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SPECIFICATIONS
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Device feature
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Feature value
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Note
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Sampling ratio
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10-3 – 10-4
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Wavelengths
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0.5 mm – 10.6 mm
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Laser power
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> 10 mW
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at visible wavelengths
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Damage threshold
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Not applicable
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Beam size
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< 2”
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Weight
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200 g
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Sampling element only
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Size
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1” x 2”
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Sampling element only
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Price
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Custom quotation
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Includes sampling element and its controller, CCD and profiling software optional.
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Lead time
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8 – 10 weeks
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Varies depending on the laser system
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LAS-AIR makes possible sampling of high energy/ power laser beams through generation of an ultrasound grating in air or in other gaseous propagation medium of the laser beam. Its unique features include:
- no upper limit to the power of the lasers beam for profiling
- no distortions introduced into the beam
- electrically controlled attenuation of the sampled beam to any desired level
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LC
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T
[oC]
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n2
[cm2/W] (a)
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Einc
[J/cm2] (b)
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Eiso
[J/cm2] (c)
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Dn
(d)
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D
[cm2/s] (e)
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e^
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e||
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UFr
[V]
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1005
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12.5 N 48.5 I
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2.0×10-1
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0.073
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0.39
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0.18
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5.3×10-6
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3.0
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3.4
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8.2
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1006
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15 N 53 I
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2.1×10-1
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0.074
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0.39
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0.18
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5.2×10-6
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3.2
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3.6
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9.7
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1007
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17 N 52 I
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2.4×10-1
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0.077
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0.51
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0.18
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5×10-6
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3.2
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3.7
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9.9
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1205
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8 N 59 I
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2.1×10-1
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0.13
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0.73
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0.21
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6.3×10-6
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3.2
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4.0
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9.5
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1207
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16.5 N 63.5 I
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1.9×10-1
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0.14
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0.82
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0.20
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6.2×10-6
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3.2
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3.9
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9.8
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5721
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8 N 70 I
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1.2×10-1
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0.19
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1.35
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0.23
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3.6×10-6
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2.6
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3.3
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15
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8621
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SmA 22 N 72 I
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1.1×10-1
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0.16
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1.64
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0.20
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6.1×10-6
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3.0
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3.3
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19.6
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8721
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SmA 28 N 72I
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1.1×10-1
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0.16
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1.68
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0.21
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8.7×10-6
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3.1
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3.2
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22.8
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4911
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2 N 56 I
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1.9×10-1
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0.075
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0.52
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0.18
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4.7×10-6
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3.3
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3.9
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20.5
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4915
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-7 N 57 I
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2.1×10-1
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0.067
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0.47
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0.18
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4.1×10-6
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3.1
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3.7
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17
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4955
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4 N 63 I
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2.1×10-1
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0.13
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0.93
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0.20
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4.4×10-6
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3.0
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3.7
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19.8
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4913
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3 N 52 I
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2.0×10-1
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0.076
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0.60
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0.20
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4.2×10-6
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3.0
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3.6
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18
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4953
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4 N 57 I
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2.0×10-1
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0.10
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0.79
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0.21
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4×10-6
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3.0
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3.5
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16.3
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3178
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18 N 41.5 I
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1.8×10-1
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0.058
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0.28
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0.14
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5.5×10-6
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2.4
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3.2
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8.5
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3155
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3 N 48 I
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2.2×10-1
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0.11
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0.43
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0.20
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5.1×10-6
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2.6
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3.3
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7.5
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D307
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3 N 34 I
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3.2 ×10-1
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0.016
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0.1
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0.20
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(a) l = 532 nm, I = 4.4×10 -7 W/cm 2, E|| n ( E: light polarization; n: LC orientation), L = 10 mm; (b) l = 409 nm, I = 6.2×10 -3 W/cm 2, L = 10 mm, E|| n ( L is the thickness of LC layer); (c) l = 409 nm, I = 6.2×10 -3 W/cm 2, L = 10 mm, E|| n; (d) l = 633 nm, T = 23 oC; (e) l = 633 nm, T = 23 oC
Constant of nonlinear refraction n2: determines the change in the refractive index n – n0 of the material under the influence of a light beam of power density I according to the formula n – n0 = n2I.
Incubation energy Einc: determines the amount of light energy that the LC has to be exposed to in order to start photoinduced mesophase-isotropic phase transition.
Transition energy Eiso: determines the amount of light energy that LC has to be exposed to in order for the material to be transformed into isotropic phase.
Optical anisotropy Dn: is defined as the difference between the principal values of the refractive indices of LC.
Constant of “orientation diffusion D: allows to evaluate the free relaxation time t of LC director reorientation in cells of thickness L with hard anchoring boundary conditions with the aid of the formula t = L2/ D. The constant of “orientation diffusion” D is related with the orientational viscosity g and the elastic constant K1 of the liquid crystal by the expression D = p2K1/ g.
Constants of dielectric susceptibility: e^ and e|| are the principal values of the dielectric susceptibility of NLC at 1 kHz.
Freedericks transition threshold UF: the minimum voltage necessary to apply to the NLC cell in order to induce NLC reorientation.
References
- U. Hrozhyk, S. Serak, N. Tabiryan, L. Hoke, D. M. Steeves, G. Kedziora, B. Kimball, “High optical nonlinearity of azobenzene liquid crystals for short laser pulses”, Liquid Crystals XII, ed. by I.-C. Khoo, Proc. of SPIE, 7050, 705007 1-11 (2008).
- U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, T. J. Bunning “Optical tuning of the reflection of cholesterics doped with azobenzene liquid crystals”, Adv. Func. Mat. 17, 1735-1742 (2007).
- L. De Sio, A. Veltri, C. Umeton, S. Serak, N. Tabiryan “All-optical switching of holographic gratings made of polymer-liquid-crystal-polymer slices containing azo-compounds”, Appl. Phys. Lett. 93, 181115 (1-3) (2008).
- S.V. Serak, N.V. Tabiryan, “Microwatt power optically controlled spatial solitons in azobenzene liquid crystal”, Proc. of SPIE, Liquid Crystals X, ed. I.-C. Khoo, 6332, 63320-Y1-Y13 (2006).
- U. Hrozhyk, S. Serak, N. Tabiryan, T.J. Bunning, “Wide temperature range azobenzene nematic and smectic LC materials,” Mol. Cryst. & Liq. Cryst. 454, 235-245 (2006).
- S.V. Serak, N.V. Tabiryan, M. Peccianti, G. Assanto, “Spatial soliton all-optical logic gates,” IEEE Photonics Technology Letters, 18 (12), 1287-1289 (2006).
- H. Sarkissian, S. V. Serak, N. V. Tabiryan, L. B. Glebov, V. Rotar, B. Ya. Zeldovich, “Polarization-controlled switching between diffraction orders in transverse-periodically aligned nematic liquid crystals”, Opt. Lett., 31, 2248-2250 (2006).
- N. Tabiryan, U. Hrozhyk, S. Serak, “Nonlinear refraction in photoinduced isotropic state of liquid crystalline azobenzenes,” Phys. Rev. Lett. 93 (11), 113901-1- 113901-4 (2004).
- N.V. Tabiryan, S.V. Serak, V.A. Grozhik, “Photoinduced critical opalescence and reversible all-optical switching in photosensitive liquid crystals,” Journal of Optical Society of America JOSA B, 20 ( 3), 538-544 (2003)
750
900
720
BEAM Co., 809 S. Orlando Ave., Suite I , Winter Park , FL ,
32789 , USA 407-629-1282
Tel. 877-803-6579 (toll-free)
Fax 407-629-0460
e-mail: sales@beamco.com
http://www.beamco.com/
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