Texto completo de evento
Quasi-three level Nd:YLF fundamental and Raman laser operating under 872-nm and 880-nm direct diode pumping
Registro en:
10.1117/12.2290444
Autor
WETTER, NIKLAUS U.
BERECZKI, ALLAN
PAES, JOAO P.F.
SOLID STATE LASERS XXVII: TECHNOLOGY AND DEVICES
Resumen
Nd:YLiF4 is the gain material of choice whenever outstanding beam quality or a birefringent gain material is necessary such as in certain applications for terahertz radiation or dual-frequency mode-locking. However, for high power CW applications the material is hampered by a low thermal fracture threshold. This problem can be mitigated by special 2D pump set-ups or by keeping the quantum defect to a minimum. Direct pumping into the upper laser level of Nd:YLiF4 is usually performed at 880 nm. For quasi-three level laser emission at 908 nm, direct pumping at this wavelength provides a high quantum defect of 0.97, which allows for very high CW pump powers. Although the direct pumping transition to the upper laser state at 872 nm has a slightly smaller quantum defect of 0.96, its pump absorption cross section along the c-axis is 50% higher than at 880 nm, leading to a higher absorption efficiency. In this work we explore, for the first time to our knowledge, 908 nm lasing under 872 nm diode pumping and compare the results with 880 nm pumping for quasicw and cw operation. By inserting a KGW crystal in the cavity, Raman lines at 990 nm and 972 nm were obtained for the first time from a directly pumped 908 nm Nd:YLF fundamental laser for both quasi-cw and cw conditions. Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq) Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) CNPq: 401580/2012 FAPESP: 12/11437-8
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Application of pulsed laser ND: YAG in superduplex steel uns S 32750: Autogenous laser welding, laser welding with refusion process by laser and hybrid welding (laser/Gtaw)
Universidade Estadual Paulista (Unesp); and Technology of Mato Grosso (2020-01-01)The families of duplex and superduplex steels were developed to serve sectors that demand steels with extreme mechanical capacity and good corrosion resistance. Such characteristics are due to their structure being composed ... -
Efectos producidos por diferentes tipos de láser en córnea de cobayos: identificación de un láser capaz de provocar lesiones superficiales sin dejar cicatrices
Suarez, Alicia Carmen; Suarez, Maria Fernanda; Crim, N.; Monti, R.; Urrets-Zavalía, J. A.; Serra, H. M. (Elsevier Science, 2015-10)To evaluate the effects of four different types of lasers with different power and exposure time conditions in the cornea of normal guinea pigs. To determine which laser and conditions only damage the epithelium and ...