Two-photon absorption studies in rare-earth-doped fibers for sensing infrared radiation

2003 ◽  
Author(s):  
B. R. Reddy
Keyword(s):  
Rare Earth ◽  
Infrared Radiation ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Studies ◽  
Doped Fibers ◽  
Rare Earth Doped

Study on Preparation of RGB Tricolor Up-Conversion Fluorescent Powder

2014 ◽  
Vol 1015 ◽  
pp. 566-569
Author(s):  
Chun Hui Niu ◽  
Yong Lv ◽  
Xiao Ying Li ◽  
Qing Shan Chen
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Green Luminescence ◽  
Solid State Method ◽  
Two Photon Absorption ◽  
Co Doping ◽  
Two Photon ◽  
Luminescence Process ◽  
Rare Earth Doped

For producing RGB tricolor luminescence, three kinds of components of rare-earth ions is chosen, which are Er3+doping, Er3+-Yb3+co-doping and Tm3+-Yb3+co-doping, respectively. Three kinds of rare-earth doped up-conversion fluoride material are prepared based on high temperature solid-state method. Under being excited by 980nm laser, three materials emit red, green and blue light, whose peak wavelengths are 660nm, 550nm and 480nm, respectively. Through analysis of luminescence process, it can be concluded that red and green luminescence are belong to two-photon absorption transversion, and blue luminescence is three-photon absorption transversion.

Simulating resonance-mediated two-photon absorption enhancement in rare-earth ions by a rectangle phase modulation

2018 ◽  
Vol 27 (1) ◽  
pp. 013202 ◽  
Author(s):  
Da-Long Qi ◽  
Ye Zheng ◽  
Wen-Jing Cheng ◽  
Yun-Hua Yao ◽  
Lian-Zhong Deng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Phase Modulation ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Absorption Enhancement ◽  
Two Photon Absorption ◽  
Two Photon

Two-photon absorption studies of polymethine, squaraine and tetraon dyes

2006 ◽  
Author(s):  
Jie Fu ◽  
Olga V. Przhonska ◽  
Lazaro A. Padilha ◽  
Scott Webster ◽  
David J. Hagan ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Studies

NONLINEAR ABSORPTION AND OPTICAL LIMITING IN SOLUTIONS OF SOME RARE EARTH SUBSTITUTED PHTHALOCYANINES

2001 ◽  
Vol 10 (01) ◽  
pp. 113-121 ◽  
Author(s):  
K. P. UNNIKRISHNAN ◽  
JAYAN THOMAS ◽  
BINOY PAUL ◽  
ACHAMMA KURIAN ◽  
PRAMOD GOPINATH ◽  
...  
Keyword(s):  
Rare Earth ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Open Aperture ◽  
Pulse Excitation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
532 Nm

Effective nonlinear absorption coefficient, β eff , of solutions of some rare earth substituted phthalocyanines (viz: Sm(Pc)2, Eu(Pc)2 and LaPc) was measured using open aperture Z-scan technique under nanosecond pulse excitation at 532 nm. The effect of nonlinear absorption on optical limiting in these samples was also investigated. Both nonlinear absorption and optical limiting phenomena in these samples are attributed to sequential two-photon absorption (STPA) process.

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