The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres. | MINISTRY OF EDUCATION VIETNAM ACADEMY AND TRAINING OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY ----------------------------------- Nguyen Van An INVESTIGATION OF LASING EMISSION EFFECT AND OPTICAL AMPLIFICATION IN THE CAVITY CONJUNCTED WITH 1D 2D PHOTONIC CRYSTAL STRUCTURES Major Materials for Optics Optoelectronics and Photonics Code 9 44 01 27 SUMMARY OF SCIENCE MATERIALS DOCTORAL THESIS Hanoi 2020 The thesis was completed at Graduate University of Science and Technology - Vietnam Academy of Science and Technology. Supervisor 1 Assoc. Prof. Dr. Ngo Quang Minh Supervisor 2 Assoc. Prof. Dr. Pham Van Hoi Reviewer 1 Reviewer 2 Reviewer 3 . The thesis will be defended at Graduate University of Science and Technology - Vietnam Academy of Science and Technology at . 202 . The thesis could be found at - Library of Graduate University of Science and Technology - National Library of Vietnam 1 INTRODUCTION 1. The urgency of the thesis The transmission of electromagnetic waves inside 1D-PhC was first studied by Lord Rayleigh in 1887. In 1987 the research works about 3D-PhC related to effect of the random emission prohibition in PhC due to existence of PBG was published and proposed by E. Yablonovitch and S. John 1 2 . From that PhC has attracted the special attention of the researchers in the field of using the new structures based on PhC to conduct transmit and control electromagnetic waves as well as use electromagnetic waves to information processing. The 2D-PhC controlled waveguide properties convergence on 2D surface and 1D-PhC fibers for single mode lasers with high output power weve proposed by Birks in 1997 3 . Until 1999 after O. Painter s team succeeded in fabricating 2D- PhC lasers with directional feedback distribution effects in the 2D- PhC lattice structure 4 lasers based on photonic materials have been promoted in research in photonic laboratories around the world. The PhC s cavities with different quasiperiodic lattices have been .
