scholarly journals 302 W quasi-continuous cascaded diamond Raman laser at 15 microns with large brightness enhancement

2018 ◽  
Vol 26 (16) ◽  
pp. 19797 ◽  
Author(s):  
Zhenxu Bai ◽  
Robert J. Williams ◽  
Ondrej Kitzler ◽  
Soumya Sarang ◽  
David J. Spence ◽  
...  
Keyword(s):  
Raman Laser ◽  
Brightness Enhancement

scholarly journals Brightness enhancement and beam profiles in an LD-pumped graded-index fiber Raman laser

OSA Continuum ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 1034
Author(s):  
Alexey G. Kuznetsov ◽  
Sergey I. Kablukov ◽  
Evgeny V. Podivilov ◽  
Sergey A. Babin
Keyword(s):  
Raman Laser ◽  
Graded Index ◽  
Brightness Enhancement

scholarly journals Over 400 W graded-index fiber Raman laser with brightness enhancement

2021 ◽  
Author(s):  
Chenchen Fan ◽  
Yizhu Chen ◽  
Tianfu Yao ◽  
Hu Xiao ◽  
Xu Jiangming ◽  
...  
Keyword(s):  
Raman Laser ◽  
Graded Index ◽  
Brightness Enhancement

scholarly journals Large brightness enhancement for quasi-continuous beams by diamond Raman laser conversion

2018 ◽  
Vol 43 (3) ◽  
pp. 563 ◽  
Author(s):  
Zhenxu Bai ◽  
Robert J. Williams ◽  
Hadiya Jasbeer ◽  
Soumya Sarang ◽  
Ondrej Kitzler ◽  
...  
Keyword(s):  
Raman Laser ◽  
Brightness Enhancement ◽  
Continuous Beams

Brightness enhancement of continuous-wave beams using a diamond Raman laser

2017 ◽  
Author(s):  
Zhenxu Bai ◽  
Robert J. Williams ◽  
Hadiya Jasbeer ◽  
Soumya Sarang ◽  
Aaron McKay ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Raman Laser ◽  
Brightness Enhancement

Semiconductor Raman laser with resonator film transparent to pump light

1991 ◽  
Vol 138 (6) ◽  
pp. 396 ◽  
Author(s):  
K. Suto ◽  
T. Kimura ◽  
J. Nishizawa
Keyword(s):  
Raman Laser ◽  
Pump Light

Non-Plasmonic SERS with Silicon: Is It Really Safe? New Insights into Opto-Thermics of Core/Shell Microbeads

2018 ◽  
Author(s):  
Nicolò Bontempi ◽  
Irene Vassalini ◽  
Stefano Danesi ◽  
Matteo Ferroni ◽  
Paolo Colombi ◽  
...  
Keyword(s):  
Critical Role ◽  
Raman Laser ◽  
Core Shell ◽  
Thermal Coupling ◽  
Melting Points ◽  
Experimental Proof ◽  
Weakly Coupled ◽  
Light Management ◽  
Laser Sources ◽  
First Time

<p>Here we investigate for the first time the opto-thermal behavior of SiO<sub>2</sub>/Si core/shell microbeads (Si-rex) irradiated with three common Raman laser sources (lambda=532, 633, 785 nm) under real working conditions. We obtained an experimental proof of the critical role played by bead size and aggregation in heat and light management, demonstrating that in the case of strong opto-thermal coupling the temperature can exceed that of the melting points of both core and shell components. In addition, we also show that weakly coupled beads can be utilized as stable substrates for plasmon-free SERS experiments.</p>

Underwater Image Enhancement Method Combining color and Luminance

2020 ◽  
Vol 13 ◽  
Author(s):  
ZHAO Baiting ◽  
WANG Feng ◽  
JIA Xiaofen ◽  
GUO Yongcun ◽  
WANG Chengjun
Keyword(s):  
Image Enhancement ◽  
Color Space ◽  
Low Frequency ◽  
Brightness Enhancement ◽  
Color Distortion ◽  
Underwater Image ◽  
Enhancement Method ◽  
Frequency Components ◽  
Image Contour ◽  
Objective Indicators

Background:: Aiming at the problems of color distortion, low clarity and poor visibility of underwater image caused by complex underwater environment, a wavelet fusion method UIPWF for underwater image enhancement is proposed. Methods:: First of all, an improved NCB color balance method is designed to identify and cut the abnormal pixels, and balance the color of R, G and B channels by affine transformation. Then, the color correction map is converted to CIELab color space, and the L component is equalized with contrast limited adaptive histogram to obtain the brightness enhancement map. Finally, different fusion rules are designed for low-frequency and high-frequency components, the pixel level wavelet fusion of color balance image and brightness enhancement image is realized to improve the edge detail contrast on the basis of protecting the underwater image contour. Results:: The experiments demonstrate that compared with the existing underwater image processing methods, UIPWF is highly effective in the underwater image enhancement task, improves the objective indicators greatly, and produces visually pleasing enhancement images with clear edges and reasonable color information. Conclusion:: The UIPWF method can effectively mitigate the color distortion, improve the clarity and contrast, which is applicable for underwater image enhancement in different environments.

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