A self-excitation double pathway relaxation oscillation mechanism to deal with the seif-pulsing output of up conversion laser with rare-earth ions as the active material is raised.The reabsorption of the laser signal,...A self-excitation double pathway relaxation oscillation mechanism to deal with the seif-pulsing output of up conversion laser with rare-earth ions as the active material is raised.The reabsorption of the laser signal,which causes self-excitation of system and two-pathway transition of systepi,plays a role of adjusting Q,and causes the oscillation output of laser.A qualitative analysis to the appearance of self-pulsing output of rare-earth-doped laser is given.展开更多
The effects of electron-phonon interaction have to be taken into account for the physical process in a small system of condensed matters.The electron-phonon interaction in a I-D finite lattice system has been analyzed...The effects of electron-phonon interaction have to be taken into account for the physical process in a small system of condensed matters.The electron-phonon interaction in a I-D finite lattice system has been analyzed.The relation between the electron-phonon interaction and the symmetric properties of electronic states and phonons are considered,the transition probabilities are discussed.展开更多
文摘A self-excitation double pathway relaxation oscillation mechanism to deal with the seif-pulsing output of up conversion laser with rare-earth ions as the active material is raised.The reabsorption of the laser signal,which causes self-excitation of system and two-pathway transition of systepi,plays a role of adjusting Q,and causes the oscillation output of laser.A qualitative analysis to the appearance of self-pulsing output of rare-earth-doped laser is given.
文摘The effects of electron-phonon interaction have to be taken into account for the physical process in a small system of condensed matters.The electron-phonon interaction in a I-D finite lattice system has been analyzed.The relation between the electron-phonon interaction and the symmetric properties of electronic states and phonons are considered,the transition probabilities are discussed.