Optical Kerr materials are strongly recommended for optical self-focusing and defocusing, optical switching activities and optical signal processing. The refractive index of Kerr medium depends on the intensity of applied light pulse passing through it. Kerr medium can be used in frequency conversion if signal having time dependent intensity pattern is passed through such a medium. Earlier this Kerr material was successfully used to convert the frequency of the applied light using a saw-tooth type of intensity varying signal. The shift of frequency can be enhanced by sending the output modulated wave from Kerr medium again to the input of the same medium. Greater amount of frequency shift can be achieved by increasing the number of passing of the light wave through the Kerr medium. Here in this paper the authors propose a method of using Kerr medium for change of light frequency with saw-tooth intensity pattern accommodating the multi-passing technique.

Optical Kerr materials, Optical switching, Frequency conversion, Multi-passing technique

[1] A. Chatterjee, S. Mukhopadhyay, “A New Method of Obtaining an Ultrashort Optical Pulse by the Use of Optical Kerr Material and a Sawtooth Optical Pulse”, IJECT, Vol.6, Issue.1, pp. 42-43, 2015.
[2] A. Chatterjee, A. Biswas, S. Mukhopadhyay, “Method of frequency conversion of Manchester encoded data from a Kerr type of nonlinear medium”, J.Opt., Vol.46, Issue.4, pp. 415-419, 2017.
[3] J. Xu, X. Yu W. Lu, F. Qu, N. Deng, “Offset Manchester coding for rayleigh noise suppression in carrier distributed WDM-POMS”, Opt.Commun., Vol.346, pp. 106-109, 2015.
[4] J. Leuuthold, C-S. Bres, “All-optical pulse shaping for highest spectral efficiency”, Springer Ser. Opt.sci., Vol.194, pp.217-260, 2015.
[5] A. M. Cailean, B. Cagneau, L. Chassagne, “Evaluation of the noise effects on visible light communications using Manchester and Miller coding”, Conference Proceedings, Development and Application System (DAS), IEEE, pp.85-89, 2014. doi: 10.1109/DAA-S.2014.6842433
[6] B. Chakraborty, S. Mukhopadhyay, “Alternative approach of conducting phase-modulated all optical logic gates”, Opt.Eng., Vol. 48, Issue. 3, p.035201, 2009.
[7] M. Vitek, I. Musevic, “Nanosecond control and optical pulse shaping by stimulated emission depletion in a liquid crystal”, Opt. Express., Vol.23, Issue.13, pp.16921-16932, 2015.
[8] S. Dhar, S., Mukhopadhyay, “All optical implementation of ASCII by use of nonlinear material for optical encoding of necessary symbols”, Opt.Eng., Vol.44, Issue.6, p. 065201, 2005.
[9] D. Samanta, S. Mukhopadhyay, “All-optical method for maintaining a fixed intensity level of a light signal in optical computation”, Opt.Commun., Vol.281, Issue.19, pp.4851-4853, 2008.
[10] S. K. Chandra, S. Biswas, S. Mukhopadhyay, “Phase encoded alloptical reconfigurable integrated multilogic unit using phase information processing of four wave mixing in semiconductor optical amplifier”, IET Optoelectronics., Vol.10, Issue.1, pp.1-6, 2016.
[11] S. Sen, S. Mukhopadhyay, “Reduction of VP voltage of an electro-optic modulator by the oblique end cutting and multi-rotation”, Opt. Laser Technol., Elsevier, Vol.59, pp.19-23, 2014.
[12] S. Bhattacharya, S.N. Patra, S. Mukhopadhyay, “An all optical prototype neuron based on optical Kerr material”, Optik-International Journal for Light and Electron Optics., Vol.126, Issue.1, pp.13-18, 2015.
[13] F.E. Robles, M.C. Fischer, W.S. Warren, “Femtosecond pulse shaping enables detection of optical Kerr-effect (OKE) dynamics for molecular imaging”, Opt. Lett., Vol.39, Issue.16, pp.4788-4991, 2014.
[14] S. Biswas, S. Mukhopadhyay, “All-Optical approach for conversion of a binary number having a fractional part to its decimal equivalent to three places of decimal using single system optical tree architecture”, J.Opt., Vol.43, Issue.2, pp.122-129, 2014.
[15] Y. Liu, F. Qin, F. Zhou, Q-b. Meng, D-z. Zhang, Z-y. Li, “Ultrafast optical switching in Kerr nonlinear photonic crystals”, Front. Phys. China., Vol.5, Issue.3, pp.220-244, 2010. doi: 10. 1007/s11467-010-0100-0
[16] Z-Y. Li, Z-M. Meng, “Polystyrene Kerr nonlinear photonic crystals for building ultrafast optical switching and logic devices”, J. Mater. Chem., C Vol.2, Issue.5, pp. 773-954, 2014.