Several continuous-wave Nd:YVO(4) self-Raman lasers based on the primary and secondary Raman transitions of YVO(4) (893cm(-1) and 379cm(-1) respectively) are reported in this paper. Laser outputs were obtained at a wavelength of 1109nm, 1158nm and 1231nm with maximum output powers of 1.0W, 700mW and 540mW respectively. The respective absorbed pump power to Raman output power conversion efficiencies were measured at 8.4%, 5.4%, and 5.4%.
Active control of the spectral and temporal output characteristics of solid-state lasers through use of MEMS scanning micromirrors is presented. A side-pumped Nd:YAG laser with two intracavity scanning micromirrors, enabling Qswitching operation with controllable pulse duration and pulse-on-demand capabilities, is investigated. Changing the actuation signal of one micromirror allows a variation of the pulse duration between 370 ns and 1.06 µs at a pulse repetition frequency of 21.37 kHz and average output power of 50 mW. Pulse-on-demand lasing is enabled through actuation of the second micromirror. To our knowledge this is the first demonstration of the use of multiple intracavity MEMS devices as active tuning elements in a single solid-state laser cavity. Furthermore, we present the first demonstration of control over the output wavelength of a solid-state laser using a micromirror and a prism in an intracavity Littman configuration. A static tilt actuation of the micromirror resulted in tuning the output wavelength of an Yb:KGW laser from 1024 nm to 1031.5 nm, with FWHM bandwidths between 0.2 nm and 0.4 nm. These proof-ofprinciple demonstrations provide the first steps towards a miniaturized, flexible solid-state laser system with potential defense and industrial applications.
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