JCC  Vol.2 No.2 , January 2014
Image Enhancement in Coherent Optical Amplification by Photorefractive Crystals
Abstract

In this paper, a model of two-wave mixing in the photorefractive crystal, which takes account of the difference in spatial frequency in a beam, has been built to study the image enhancement effect in coherent optical amplification. Based on the theoretical analysis of the model, the gain distribution for each pixel in the signal beam has been obtained. It shows that the unevenness of the gain is induced by the difference in spatial frequency in the beam. The factors that impact on the uniformity of image enhancement have been analyzed. As an example, the effects of these factors in a given photorefractive crystal have been studied through simulation.


Cite this paper
Chen, D. , Tian, F. , Liu, Y. , Hu, Y. and Han, L. (2014) Image Enhancement in Coherent Optical Amplification by Photorefractive Crystals. Journal of Computer and Communications, 2, 42-47. doi: 10.4236/jcc.2014.22008.
References

[1]   N. V. Kukhrarev, V. B. Markov, S. G. Odulov, M. S. Soskin and V. L. Vinetskii, “Holographic Storage in Electro-Optic Crystals. I. Steady State”, Ferroelectrics, Vol. 22, No. 1, 1978, pp. 949-953. http://dx.doi.org/10.1080/00150197908239450

[2]   M. C. Søren, B. Jensen, J. P. Huignard and P. M. Petersen, “Two-Wave Mixing in a Broad-Area Semiconductor Amplifier,” Optics Express, Vol. 14, No. 25, 2006, pp. 12373- 12379. http://dx.doi.org/10.1364/OE.14.012373

[3]   M. C. S?ren, B. Jensen, J. P. Huignard and P. M. Petersen, “Nonlinear Gain Amplification Due to Two-Wave Mixing in a Broad-Area Semiconductor Amplifier with Moving Gratings,” Optics Express, Vol. 16, No. 8, 2008, pp. 5565-5571. http://dx.doi.org/10.1364/OE.16.005565

[4]   P. Günter and J. P. Huignard, “Photorefractive Materials and Their Applications II,” Springer-Verlag, Berlin, 1989.

[5]   N. Katyal, Natasha, A. Roy and A. Kapoor, “The Influence of Pump Beam Polarization on the Signal Beam, in TWM in Photorefractive Crystals: Transmission Geometry,” Optik, Vol. 122, No. 3, 2011, pp. 207-210. http://dx.doi.org/10.1016/j.ijleo.2009.11.028

[6]   J. P. Huignard and A. Marrakchi, “Coherent Signal Beam Amplification in Two-Wave Mixing Experiments with Photorefractive Bi12SiO20 Crystals,” Optics Communications, Vol. 38, No. 4, 1981, pp. 249-254. http://dx.doi.org/10.1016/0030-4018(81)90392-8

[7]   Y. Fainman, E. Klancnik and S. H. Lee, “Optimal Coherent Image Amplification by Two-Wave Coupling in Photorefractive BaTiO3,” Optical Engineering, Vol. 25, No. 2, 1986, pp. 228-234. http://dx.doi.org/10.1117/12.7973810

[8]   P. Tayebati and D. Mahgerefteh, “Theory of the photorefractive effect for Bi12SiO20 and BaTiO3 with shallow traps,” Journal of the Optical Society of America B, Vol. 8, No. 5, 1991, pp. 1053-1064. http://dx.doi.org/10.1364/JOSAB.8.001053

[9]   B. G. Peng, F. Chen, Y. Tan and D. Kip, “Two-Wave Mixing of Ion-Implanted Photorefractive Waveguides in Near-Stoichiometric Fe:LiNbO3 Crystals,” Optics Materials, Vol. 33, No. 6, 2011, pp. 773-776. http://dx.doi.org/10.1016/j.optmat.2010.12.016

[10]   Jiabi Chen, “Principle and Application of Laser,” Tongping Han, Beijing, 2004.

[11]   D. Z. Anderson and R. Saxena, “Theory of Multi-mode Operation of a Unidirectional Ring Oscillator Having Photorefractive Gain: Weak Field Limit,” Journal of the Optical Society of America B, Vol. 4, No. 2, 1987, pp. 164-176. http://dx.doi.org/10.1364/JOSAB.4.000164

[12]   Z. Y. Li, B. Y. Gu and G. Z. Yang, “Slowly Varying Amplitude Approximation Appraised by Transfer-Matrix Approach,” Physical Review B, Vol. 60, No. 15, 1999, pp. 10644-10647. http://dx.doi.org/10.1103/PhysRevB.60.10644

[13]   C. H. Yang and L. Sun, “Photorefractive Nonliear Optical Materials: LiNbO3 Crystals,” Jiafu Yang, Beijing, 2009.

[14]   T. K. Yadav, M. K. Maurya and R. A. Yadav, “Effect of Photoconductivity and Oscillation Frequency Shift on the Signal Beam Intensity in Two Beam Coupling in Photorefractive Materials,” Optik, Vol. 122, No. 18, 2011, pp. 1607-1614. http://dx.doi.org/10.1016/j.ijleo.2010.10.011

 
 
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