High repetition rate, V³⁺:YAG crystal Q-switched diode pumped Nd lasers

• Autorzy: Jabczyński, J. K. , Mierczyk, Z. , Żendzian, W. , Kopczyński, K. , Frukacz, Z.
• Języki publikacji: EN

Abstrakty

EN

The high repetition rate passively Q-switched neodymium host lasers operating at 1 mm wavelenght pumped by a 10-W fibre-coupled diode laser are presented. As a passive q-switch the V³⁺:YAG crystal was applied. The V³⁺:YAG parameters were determined in spectroscopic and saturable transmission experiments. A numerical model taking into account short recovery time of V³⁺:YAG ~ 5 ns and excited state absorption was used to analyse such a laser. The thermal lensing magnitude and performance were determined in free running experiments for two Nd:YAG rods of different quality and Nd:YLF crystal. The smooth Q-switched pulses with repetition rates of 40-200 kHz were abtained in short linear cavities of a length less than 11cm. The highest average power of 1.4 W with slope efficiency of 20% was demonstrated in Nd:YAG laser. Long pulse durations of hundreds ns and low pulse energy of a few mJ (up to 24 in the best case) were caused by low value of the ratio of the absorption cross section of V³⁺:YAG to emission cross section of Nd:YAG. The much higher pulse energy of 70 µJ with pulse duration of 80 ns was abtained in lower gain Nd:YLF laser in a cavity of 140 mm length with internal lens 50 mm focal length.

Słowa kluczowe

EN

diode pumped lasers; passive Q-switching

• Czasopismo: Opto-Electronics Review
• Rocznik: 2001
• Tom: Vol. 9, No. 1
• Strony: 57-66
• Opis fizyczny: Bibliogr. 32 poz.

Twórcy

autor

Jabczyński, J. K.

autor

Mierczyk, Z.

autor

Żendzian, W.

autor

Kopczyński, K.

autor

Frukacz, Z.

• Institute of Optoelectronics, Military University of Technology, 2 Kaliski Str., 00-908 Warsaw, Poland,