Radially polarized, actively Q-switched, and end-pumped Nd:YAG laser

Abstract

In this paper, we demonstrated an actively Q-switched, radially polarized, and laser-diode end-pumped Nd:YAG laser with an acousto-optic modulator as the Q switch and a photonic crystal grating as the output coupler. The laser generated pulses of 26.4-67.2 ns duration, and the repetition rate can be continuously adjusted from 500 Hz to 9.238 kHz with peak power up to 7.75 kW. Such a radially polarized pulse would facilitate numerous applications.

Azimuthally polarized, passively Q-switched Yb-doped fiber laser

“…In such laser, the route to pulsed operation usually mentions the utilization of Q-switched or modelocked techniques, while the vectorized oscillation involves the introduction of an axis-symmetrical polarization selector [8][9][10][11][12][13] or thermally induced birefringence [4,14,15] into the resonator. Compared with solid-state laser sources, the rare-earth doped fiber laser has been paid much attention owing to its capacities for power scaling, thermal dissipation and modal confinement.…”

“…Previously, the pulsed and CV beam was mainly generated from the solid-state laser [4,[8][9][10][11][12][13][14][15]. In such laser, the route to pulsed operation usually mentions the utilization of Q-switched or modelocked techniques, while the vectorized oscillation involves the introduction of an axis-symmetrical polarization selector [8][9][10][11][12][13] or thermally induced birefringence [4,14,15] into the resonator.…”

Effect of thermally induced birefringence on high power picosecond azimuthal polarization Nd:YAG laser system

“…In general, an azimuthally polarized beam has been obtained in a laser cavity or extra-cavity. [8][9][10][11][12] In the experiment, azimuthally polarized radiation was converted via an extracavity polarization converter. Interestingly, the seed beam used in this work is a pulse burst picosecond azimuthally polarized beam.…”

Pulsed azimuthally polarized beam from passively Q-switched rotating Nd:YAG disk laser

“…The pulsed operation of vector polarization has been implemented previously by D. Pohl in a passively Q-switched ruby laser. 14) Recently, the azimuthal or radial polarization pulse was generated mainly from solid-state lasers by utilizing active or passive Q-switching, [15][16][17][18][19] or mode locking. [20][21][22] However, for a laser resonator working the thermal lens effect in bulk gain material restricts the extraction of stored energy.…”