Th.--Sci. phys.--Lille 1, 1979. N°: 441.

Orientador: Gilberto de Matos Gualberto / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin / Made available in DSpace on 2018-07-14T11:55:00Z (GMT). No. of bitstreams: 1 Bernussi_AyrtonAndre_M.pdf: 1100583 bytes, checksum: 06bc809fdf73634611024100f00dd036 (MD5) Previous issue date: 1984 / Resumo: Não informado / Abstract: Not informed. / Mestrado / Física / Mestre em Física

Orientador : Oswaldo Luiz Alves / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica / Made available in DSpace on 2018-07-14T15:44:11Z (GMT). No. of bitstreams: 1 Cezario_MarcosAntonioTorres_M.pdf: 4840527 bytes, checksum: ae6f166c4041c5e2e1d81654be09a1c6 (MD5) Previous issue date: 1987 / Mestrado

Orientador : Chhiu-Tsu Lin / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica / Made available in DSpace on 2018-07-17T12:55:52Z (GMT). No. of bitstreams: 1 Caetano_CarlosAlberto_M.pdf: 7395777 bytes, checksum: 53ba37739cbb022fc64a5157969fb967 (MD5) Previous issue date: 1981 / Mestrado

Diss. Upps. phil. / -IVb-

Two nonlinear optical experiments are presented in which the third-order electronic susceptibility of molecules is used to generate Raman signals. The first one uses a single 532 nm beam from a Nd:YAG laser to produce Stimulated Raman Scattering in benzene and deuterated benzene. With a simple experimental set-up, stimulated emission involving CC and CH (CD) stretching modes from both C���H��� and C���D��� can be visually witnessed. Collinear and conical stimulated Raman beams are observed and explained. Measuring the wavelengths of the coherent beams with a meter stick and a grating permits the calculation of CC and CH force constants in benzene. This experiment has been developed as a lab in graduate and undergraduate courses and has been submitted to J. Chem. Ed. for publication. The second experiment uses a high resolution Coherent Anti-Stokes spectrometer to investigate the v��� vibrational mode of the CD��� radical produced by photolysis of CD���I. Calibrated spectra are obtained at much higher resolution than in an earlier published study and efforts are described to improve the range of data and to reconcile differences between the spectra. Modeling of the spectra leads to a "best fit" set of vibration-rotation parameters for CD��� but a completely satisfactory fit of both high and low resolution spectra was not achieved. / Graduation date: 2003

Graduation date 1997

In this thesis, we investigate the design and amplification characteristics of discrete fiber Raman amplifier (FRA), and discuss with amplification characteristics of FRA by employing multi-pumping-wavelength configuration. Recently, because of the invention of high output power of pump laser diodes, so discrete FRA can be practically employed in optical fiber communication system. The fiber Raman amplifier has two merits. One is the low noise characteristic and the other is the arbitrary spectral gain band, so it will play an important role in optical communication system. In this study, we employ backward pumping configurations in the experiment and simulation of discrete FRA. By comparing with results of experiment and simulation, we prove that the simulation results quite agree with the experimental data of four pumping wavelengths configuration, we have successfully designed an L-band gain flattened discrete FRA by using four pumping wavelengths configuration. The experimental results showed that the amplifier, for the input of seven optical channel each with ¡V16 dBm input power level, has an optical gain of >10 dB of each channel with good gain uniformity (<1 dB) in the 1565-1595 nm wavelength region.

No description available.

No description available.