Nonlinear optics basic principles

We have described for a number of molecular single crystals the basic principles and techniques which were involved in the optimization of their nonlinear efficiency and crystalline quality. Certainly, other types of molecules or material processing techniques can be used. In particular, it could be worthwile to try and by-pass the difficulty of growing large single crystals for applications which are less demanding in terms of optical quality parametric oscillation. 

Although the basic principle dates back to the early days of nonlinear optics [59], it was only implemented three decades later with chromophores oriented by an electric field in solution [60, 61]. The chromophore was Foron Brilliant... 

Demtrdder W 1996 Laser Spectroscopy Basic Concepts and Instrumentation 2nd edn (Beriin Springer) Levenson M D and Kano S S 1988 Introduction to Nonlinear Laser Spectroscopy Boston, MA Academic) Mukamei S 1995 Principles of Nonlinear Optical Spectroscopy Oxford Oxford University Press)... 

The reflectivity and width of the band gaps increase as the refractive index modulation increases. The basic principle for optical limiting by a ID nonlinear photonic crystal material can be understood from Figure 2. Initially, (A), the refractive indices of the different layers are matched, and the sample... 

In interferometric autocorrelation the coherent superposition of the two collinear partial beams is realized. The basic principle is shown in Fig. 6.65. The incoming laser pulse is split by the beamsplitter BSl into two parts, which travel through two different pathlengths and are then collinearly superimposed at BS2. When they are focused by the lens L into a nonlinear optical crystal, the output signal (6.39) is generated at 2co. Instead of the delay line arrangement in Fig. 6.65 a Michelson interferometer in Fig. 6.70 can also be used. The second harmonics are detected by a photomultiplier, while the fundamental wavelength is rejected by a filter. 

Second-harmonic generation for nonlinear optics, ferroelectricity, and piezoelectricity are all properties that are dependent on the pre.sence, magnitude, and orientation of bulk polarity in crystals and films. Therefore, the issue of how to design a polar solid from basic principles remains a challenge that has immense potential relevance to materials science. Obviously, a polar solid is guaranteed if a pure enantiomer is used as a component of a compound. However, the presence of polarity does not in any way imply that optimal packing will occur and, further-... 

Chapter 2 focuses on an important property of macromolecules, i.e., nonlinear optical (NLO) behaviour, with promising applications in development of faster and highly performing communication devices such as computers and fiber optic telecommunications. An introduction to the basic physical principles that undergo... 

Grigoryants AG (1994) Basics of laser material processing. CRC, New York Shen YR (1984) The principles of nonlinear optics. Wiley, New York Boyd RW (1992) Nonlinear optics. Academic, San Diego... 

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