Diode lasers: From laboratory to industry

Pre-sowing seed magnetic field stimulation: A good option to enhance bitter gourd germination, seedling growth and yield characteristics

“…LIBS atomizes only the small portion of the sample by the focused laser pulse, which makes a tiny spark on the sample. Because of the short-life of the spark emission, capturing the instant light is a major skill to collect sufficient intensity of the emitting species (Nasim and Jamil, 2014). The Nd:YAG laser with an ability of delivering 200 mJ at 1064 nm wavelength was used and the responses thus obtained are shown in Fig.…”

Longitudinal modes evolution of a GaN-based blue laser diode

“…As the cavity length is significantly longer than the resonating light wavelength, cavity resonances corresponding to maximum gain can occur at multiple wavelengths; a phenomenon known as "mode hopping". Among few types of laser diodes, it is well-established that GaN-based laser diodes are efficient, economic and versatile sources of laser radiation with output wavelength that covers a wide spectral range from the near ultraviolet to the visible green [1][2][3][4][5]. In 1996, Nakamura and co-workers [1,2] introduced the first demonstration of a room-temperature nitride-based CW blue laser.…”

Bioestimulación láser en semillas y plantas

“…A partir de la llegada de los láseres en los años 60´s (Nasim & Jamil 2014), se inició su aplicación en sistemas biológicos (Bessis et al 1962), incursionando al sector agrícola como elemento bioestimulador (BE) de plantas y semillas con el láser de rubí (Wilde et al 1969), y posterior a su descubrimiento también han sido aplicados los láseres de He-Ne (Helio-Neón), Ar (Argón), Neodimio-YAG (Nd-YAG), dióxido de carbono (CO 2 ) y diodos (en distintas longitudes de onda -λ), (Paleg & Aspinall 1977, Govil et al 1985,1991, Koper et al 1996, Rong et al 2001, Chen & Wang 2004, Chen & Sun 2006, Qiu et al 2008a, Chen 2008, Aladjadjiyan 2007a, 2007b, Śliwka & Jakubiak 2009, Hernández-Aguilar et al 2005, 2007a, 2007b, 2011, Behzadi et al 2012, lo cual permite conjeturar el uso de la tecnología láser para tratamiento presiembra o durante algunas de las etapas fenológicas de los cultivos.…”