Self-Q-switched, orthogonally polarized, dual-wavelength laser using long-lifetime Yb³âº crystal as both gain medium and saturable absorber.
Opt Express
; 22(6): 6577-85, 2014 Mar 24.
Article
em En
| MEDLINE
| ID: mdl-24664006
A novel self-Q-switched and orthogonally polarized dual-wavelength laser has been investigated with Yb³âº-doped CGB disordered crystals. By slightly inclining output coupler to introduce the Fresnel loss, we realized simultaneously dual-wavelength laser operation at 1052.6 nm in E//b polarization and 1057.7 nm in E//c polarization with a frequency difference of 1.38 THz. Self-Q-switched pulse generation was observed in this free-running laser, originating from the nonlinear reabsorption effect of Yb:CGB as well as the strong storage of inversion population induced by the long excited-state lifetime (~1 ms). Pulse duration of 287 ns was obtained with an output average power of 416 mW and a repetition rate of 35 kHz. The self-Q-switching effect increased the peak power by 100 times the average power. This very simple laser, free from the complexity and high-cost of additional intracavity polarization modulator and Q-switcher, may be applied for constructing miniature, integrated and portable laser system.
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MEDLINE
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article