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The Growth of Organic Single Crystals in Glass Capillaries for Second Harmonic Generation

Published online by Cambridge University Press:  21 February 2011

Geoffrey E. Holdcroft ,
P. L. Dunn  and
J. D. Rush
Geoffrey E. Holdcroft
Affiliation:
British Telecom Research Laboratories, Martlesham Heath, Ipswich, Suffolk, IP5 7RE, UK.
P. L. Dunn
Affiliation:
British Telecom Research Laboratories, Martlesham Heath, Ipswich, Suffolk, IP5 7RE, UK.
J. D. Rush
Affiliation:
British Telecom Research Laboratories, Martlesham Heath, Ipswich, Suffolk, IP5 7RE, UK.
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Abstract

The growth and characterisation of a number of organic single crystals, e.g. benzil, 2–methyl–4– nitroaniline and 2–N,N–dimethylamino–5–nitroacetanilide, in silica capillary has become fairly well established over recent years. [1–6 ] However the growth of these same compounds in glass capillary with a much higher refractive index than silica has received little interest. Crystal cored fibres, ccf's, in which there is a close match of the refractive index of the cladding to that of the core allows the possibility of fabricating single mode waveguides with useful dimensions for crystal growth. There is a better overlap integral between phase matched fundamental and second harmonic modes in a low moded structure than in a structure with more allowable modes and thus a rise in the conversion efficiency can be expected if the correct dimensions of waveguide are chosen. If a ccf of high conversion efficiency, 10% at 0.1 mW average power, could be made then the promise of fabricating an organic optical nonlinear device, e.g. parametric amplifier, might be realised. In this paper we will describe how the growth method adopted for silica clad organic crystals has been adapted for their growth in a range of Schott glasses which are better matched in refractive index, RI, than silica to the organic material. The linear and nonlinear optical properties of these crystal cored fibres will be given in terms of; the orientation of the crystal axes with respect to the fibre direction; the sideways scattering characteristics from defects; the throughput of the fundamental beam; the polarisation states of both the fundamental and the second harmonic outputs; and the overall efficiency of second harmonic generation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 152: Symposium H – Optical Materials: Processing and Science , 1989 , 57
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1. White, K.I. and Nayar, B.K., ”Nonlinearity effects in crystal cored fibres” Proc. SPIE 864, 162–168 (1987) and references therein.CrossRefGoogle Scholar
2. Tomaru, S. and Zembutsu, S., ”Organic crystal growth in glass capillaries” Preprints 2nd SPSJ Int. Polymer Conf. Japan 2(12), 145 (1986).Google Scholar
3. Holdcroft, G.E., Nayar, B.K., O'Brien, D., Rush, J.D., Halliwell, M.A.G., Kashyap, R. and White, K.I., ”Preparation and characterisation of organic crystal cored fibre devices” Proc. Conf. Lasers and Electro-Optics 14, 222–223 (1987).Google Scholar
4. Holdcroft, G.E., Dunn, P.L., Rush, J.D. and Halliwell, M.A.G., ‘The growth of 2-(N,N-dimethylamino)-5-nitroacetanilide in glass capillaries and its nonlinear optical properties” Proc. Conf. Lasers and Electro-Optics 7, Paper WM55 (1988).Google Scholar
5. Kerkoc, P., Bossard, Ch., Arend, H. and Gunter, P., ”4-(N,N-dimethylamino)-3-acetamidonitrobenzene single-crystal cored fibers for nonlinear optical uses” Proc. Conf. Lasers and Electro-Optics 7, Paper WM39 (1988).Google Scholar
6. Holdcroft, G.E., Dunn, P.L. and Rush, J.D., ”Second harmonic generation in DAN crystal cored fibres” J. Chem. Soc. Proc. Organic Materials for Non-Linear Optics” in press, (1988).Google Scholar
7. Ainsworth, D.P. and Suschitzky, H., ”Preparative routes to t-amine substituted nitroanilines” J. Chem. Soc., 111–113 (1966).CrossRefGoogle Scholar
8. Private communication from Sherwood, J.N., University of Strathclyde.Google Scholar
9. Baumert, J. –C., Twieg, R.J., Bjorkland, G.C., Logan, J.A. and Dirk, C.W., ”Crystal growth and characterisation of 4–(N,N-dimethylamino)–3–acetamidonitrobenzene, a new organic for nonlinear optics” Appl. Phys. Lett. 51(19), 1484–1486 (1987).CrossRefGoogle Scholar
10. Norman, P.A., Bloor, D., Obhi, J.S., Karaulov, S.A., Hursthouse, M.B., Kolinsky, P.V., Jones, R.J. and Hall, S.R., ”Efficiency second–harmonic in single crystals of 2–(N,N-dimethylamino)–5–nitroacetanilide” J. Opt. Soc. Am. B 4(6), 1013–1016 (1987).CrossRefGoogle Scholar
11. Kolinsky, P.V., Chad, R.J., Jones, R.J., Hall, S.R., Norman, P.A., Bloor, D. and Ohbi, J.S., ”Secondharmonic generation in single crystals of 2–NN–dimethylamino)–5–nitroacetanilide (DAN) at 1.3 ¼m” Electronics Lett. 23(15), 791–792 (1987)Google Scholar