Polymer waveguides for second-order nonlinear-optical effects at telecommunication wavelengths

Pliska, T.; Cho, Wook-Rae; Ricci, Vincent; Meier, Joachim; Duff, Anne-Claire Le; Canva, Michael; Stegeman, George I.; Ray, Paul S.

doi:10.1364/otf.1999.fb2

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“…Whereas both DANS and DR1 are well known for their large hyperpolarizability, 26 the use of the DANB chromophore in the present study was driven by the wellestablished high transparency in the visible and in the near infrared of single benzene ring systems such as ni-troanilines and related compounds. Waveguiding structures for second-harmonic generation at 1.55 m have been proposed for all three materials; 12,[27][28][29] however, all devices were far from being optimized. We have thus performed this study to assess their potential further.…”

Section: Methodsmentioning

confidence: 99%

Comparative study of nonlinear-optical polymers for guided-wave second-harmonic generation at telecommunication wavelengths

Pliska¹,

Cho

Meier

et al. 2000

J. Opt. Soc. Am. B

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We report on the linear and nonlinear-optical properties of 4-dimethylamino-4Ј-nitrostilbene (DANS), 4-diethylamino-1-nitrobenzyl (DANB), and 4-͓N-ethyl-N-(2-hydroxyethyl)͔amino-4Ј-nitroazobenzene) (Disperse Red 1;DR1) side chain polymers whose second-harmonic generation at the telecommunication wavelength of 1.55 m was investigated. Measured ultraviolet-visible-near-infrared spectra were analyzed with an inhomogeneously broadened line-shape model, in particular, in the long-wavelength tail of the electronic transitions, which determines the absorption loss at the second-harmonic wavelength. The nonlinear-optical coefficients were measured at different poling temperatures and poling fields by the Maker fringe technique. On the basis of the measured material parameters we calculated the normalized conversion efficiencies for guided-wave second-harmonic generation at 1.55 m. The DR1 polymer exhibited the best nonlinearityabsorption trade-off, with a calculated normalized conversion efficiency of several hundred percent per watt, whereas the figures of merit for DANS and DANB are lower and comparable with each other.

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