Several methods for investigating the thickness uniformity of polymer thin films are presented as well as their measurement principles. A comparison of these experimental methods is given.The cylindrical lightwave ref...Several methods for investigating the thickness uniformity of polymer thin films are presented as well as their measurement principles. A comparison of these experimental methods is given.The cylindrical lightwave reflection method is found to can obtain the thickness distribution along a certain direction.It is a simple and suitable method to evaluate the film thickness uniformity.展开更多
A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before an...A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before and after corona poling. And the loss is determined to be 1.84 dB/cm and 2.14 dB/cm, respectively.展开更多
Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating...Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating prism Q-switched ruby laser with a CdS sample in its cavity. As predicted by the theory,the output intensity and output energy both are decreased and pulse length is increased as compared with the normal Q-switched case.展开更多
文摘Several methods for investigating the thickness uniformity of polymer thin films are presented as well as their measurement principles. A comparison of these experimental methods is given.The cylindrical lightwave reflection method is found to can obtain the thickness distribution along a certain direction.It is a simple and suitable method to evaluate the film thickness uniformity.
文摘A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before and after corona poling. And the loss is determined to be 1.84 dB/cm and 2.14 dB/cm, respectively.
文摘Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating prism Q-switched ruby laser with a CdS sample in its cavity. As predicted by the theory,the output intensity and output energy both are decreased and pulse length is increased as compared with the normal Q-switched case.
