Two beam coupling in semi-insulating GaN using electroabsorption effect

2005 ◽  
Author(s):  
T. Innami ◽  
S. Kitazaki ◽  
R. Fujimura ◽  
M. Nomura ◽  
T. Shimura ◽  
...  
Keyword(s):  
Beam Coupling

Statistical-noise properties of an optical amplifier utilizing two-beam coupling in atomic-potassium vapor

1996 ◽  
Vol 53 (5) ◽  
pp. 3625-3632 ◽  
Author(s):  
W. V. Davis ◽  
A. L. Gaeta ◽  
R. W. Boyd ◽  
G. S. Agarwal
Keyword(s):  
Optical Amplifier ◽  
Beam Coupling ◽  
Potassium Vapor ◽  
Statistical Noise

Description of readout processes during strong beam coupling

2004 ◽  
Vol 69 (6) ◽  
Author(s):  
B. Sturman ◽  
D. M. Giel
Keyword(s):  
Beam Coupling

Photorefractive Materials

MRS Bulletin ◽  
1994 ◽  
Vol 19 (3) ◽  
pp. 29-31 ◽  
Author(s):  
F. Agulló-López
Keyword(s):  
Electric Fields ◽  
Communication Technologies ◽  
Third Order ◽  
Nonlinear Materials ◽  
Light Pattern ◽  
Alternating Electric Fields ◽  
Beam Coupling ◽  
Photorefractive Materials ◽  
A Charge ◽  
Electrooptic Devices

There is a growing demand for nonlinear optical materials for a variety of applications—lasers and coherent sources, electrooptic devices, communication technologies, and optical processors and computers. Nonlinear optics is a vast field requiring materials with diverse performance features. Photorefractive (PR) materials, which experience a change in the refractive index under the effect of inhomogeneous illumination, constitute a relevant branch of the field. They behave as third-order nonlinear materials, which can be considered, in general, as photorefractive. However, the materials more commonly designated as photorefractives involve a charge-transport-induced nonlinearity, and it is these materials which are the object of this issue of the MRS Bulletin.At variance with conventional (often designated as Kerr) nonlinear materials, photorefractives are sensitive not to the local light intensity but to its spatial variation; i.e., they are nonlocal materials. This feature makes them more complicated to deal with than their conventional counterparts, since a χ(3) susceptibility cannot be properly defined (except as a k-dependent function). On the other hand, this sensitivity gives them some unique and interesting features. In particular, an interference light pattern illuminating the crystal and the generated index grating are phase-shifted, leading to remarkable beam coupling and amplification effects. The coupling gain can be markedly enhanced by applying alternating electric fields or by oscillating the interference fringes with a piezoelectric mirror. Efficient image amplifiers have been made using this effect.

Two-beam coupling with chirp controlled pulses in media with two-photon resonances

2003 ◽  
Author(s):  
C.C. Bosco ◽  
G.S. Maciel ◽  
C.B. de Arajo ◽  
L.H. Acioli ◽  
A.M. Simas ◽  
...  
Keyword(s):  
Two Photon ◽  
Beam Coupling

Laser beam coupling into nerve fiber myelin allows one to assess its structural membrane properties

2015 ◽  
Vol 20 (5) ◽  
pp. 050501 ◽  
Author(s):  
Nikolay P. Kutuzov ◽  
Alexey R. Brazhe ◽  
Vladimir L. Lyaskovskiy ◽  
Georgy V. Maksimov
Keyword(s):  
Laser Beam ◽  
Nerve Fiber ◽  
Membrane Properties ◽  
Beam Coupling

Conversion of unpolarized light to polarized light with greater than 50% efficiency by photorefractive two-beam coupling

2000 ◽  
Vol 25 (4) ◽  
pp. 257 ◽  
Author(s):  
John E. Heebner ◽  
Ryan S. Bennink ◽  
Robert W. Boyd ◽  
R. A. Fisher
Keyword(s):  
Polarized Light ◽  
Unpolarized Light ◽  
Beam Coupling
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