Optical Limiting in a Photorefractive Polymer

1997 ◽  
Vol 479 ◽  
Author(s):  
A. Grunnet-Jepsen ◽  
C. L. Thompson ◽  
W. E. Moerner
Keyword(s):  
Phase Conjugation ◽  
Optical Limiting ◽  
High Gain ◽  
Optical Beam ◽  
Device Application ◽  
Photorefractive Polymers ◽  
Optical Limiter ◽  
Photorefractive Polymer ◽  
Salient Features

AbstractOptical limiting has been suggested as a possible device application of high gain photorefractive (PR) polymers. The principle of operation relies on the existence of amplified scattering (beam fanning) to deplete the intensity of the incident coherent optical beam. The newest photorefractive polymers show a combination of high gain and reasonable speed, and we show how these materials behave as a beam fanning optical limiter and as a limiter based on self-pumped phase conjugation. A prototype cascaded beam fanning device is demonstrated and its salient features are discussed.

Multiwave coupling in a high-gain photorefractive polymer

1999 ◽  
Vol 24 (9) ◽  
pp. 593 ◽  
Author(s):  
K. Matsushita ◽  
P. P. Banerjee ◽  
S. Ozaki ◽  
D. Miyazaki
Keyword(s):  
High Gain ◽  
Photorefractive Polymer

scholarly journals Study on the choosing of new SBS medium perfluoro-compound for phase conjugation mirror and optical limiter

2009 ◽  
Vol 58 (1) ◽  
pp. 304
Author(s):  
Gong Sheng ◽  
Hasi Wu-Li-Ji ◽  
Lyu Zhi-Wei ◽  
Dong Fen-Li ◽  
Lin Dian-Yang ◽  
...  
Keyword(s):  
Phase Conjugation ◽  
Optical Limiter

OPTICAL LIMITING STUDIES IN PHOTOREFRACTIVE PURE AND IRON-DOPED Bi12SiO20 CRYSTALS

2000 ◽  
Vol 09 (02) ◽  
pp. 217-225 ◽  
Author(s):  
P. SREERAMANA AITHAL ◽  
P. PREM KIRAN ◽  
D. NARAYANA RAO
Keyword(s):  
Excited State Absorption ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Limiting Behavior ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Iron Incorporation ◽  
Optical Limiter ◽  
Level Model

Optical limiting characteristics of pure and 150 ppm Fe-doped Bi 12 SiO 20 (BSO:Fe) crystals are studied at high intensity nanosecond pulse regime. When the input light is at 532 nm and at 595 nm with 6 ns pulse duration, a good optical limiting behavior is observed due to simultaneous effect of trap assisted excited state absorption and two photon absorption. The precise role of the internal defects due to impurity centers present in the crystal lattice is explained on the basis of a four level model. This study reveal that the increased nonlinear absorption due to iron incorporation in BSO makes it an excellent passive optical limiter.

Photorefractive Beam Fanning Optical Limiter

1997 ◽  
Vol 479 ◽  
Author(s):  
M. J. Miller ◽  
G. L. Wood ◽  
G. J. Salamo
Keyword(s):  
Response Time ◽  
Electric Fields ◽  
Optical Limiting ◽  
Major Obstacle ◽  
Speed Of Response ◽  
Optical Limiter

AbstractWe have investigated the potential for using photorefractive phenomena in optical limiting devices. The major obstacle preventing the photorefractive limiter from reaching this potential has been speed of response. In this paper we report on several techniques which are successful in enhancing the photorefractive beam fanning response time. In particular, we demonstrate and characterize the use of applied electric fields, gratings to seed the beam fan, and cylindrical focusing. We also report the first demonstration of a prototype beam fanning optical limiter encompassing many of the proposed improvements.

Nonlinear optical beam propagation for optical limiting

1999 ◽  
Vol 38 (24) ◽  
pp. 5168 ◽  
Author(s):  
Dmitriy I. Kovsh ◽  
Sidney Yang ◽  
David J. Hagan ◽  
Eric W. Van Stryland
Keyword(s):  
Nonlinear Optical ◽  
Beam Propagation ◽  
Optical Limiting ◽  
Optical Beam

DYNAMIC HOLOGRAPHIC IMAGING USING PHOTOREFRACTIVE POLYMERS BASED ON A BORONATE-DERIVATIVE NONLINEAR CHROMOPHORE

2007 ◽  
Vol 21 (15) ◽  
pp. 2625-2634 ◽  
Author(s):  
J. L. MALDONADO ◽  
G. RAMOS-ORTÍZ ◽  
O. BARBOSA-GARCÍA ◽  
M. A. MENESES-NAVA ◽  
L. MÁRQUEZ ◽  
...  
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
New Class ◽  
Holographic Imaging ◽  
Writing Beam ◽  
Photorefractive Polymers ◽  
Electro Optic ◽  
Photorefractive Polymer ◽  
One Year ◽  
Test Objects

We report dynamic holographic imaging with organic photorefractive polymer composites, doped with the electro-optic chromophore (2-(p-chlorophenyl)-(3′-nitrobenzo[d])-(4′′-methoxybenzo[h])-1,3-dioxa-6-aza-2-boracyclonon-6-ene, a push-pull molecule derived from a new class of boronates. The composites are based on the photoconductor poly(9-vinylcarbazole) (PVK) as the polymer matrix, and 9-ethylcarbazole (ECZ) as the plasticizer, with the fullerene C 60 as sensitizer. A tilted four-wave mixing geometry was used to record and reconstruct two-dimensional test objects, using a 10 mW He – Ne laser (632.8 nm). The recording response time was less than one second for a light intensity of ≈350 mW/cm 2 in each writing beam. The erasing time had a similar value. These composites have been used for over one year with no appreciable signs of degradation or crystallization.

Infrared-sensitive photorefractive polymer composites and fully functionalized polymethacrylates with high gain and dynamic range

2002 ◽  
Author(s):  
Eric Hendrickx ◽  
David Van Steenwinckel ◽  
Christiaan Engels ◽  
Mark Schaerlaekens ◽  
Elke Gubbelmans ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Dynamic Range ◽  
High Gain ◽  
Photorefractive Polymer
Sign in / Sign up

Export Citation Format

Share Document