio of type III to type I collagen is important for properly maintaining functions of organs and cells. We propose a method to quantify the ratio of type III to total (type I + III) collagen (λIII) in a given collagen fiber bundle using second harmonic generation (SHG) light. First, the relationship between SHG light intensity and the λIII of collagen gels was examined, and the slope (k1) and SHG light intensity at 0% type III collagen (k2) were determined. Second, the SHG light intensity of a 100% type I collagen fiber bundle and its diameter (D) were measured, and the slope (k3) of the relationship was determined. The λIII in a collagen fiber bundle was estimated from these constants (k1-3) and SHG light intensity. We applied this method to collagen fiber bundles isolated from the media and adventitia of porcine thoracic aortas, and obtained λIII = 84.7% ± 13.8% and λIII = 17.5% ± 15.2%, respectively. These values concurred with those obtained with a typical quantification method using sodium dodecyl sulfate–polyacrylamide gel electrophoresis. The findings demonstrated that the method proposed is useful to quantify the ratio of type III to total collagen in a collagen fiber bundle.

Test of directional photoionisation models of second harmonic generation in optical fibres

1992 ◽  
Vol 139 (2) ◽  
pp. 133 ◽  
Author(s):  
N.M. Lawandy ◽  
T.J. Driscoll ◽  
C.L. Adler ◽  
N.M. Lawandy
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Optical Fibres
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