Nonlinear dynamics in thin-slice Nd:YAG ceramic lasers: Coupled local-mode laser model

Abstract

The authors propose a coupled spatially distributed local-mode laser model for understanding self-induced high-speed modulations in Nd:YAG ceramic lasers with laser-diode end pumping, which critically depend on pump positions. In addition to complicated high-speed modulations, quasiperiodic and chaotic relaxation oscillations have been demonstrated experimentally and reproduced by numerical simulation of the model of coupled local-mode lasers. Q-switching-like periodic spiking pulsations have been also observed and reproduced numerically by assuming saturable absorber type of inclusions in grain boundaries.

Transparent Ceramics

“…Transient liquid phase (TLP) sintering of CaF 2 additive on the densification behaviors and microstructural development of AlN ceramics are investigated [295]. It is found that 1 wt% CaF 2 can effectively promote densification process.…”

Effect of Grain Size on Modal Structure and Polarization Properties of Laser-Diode-Pumped Miniature Ceramic Lasers

“…It thus appears that the lasing transverse mode should be split into local modes having different frequencies, exhibiting dynamic instabilities. 4,5) In the case of laser B, on the other hand, linearly polarized oscillations were obtained in a single TEM 00 transverse mode, as shown in Fig. 2(b).…”

Polarization Properties of Laser-Diode-Pumped Microchip Nd:YAG Ceramic Lasers

“…In this section, our experimental results concerning lasing pattern formations due to grain boundaries and the resultant dynamic instabilities observed in Nd:YAG ceramic lasers (Kawai et al, 2004;Narita et al, 2005;Otsuka et al, 2006) are reviewed.…”