PC 31

TRANSPARENT NONLINEAR OPTICAL POLYMERS FOR EFFECTIVE WAVELENGTH CONVERSIONS IN OPTICAL FIBER COMMUNICATIONS

S.K. Parka, M.-su Kima, J.J. Jua, S. Parka, J.T. Kima, M.-H. Leeb

aIT Convergence & Components Laboratory, Electronics and Telecommunications Research Institute, 161 Gajeong-dong, Yuseong-gu, Daejeon 305-700, South Korea (skpark@etri.re.kr)

bSchool of Information and Communication Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do 440-746, South Korea (mhlee@skku.edu)

We tried to develop nonlinear optical (NLO) polymes for all-optical wavelength converters. 2-(Methyl-{4-[(6-nitro-benzenothiazol -2-ylimino)-methyl]- phenyl}-amino)-ethanol was used as a chromophore. 2,3,4,5,6-Pentafluorostyrene was introduced into the chromophore for preparing an acrylic monomer containing the chromophore. We successfully obtained the NLO copolymers from 4-{methyl-[2-(2,3,5,6-tetrafluoro-4-vinyl-phenoxy)-ethyl]-amino}-benzylidene)-(6-nitro-benzothiazol-2-yl)-amine, 1-pentafluorophenyl-pyrrole- 2,5-dione, and 2,2,2-trifluoroethyl acrylate. These copolymers show not only low losses at wavelengths of a pumping beam and a second harmonic (SH) beam, but also a high second-order nonlinear optical coefficient (d33) at the wavelength of the pumping beam. The NLO copolymer film is prepared well, and its d33 is as high as around 22 pm/V at a wavelength of 1.55 mm. The refractive indexes of the copolymer films for TE- and TM-polarized lights at the wavelength of 1.55 mm were 1.5491 and 1.5471, respectively. The details of the optical properties of the NLO polymer materials will be discussed with consideration of their real applications to polymer wavelength converters.