Thermal lens measurements in a Nd:GdVO4 self-Raman laser

Thermal lens effects in the LD end-pump fundamental and self-Raman crystal laser

“…The thermal focal length of self-Raman crystal laser could be calculated by � == _ 1 +_ 1 (8) f fR h Combining the (6), (7) and (8), the expression for the thermal focal length of self-Raman laser is f = �[p,; ( As l -1) + 7J a p;n f exp( -a z) 2 dZ ] -1 (9) dn/d T OJ sI AL o (OJ o + 8p!z-zo! )…”

“…Reference [2][3][4] published theories that modeled the thermal lens in solid-state lasers. Reference [5][6][7][8] measured the focal length of the thermal lens using several methods. In 2002, a method for measure the thermal focal length was reported by song et al based on the cavity stability method [9].…”

Compact Q-switched and mode-locked Nd3+:YVO4/Cr4+:YAG self-Raman laser

“…These systems are simple and versatile, and by choosing different laser and Raman crystals, a range of output wavelengths can be obtained for potential applications in the areas of medicine, biomedicine, and remote sensing. Systems which are particularly useful are self-Raman compact lasers based on Nd-doped laser crystals that provide the first Stokes line in the near infrared region between 1100 and 1200 nm [1][2][3][4][5][6][7]. Combined with frequency doubling, these laser sources generate radiation at wavelengths in the yellow-orange spectral region.…”

“…Diode-pumped, Q-switched self-Raman lasers have been successfully demonstrated in earlier works [6][7][8][9][10]. However, for the time resolved investigation of fast physical phenomena, often the nanosecond or subnanosecond pulses of Q-switched lasers is not sufficient.…”

Interferometria speckle com lasers de diodo multimodo para análise de materiais e dispositivos

“…Nela podemos observar a análise semi-quantitativa (uma vez que foi estipulado o valor de ) realizada em nosso estudo do efeito de lente térmica. O perfil apresentando nos resultados possui o mesmo comportamento, já descrito em na literatura para materiais com condutividade térmica positiva[4,9], que mostra uma relação inversamente proporcional do comprimento focal com aumento da potência de bombeio.No gráfico, o ponto a 738 mW foi retirado do ajuste linear uma vez que este foge da relação do comprimento focal e potência de bombeio. O motivo para esta não-linearidade dos pontos deve-se ao fato de termos ultrapassado o limiar de ruptura da amostra, gerando trincas.…”