Widely tunable green lasers based on the self-frequency doubling material Yb:YAB

2002 ◽  
Author(s):  
Peter Dekker ◽  
Judith Dawes ◽  
Phil Burns ◽  
James Piper
Keyword(s):  
Frequency Doubling ◽  
The Self

Excited state absorption of the self-frequency doubling laser material: Nd:GdCOB

2000 ◽  
Vol 184 (1-4) ◽  
pp. 209-214 ◽  
Author(s):  
C Maunier ◽  
J.L Doualan ◽  
G Aka ◽  
J Landais ◽  
E Antic-Fidancev ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Frequency Doubling ◽  
The Self ◽  
Laser Material

Quantum efficiency of the self-frequency-doubling laser material

1998 ◽  
Vol 10 (35) ◽  
pp. 7901-7905 ◽  
Author(s):  
D Jaque ◽  
J A Muñoz ◽  
F Cussó ◽  
J García Solé
Keyword(s):  
Quantum Efficiency ◽  
Frequency Doubling ◽  
The Self ◽  
Laser Material

Twin structure in Yb:YAl3(BO3)4crystal

2001 ◽  
Vol 34 (5) ◽  
pp. 661-662 ◽  
Author(s):  
Shanrong Zhao ◽  
Jiyang Wang ◽  
Daliang Sun ◽  
Xiaobo Hu ◽  
Hong Liu
Keyword(s):  
Atomic Force Microscopy ◽  
Single Crystals ◽  
Chemical Etching ◽  
Laser Crystal ◽  
Frequency Doubling ◽  
Twin Plane ◽  
The Self ◽  
Twin Structure ◽  
Force Microscopy ◽  
Atomic Force

Twin structure is a defect in the self-frequency-doubling laser crystal material Yb:YAl3(BO3)4(YbYAB). Based on atomic force microscopy (AFM) observations, a check-like twin structure in YbYAB crystals is found. This kind of twin structure has three twin composition planes: (10\bar{1}1), (0\bar{1}11) and (\bar{1}101). These three twin composition planes result in a series of twin boundaries in two directions, forming a check-like pattern on each face. From the orientation of the chemical etching pits on each side of the twin boundary, it is found that the twin element is `twin plane ⊥yaxis', alternatively indicated as `twin plane {11\bar{2}0}'. The two single crystals composing the twin are a right form and a left form. This kind of twin is similar to the Brazil twin found in quartz.

OPTIMIZATION OF GdCOB:Nd AND YCOB:Nd CRYSTALS FOR SELF-FREQUENCY DOUBLING OUT OF THE PRINCIPAL PLANES

2003 ◽  
Vol 12 (03) ◽  
pp. 349-356 ◽  
Author(s):  
ALAIN BRENIER
Keyword(s):  
Cross Section ◽  
Nonlinear Optical ◽  
Laser Emission ◽  
Emission Cross Section ◽  
Frequency Doubling ◽  
Polar Angle ◽  
The Self ◽  
Phase Matching ◽  
Optical Coefficient ◽  
Nonlinear Optical Coefficient

From the linear, nonlinear optical and laser properties of GdCOB:Nd and YCOB:Nd self-frequency doubling crystals, we have found that the slow laser wave at 1060 nm has a higher emission cross-section than the fast one in the whole locus of SH phase matching, meaning that self-frequency doubling should be possible on this whole locus. We have pointed out that the phase matching direction for maximum nonlinear optical coefficient d eff is far from the one for maximum laser emission cross-section. The question of optimum direction for the self-frequency doubling laser was solved with a complete laser modelling. The maximum value of the SH yield occurs at a polar angle θ=68° for GdCOB:Nd , that is to say, close to the value of the optimum nonlinear optical coefficient d eff . For YCOB:Nd , the polar angle at maximum SH yield is shifted at 72°, that is to say, towards the direction of the largest laser emission cross-section. In both cases, we can notice a larger "angular acceptance" on the locus of phase matching for the self-frequency doubling laser than for extra-cavity single pass frequency doubling.

Continuous-wave laser properties of the self-frequency-doubling YAl_3(BO_3)_4: Nd crystal

1998 ◽  
Vol 15 (6) ◽  
pp. 1656 ◽  
Author(s):  
D. Jaque ◽  
J. Capmany ◽  
J. García Solé ◽  
Z. D. Luo ◽  
A. D. Jiang
Keyword(s):  
Continuous Wave ◽  
Frequency Doubling ◽  
The Self ◽  
Continuous Wave Laser ◽  
Wave Laser

Widely tunable yellow-green lasers based on the self-frequency-doubling material Yb:YAB

2003 ◽  
Vol 20 (4) ◽  
pp. 706 ◽  
Author(s):  
Peter Dekker ◽  
Phillip A. Burns ◽  
Judith M. Dawes ◽  
James A. Piper ◽  
Jing Li ◽  
...  
Keyword(s):  
Frequency Doubling ◽  
The Self

Green Microchip Lasers Based on the Self-Frequency Doubling Crystal Nd:GdCa4O(BO3)3

2000 ◽  
Author(s):  
G. Lucas-Leclin ◽  
S.- C. Auzanneau ◽  
F. Balembois ◽  
P. Georges ◽  
A. Brun ◽  
...  
Keyword(s):  
Frequency Doubling ◽  
The Self ◽  
Microchip Lasers

Performances of the Self-Frequency Doubling Nd:GdCOB Crystal Under Diode-Pumping

2005 ◽  
Author(s):  
F. Auge ◽  
F. Mougel ◽  
G. Aka ◽  
A. Kahn-Harari ◽  
D. Vivien ◽  
...  
Keyword(s):  
Frequency Doubling ◽  
The Self ◽  
Diode Pumping

Problem behavior in autism spectrum disorders: A paradigmatic self-organized perspective of network structures

2019 ◽  
Vol 42 ◽  
Author(s):  
Lucio Tonello ◽  
Luca Giacobbi ◽  
Alberto Pettenon ◽  
Alessandro Scuotto ◽  
Massimo Cocchi ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Problem Behaviors ◽  
Autism Spectrum ◽  
The Self ◽  
Network Structures ◽  
Self Organized ◽  
Critical Equilibrium ◽  
Self Organized Criticality ◽  
Acute Agitation ◽  
Spectrum Disorders

AbstractAutism spectrum disorder (ASD) subjects can present temporary behaviors of acute agitation and aggressiveness, named problem behaviors. They have been shown to be consistent with the self-organized criticality (SOC), a model wherein occasionally occurring “catastrophic events” are necessary in order to maintain a self-organized “critical equilibrium.” The SOC can represent the psychopathology network structures and additionally suggests that they can be considered as self-organized systems.

The Nature of Rapidly Extracted Phycocyanin from the Blue-Green Alga Plectonema Boryanum

1971 ◽  
Vol 29 ◽  
pp. 366-367
Author(s):  
M. Kessel ◽  
R. MacColl
Keyword(s):  
Self Assembly ◽  
Analytical Ultracentrifugation ◽  
Uranyl Acetate ◽  
The Self ◽  
Major Protein ◽  
Subunit Structure ◽  
Blue Green Alga ◽  
Thin Sections ◽  
Blue Green Algae ◽  
Cacodylate Buffer

The major protein of the blue-green algae is the biliprotein, C-phycocyanin (Amax = 620 nm), which is presumed to exist in the cell in the form of distinct aggregates called phycobilisomes. The self-assembly of C-phycocyanin from monomer to hexamer has been extensively studied, but the proposed next step in the assembly of a phycobilisome, the formation of 19s subunits, is completely unknown. We have used electron microscopy and analytical ultracentrifugation in combination with a method for rapid and gentle extraction of phycocyanin to study its subunit structure and assembly.To establish the existence of phycobilisomes, cells of P. boryanum in the log phase of growth, growing at a light intensity of 200 foot candles, were fixed in 2% glutaraldehyde in 0.1M cacodylate buffer, pH 7.0, for 3 hours at 4°C. The cells were post-fixed in 1% OsO4 in the same buffer overnight. Material was stained for 1 hour in uranyl acetate (1%), dehydrated and embedded in araldite and examined in thin sections.

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