Spectral and generation characteristics of YAG:Nd³⁺ crystals with high concentration of Nd³⁺ ions

• Autorzy: Mierczyk Z. , Kopczyński K. , Żendzian W. , Łukasiewicz T.
• Języki publikacji: EN

Abstrakty

EN

The paper presents investigation results of optical, spectroscopic, and generation parameters of YAG:Nd³⁺ with higher concentration of Nd³⁺ ions (1.1–1.8 at. % Nd³⁺). YAG:Nd³⁺ single crystals were obtained by the Czochralski method. Investigations on optical quality were carried out using elastoscopic and interferometric methods. Absorption spectra within the spectral range of 200–3000 nm (∆ʎ = 1 nm) and pumping range of 750-850 nm (∆ʎ = 0.1 nm) were determined. Also the spectra of luminescence induced with radiation emitted by a laser diode of 808 nm were investigated and lifetime of Nd³⁺ ions in the upper laser level (⁴F₂/₃) was determined. In the all investigated crystals, doped up to 1.3 at.% Nd³⁺, the time of fluorescence decay from ⁴F₂/₃ level is 230 us. It was stated that high level of Nd³⁺ ions doping (above 1.33 at. % Nd³⁺) causes reduction of lifetime of the upper level ⁴F₂/₃ as a result of concentric quenching of luminescence. For the crystals of 1.8 at. % Nd³⁺ concentration, upper laser level lifetime has been educed to 183 us. Also the results of generation investigations obtained in a laser system with the examined YAG:Nd active media in form of side pumped "slabs" and inform of longitudinally pumped rod.

Słowa kluczowe

EN

crystal growth; YAG : Nd3+; diode pumped solid state lasers; microlasers; giant-pulse lasers

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2001
• Tom: Vol. 9, No. 1
• Strony: 83--90
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Mierczyk Z.

autor

Kopczyński K.

autor

Żendzian W.

autor

Łukasiewicz T.

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