Diode-pumped single-frequency-Nd:YGG-MOPA for water-vapor DIAL measurements: design, setup and performance

作者：Loehring J^*; Meissner A; Hoffmann D; Fix A; Ehret G; Alpers M

来源：Applied Physics B: Lasers and Optics , 2011, 102(4): 917-935.

DOI：10.1007/s00340-010-4314-1

A diode-pumped Q-switched and injection-seeded single-frequency laser, generating tunable laser radiation at 935 nm, is presented. Using Nd:YGG (Y(3)Ga(5)O(12)) as the active medium, the laser that was developed to serve as a transmitter for water-vapor lidar measurements. The configuration consists of a stable resonator in rod geometry that is injection seeded by a narrowband diode laser and stabilized by the ramp-and-fire technique. Energy scaling was done in a power amplifier in slab geometry. Both oscillator and amplifier crystal were diode pumped at 806 nm. More than 30 mJ pulse energy at 100 Hz repetition rate with a beam propagation factor of M(2)< 1.4 and pulse duration of 52 ns in single-frequency mode were generated. To our knowledge this is the first direct generation of 935 nm Q-switched pulses from Nd:YGG suitable for water-vapor measurements. The reported results show great promise of this laser in applications where high efficiency and reduced complexity is indispensable, such as for spaceborne or airborne water-vapor lidar instruments.

• 出版日期2011-3