Performance Of Diode-pumped Nd Research Articles

Efficient continuous-wave and passively Q-switched lasers based on disordered Nd:Ca0.7La0.3Al12O19 crystals

A new neodymium-doped (Nd3+-doped) Ca0.7La0.3Al12O19 (Nd:CLA) disordered crystal was successfully grown by the Czochralski method. The performance of diode-pumped Nd:CLA (a-cut and c-cut) lasers was demonstrated for the first time. For the c-cut crystal continuous-wave (CW) operation, we obtained the highest output power of 2.08 W at the wavelength of 1053.2 nm, and the slope efficiency was 23% versus the incident pump power. By inserting a Cr4+:YAG absorber, we successfully achieved a passively Q-switched laser, and the shortest pulse width was 18.36 ns with a peak power of 364.6 W. Compared with a-cut crystal, c-cut crystal has superior laser characteristics.

谐振腔失谐对二极管泵浦Nd:YAG激光器性能的影响

谐振腔失谐对二极管泵浦Nd:YAG激光器性能的影响

Laser performance of diode-pumped Nd, Y-codoped CaF 2–SrF 2 mixed crystal

A disordered Nd, Y-codoped CaF2–SrF2 mixed crystal was obtained by the temperature gradient technique (TGT). The absorption and fluorescence spectra of the crystal were measured at room temperature. Diode-pumped continuous-wave (CW) and Q-switched laser operations were demonstrated at 1056 nm with a 0.65 at.% Nd, 10 at.% Y-codoped crystal, for the first time to our knowledge. The CW output power of 724 mW was obtained in a compact linear cavity. Also the Q-switched pulse characteristics of Nd, Y:CaF2–SrF2 laser crystal were reported based on Cr4+:YAG saturable absorbers in a folded cavity. The shortest pulse width of 110 ns and the highest peak power of 383 W were obtained when the initial transmission of the Cr4+:YAG crystals was 90%. The dependence of the operational parameters on the pump power was also investigated experimentally.

Performance of diode-pumped <inline-formula><math display="inline" overflow="scroll"><msub><mi>Nd:Y</mi><mrow><mi>x</mi></mrow></msub><msub><mrow><mrow><mi>Gd</mi></mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>VO</mi><mrow><mn>4</mn></mrow></msub></math></inline-formula> laser

The laser properties of Nd:YxGd12xVO4 crystal are investi- gated. The continuous-wave (cw) laser performance of diode-pumped Nd:YxGd12xVO4 crystal operating at 1.06 mm and that intracavity second-harmonic generation (SHG) with a KTP crystal into the green spectral range at 532 nm are studied. Also the pulse characteristics of Nd:YxGd12xVO4 laser crystal are reported. A diode-pumped compact and efficient Cr 41 :YAG passively Q-switched Nd:YxGd12xVO4 laser formed by a simple flat-flat resonator is demonstrated. The dependence of the operational parameters on the pump power is also investigated experimentally. © 2004 Society of Photo-Optical Instrumentation Engineers.

Influence of neodymium concentration on the strength of thermal effects in continuous-wave diode-pumped Nd:YVO4 lasers at 1064 nm

The influence of neodymium ion concentration on the continuous-wave power performance of diode-pumped Nd:YVO4 lasers was experimentally investigated by using three crystals of approximately the same total absorption but different Nd concentrations of 0.5, 1, and 3 at.%. In situ measurements indicate that strong thermal lensing occurs in the highly doped sample (3 at.% Nd) and precludes scaling of the output power to large values. Results also show that undesirable thermal effects are dramatically reduced with decreasing active-ion concentration. The best power performance was obtained with a 10-mm-long Nd:YVO4 sample that had 0.5 at.% Nd. In this case, up to 6.5 W of continuous-wave output power was obtained at 1064 nm by using a 3% transmitting output coupler.

Performance of diode-pumped Nd:YAG and Nd:YLF lasers in a tightly folded resonator configuration

The performance of diode bar pumped Nd:YAG and Nd:YLF lasers in a novel tightly folded resonator configuration is described. For Nd:YLF at a pump level of 9.2 W a TEM/sub 00/ output power of 3.1 W with a slope efficiency of 47% was observed. In Q-switched operation a pulse energy of 0.7 mJ and a pulsewidth of 5 ns were obtained. The same resonator design configured to operate as an optical amplifier provides small-signal gain of 28 dB and average output powers of greater than 1 W. >