8 research outputs found
ΠΠΠΠΠ Π« ΠΠ ΠΠ ΠΠ‘Π’ΠΠΠΠΠ₯ Tm:KLu(WO4)2 ΠΈ Tm:KY(WO4 )2 Π ΠΠΠΠ ΠΠ§ΠΠ-ΠΠΠΠ€ΠΠΠ£Π ΠΠ¦ΠΠ ΠΠΠ― ΠΠΠ‘Π’ΠΠΠ¦ΠΠΠΠΠΠΠ ΠΠΠΠΠΠ ΠΠΠΠΠΠ― ΠΠ’ΠΠΠ‘Π€ΠΠ Π«
Diode-pumped solid-state lasers are attractive for a variety of practical applications in many fields of human activity due to their high efficiency, compactness, and long durability. For applications in remote sensing lasers emitting in the spectral range of about 2 microns are required. Materials doped with trivalent thulium ions are promising active media emitting in this spectral range. Potassium rare-earth tungstates are attractive materials among Tm-doped crystals due to their suitable characteristics, such as high values of absorption and stimulated emission cross sections, incignificant concentration quenching of luminescence, well-proven technology of the high quality crystals growth. The purpose of this paper was to compare lasing properties of lasers based on potassium lutetium and potassium yttrium tungstate crystals doped with thulium ions in continuous-wave regime. Experiments were carried out with a diode pumping in microchip cavity configuration. The maximum power of laser radiation at 1947 nm of 1010 mW was obtained with Tm:KY(WO4)2 crystal with the slope efficiency with respect to the absorbed pump power of 51 %. When Tm:KLu(WO4)2 crystal was utilized an output power of 910 mW at 1968 nm wavelength with the slope efficiency of 38 % was obtained. With Tm:KLu(WO4)2 laser a tuning range over 160 nm range was realized with a prism inserted into the laser cavity.Β Π’Π²Π΅ΡΠ΄ΠΎΡΠ΅Π»ΡΠ½ΡΠ΅ Π»Π°Π·Π΅ΡΡ Ρ Π΄ΠΈΠΎΠ΄Π½ΠΎΠΉ Π½Π°ΠΊΠ°ΡΠΊΠΎΠΉ Π½Π°Ρ
ΠΎΠ΄ΡΡ Π²ΡΠ΅ Π±ΠΎΠ»Π΅Π΅ ΡΠΈΡΠΎΠΊΠΎΠ΅ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π²ΠΎ ΠΌΠ½ΠΎΠ³ΠΈΡ
ΠΎΠ±Π»Π°ΡΡΡΡ
ΡΠ΅Π»ΠΎΠ²Π΅ΡΠ΅ΡΠΊΠΎΠΉ Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π±Π»Π°Π³ΠΎΠ΄Π°ΡΡ ΠΈΡ
Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ, ΠΊΠΎΠΌΠΏΠ°ΠΊΡΠ½ΠΎΡΡΠΈ ΠΈ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΌΡ ΡΡΠΎΠΊΡ ΡΠ»ΡΠΆΠ±Ρ. ΠΠ»Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΠ·Π»ΡΡΠ°ΡΠ΅Π»Π΅ΠΉ ΠΏΡΠΈ Π΄ΠΈΡΡΠ°Π½ΡΠΈΠΎΠ½Π½ΠΎΠΌ Π·ΠΎΠ½Π΄ΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π°ΡΠΌΠΎΡΡΠ΅ΡΡ ΡΡΠ΅Π±ΡΡΡΡΡ Π»Π°Π·Π΅ΡΡ, ΠΈΠ·Π»ΡΡΠ°ΡΡΠΈΠ΅ Π² ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ ΠΎΠΊΠΎΠ»ΠΎ 2 ΠΌΠΊΠΌ. ΠΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΌΠΈ Π°ΠΊΡΠΈΠ²Π½ΡΠΌΠΈ ΡΡΠ΅Π΄Π°ΠΌΠΈ, ΠΈΠ·Π»ΡΡΠ°ΡΡΠΈΠΌΠΈ Π² ΡΡΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ, ΡΠ²Π»ΡΡΡΡΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ, Π°ΠΊΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΡΡΠ΅Ρ
Π²Π°Π»Π΅Π½ΡΠ½ΡΠΌΠΈ ΠΈΠΎΠ½Π°ΠΌΠΈ ΡΡΠ»ΠΈΡ. Π‘ΡΠ΅Π΄ΠΈ Π»Π΅Π³ΠΈΡΡΠ΅ΠΌΡΡ
ΠΈΠΎΠ½Π°ΠΌΠΈ ΡΡΠ»ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΏΠΎ ΡΠ²ΠΎΠΈΠΌ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌ Π²ΡΠ΄Π΅Π»ΡΡΡΡΡ ΠΊΡΠΈΡΡΠ°Π»Π»Ρ Π΄Π²ΠΎΠΉΠ½ΡΡ
ΠΊΠ°Π»ΠΈΠΉ-ΡΠ΅Π΄ΠΊΠΎΠ·Π΅ΠΌΠ΅Π»ΡΠ½ΡΡ
Π²ΠΎΠ»ΡΡΡΠ°ΠΌΠ°ΡΠΎΠ², ΠΊΠΎΡΠΎΡΡΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΡΡ Π±ΠΎΠ»ΡΡΠΈΠΌΠΈ Π²Π΅Π»ΠΈΡΠΈΠ½Π°ΠΌΠΈ ΠΏΠΎΠΏΠ΅ΡΠ΅ΡΠ½ΡΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎΠ³Π»ΠΎΡΠ΅Π½ΠΈΡ ΠΈ ΡΡΠΈΠΌΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΈΡΠΏΡΡΠΊΠ°Π½ΠΈΡ, Π½Π΅Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΡΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΎΠ½Π½ΡΠΌ ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ Π»ΡΠΌΠΈΠ½Π΅ΡΡΠ΅Π½ΡΠΈΠΈ, ΠΎΡΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΠΌΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠΌΠΈ ΡΠΎΡΡΠ° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Π²ΡΡΠΎΠΊΠΎΠ³ΠΎ ΠΊΠ°ΡΠ΅ΡΡΠ²Π°. Π¦Π΅Π»ΡΡ Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π»Π°Π·Π΅ΡΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² ΠΊΠ°Π»ΠΈΠΉ-Π»ΡΡΠ΅ΡΠΈΠ΅Π²ΠΎΠ³ΠΎ ΠΈ ΠΊΠ°Π»ΠΈΠΉ-ΠΈΡΡΡΠΈΠ΅Π²ΠΎΠ³ΠΎ Π²ΠΎΠ»ΡΡΡΠ°ΠΌΠ°ΡΠΎΠ², Π°ΠΊΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΈΠΎΠ½Π°ΠΌΠΈ ΡΡΠ»ΠΈΡ, Π² Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅. ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΡ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈΡΡ ΠΏΡΠΈ Π΄ΠΈΠΎΠ΄Π½ΠΎΠΉ Π½Π°ΠΊΠ°ΡΠΊΠ΅ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ° Π² ΠΊΠΎΠ½ΡΠΈΠ³ΡΡΠ°ΡΠΈΠΈ ΠΌΠΈΠΊΡΠΎΡΠΈΠΏ-ΡΠ΅Π·ΠΎΠ½Π°ΡΠΎΡΠ°. ΠΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½Π°Ρ ΠΌΠΎΡΠ½ΠΎΡΡΡ Π»Π°Π·Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π½Π° Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ 1947 Π½ΠΌ ΠΏΠΎΠ»ΡΡΠ΅Π½Π° Ρ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠΌ Tm:KY(WO4)2 ΠΈ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 1010 ΠΌΠΡ ΠΏΡΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ 51 %. ΠΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΠΊΡΠΈΡΡΠ°Π»Π»Π° Tm:KLu(WO4)2 Π΄ΠΎΡΡΠΈΠ³Π½ΡΡΠ° Π²ΡΡ
ΠΎΠ΄Π½Π°Ρ ΠΌΠΎΡΠ½ΠΎΡΡΡ Π»Π°Π·Π΅ΡΠ° 910 ΠΌΠΡ Π½Π° Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ 1968 Π½ΠΌ ΠΏΡΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ 38 %. ΠΡΠΈ ΡΡΡΠ°Π½ΠΎΠ²ΠΊΠ΅ Π²Π½ΡΡΡΠΈ ΡΠ΅Π·ΠΎΠ½Π°ΡΠΎΡΠ° ΠΏΡΠΈΠ·ΠΌΡ Π² Π»Π°Π·Π΅ΡΠ΅ Π½Π° ΠΊΡΠΈΡΡΠ°Π»Π»Π΅ Tm:KY(WO4)2 ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π° ΠΏΠ΅ΡΠ΅ΡΡΡΠΎΠΉΠΊΠ° Π΄Π»ΠΈΠ½Ρ Π²ΠΎΠ»Π½Ρ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ Π² ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠΈΡΠΈΠ½ΠΎΠΉ ΡΠ²ΡΡΠ΅ 160 Π½ΠΌ.
ΠΠ΅ΠΏΡΠ΅ΡΡΠ²Π½ΡΠ΅ Π»Π°Π·Π΅ΡΡ Π½Π° ΠΊΡΠΈΡΡΠ°Π»Π»Π΅ Ho:KY(WO4)2ΠΈ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ»ΠΎΠ΅ Ho:KGdYbY(WO4)2 ΠΏΡΠΈ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΠΎΠΉ Π½Π°ΠΊΠ°ΡΠΊΠ΅
2 ΞΌm lasers are in demand for a number of practical applications, such as environmental monitoring, remote sensing, medicine, material processing, and are also used as a pump sources for optical parametric generators. Crystals of double potassium tungstates doped with ions of rare-earth elements were shown to be promising materials both for Β the Β creation Β of Β classical Β solid-state Β lasers Β and Β waveguide Β lasers. The aim of this work was to develop a tunable pump laser in the spectral region of 1.9 Β΅m based on double tungstate crystals doped with thulium ions and to study the lasing characteristics of a Ho:KY(WO4)2Β crystal and a Ho:KGdYbY(WO4)2 single-crystal epitaxial layer under in-band pumping.With a Ho(1at.%):KY(WO4)2 Β crystal, continuous wave low-threshold lasing with an output power of 85 mW with a slope efficiency of 54 % at 2074 nm was achieved. For the first time to our knowledge, continuous wave laser Β generation Β in Β a Β waveguide Β configuration Β is Β realized Β in Β a Β single-crystal Β layer of potassium tungstate doped with holmium ions grown by liquid-phase epitaxy. The maximum output power at a wavelength of 2055 nm was 16.5 mW.ΠΠ°Π·Π΅ΡΠ½ΡΠ΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΈ, ΠΈΠ·Π»ΡΡΠ°ΡΡΠΈΠ΅ Π² ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ ΠΎΠΊΠΎΠ»ΠΎ 2 ΠΌΠΊΠΌ, Π²ΠΎΡΡΡΠ΅Π±ΠΎΠ²Π°Π½Ρ Π΄Π»Ρ ΡΡΠ΄Π° ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠΉ, ΡΠ°ΠΊΠΈΡ
ΠΊΠ°ΠΊ ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³ ΠΎΠΊΡΡΠΆΠ°ΡΡΠ΅ΠΉ ΡΡΠ΅Π΄Ρ, Π΄ΠΈΡΡΠ°Π½ΡΠΈΠΎΠ½Π½ΠΎΠ΅ Π·ΠΎΠ½Π΄ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΠ΅ΠΌΠ»ΠΈ, ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Π°, ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ° ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ², Π° ΡΠ°ΠΊΠΆΠ΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ² Π²ΠΎΠ·Π±ΡΠΆΠ΄Π°ΡΡΠ΅Π³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³Π΅Π½Π΅ΡΠ°ΡΠΎΡΠΎΠ² ΡΠ²Π΅ΡΠ°. ΠΡΠΈΡΡΠ°Π»Π»Ρ Π΄Π²ΠΎΠΉΠ½ΡΡ
ΠΊΠ°Π»ΠΈΠ΅Π²ΡΡ
Π²ΠΎΠ»ΡΡΡΠ°ΠΌΠ°ΡΠΎΠ², Π°ΠΊΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΈΠΎΠ½Π°ΠΌΠΈ ΡΠ΅Π΄ΠΊΠΎΠ·Π΅ΠΌΠ΅Π»ΡΠ½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ², ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ ΡΠ΅Π±Ρ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΌΠΈ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°ΠΌΠΈ ΠΊΠ°ΠΊ Π΄Π»Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²Π΅ΡΠ΄ΠΎΡΠ΅Π»ΡΠ½ΡΡ
, ΡΠ°ΠΊ ΠΈ Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ΄Π½ΡΡ
Π»Π°Π·Π΅ΡΠΎΠ². Π¦Π΅Π»ΡΡ Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΡΠΎΠ·Π΄Π°Π½ΠΈΠ΅ ΠΏΠ΅ΡΠ΅ΡΡΡΠ°ΠΈΠ²Π°Π΅ΠΌΠΎΠ³ΠΎ Π»Π°Π·Π΅ΡΠ° Π½Π°ΠΊΠ°ΡΠΊΠΈ, ΠΈΠ·Π»ΡΡΠ°ΡΡΠ΅Π³ΠΎ Π² ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ 1,9 ΠΌΠΊΠΌ, Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π°ΠΊΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΈΠΎΠ½Π°ΠΌΠΈ ΡΡΠ»ΠΈΡ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² Π΄Π²ΠΎΠΉΠ½ΡΡ
Π²ΠΎΠ»ΡΡΡΠ°ΠΌΠ°ΡΠΎΠ² ΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΊΡΠΈΡΡΠ°Π»Π»Π° Ho:KY(WO4)2 ΠΈ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΏΠΈΡΠ°ΠΊΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΠΎΡ Ho:KGdYbY(WO4)2 ΠΏΡΠΈ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΠΎΠΉ Π½Π°ΠΊΠ°ΡΠΊΠ΅ Π² ΠΏΠΎΠ»ΠΎΡΡ ΠΏΠΎΠ³Π»ΠΎΡΠ΅Π½ΠΈΡ 5I8Β β 5I7 .Π Π»Π°Π·Π΅ΡΠ΅ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΊΡΠΈΡΡΠ°Π»Π»Π° Ho(1Π°Ρ.%):KY(WO4)2 ΠΏΠΎΠ»ΡΡΠ΅Π½Π° Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½Π°Ρ Π½ΠΈΠ·ΠΊΠΎΠΏΠΎΡΠΎΠ³ΠΎΠ²Π°Ρ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΡ Ρ Π²ΡΡ
ΠΎΠ΄Π½ΠΎΠΉ ΠΌΠΎΡΠ½ΠΎΡΡΡΡ 85 ΠΌΠΡ ΠΏΡΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ 54 % Π½Π° Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ 2074 Π½ΠΌ. ΠΠΏΠ΅ΡΠ²ΡΠ΅ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π° Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½Π°Ρ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΡ Π² Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ΄Π½ΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅ Π² ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ»ΠΎΠ΅ ΠΊΠ°Π»ΠΈΠ΅Π²ΠΎΠ³ΠΎ Π²ΠΎΠ»ΡΡΡΠ°ΠΌΠ°ΡΠ°, Π°ΠΊΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΈΠΎΠ½Π°ΠΌΠΈ Π³ΠΎΠ»ΡΠΌΠΈΡ, Π²ΡΡΠ°ΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΆΠΈΠ΄ΠΊΠΎΡΠ°Π·Π½ΠΎΠΉ ΡΠΏΠΈΡΠ°ΠΊΡΠΈΠΈ. ΠΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½Π°Ρ Π²ΡΡ
ΠΎΠ΄Π½Π°Ρ ΠΌΠΎΡΠ½ΠΎΡΡΡ Π½Π° Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ 2055 Π½ΠΌ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 16,5 ΠΌΠΡ
Growth and spectroscopy of Erβ. ββ:KGdβ. βYbβ. ββ Yβ. ββ(WOβ)β epitaxial layer
Growth and spectroscopy of Erβ. ββ:KGdβ. βYbβ. ββ Yβ. ββ(WOβ)β epitaxial layer
CONTINUOUS-WAVE MICROCHIP LASER GENERATION OF Tm:KLu(WO4)2 AND Tm:KY(WO4)2 CRYSTALS
Diode-pumped solid-state lasers are attractive for a variety of practical applications in many fields of human activity due to their high efficiency, compactness, and long durability. For applications in remote sensing lasers emitting in the spectral range of about 2 microns are required. Materials doped with trivalent thulium ions are promising active media emitting in this spectral range. Potassium rare-earth tungstates are attractive materials among Tm-doped crystals due to their suitable characteristics, such as high values of absorption and stimulated emission cross sections, incignificant concentration quenching of luminescence, well-proven technology of the high quality crystals growth. The purpose of this paper was to compare lasing properties of lasers based on potassium lutetium and potassium yttrium tungstate crystals doped with thulium ions in continuous-wave regime. Experiments were carried out with a diode pumping in microchip cavity configuration. The maximum power of laser radiation at 1947 nm of 1010 mW was obtained with Tm:KY(WO4)2 crystal with the slope efficiency with respect to the absorbed pump power of 51 %. When Tm:KLu(WO4)2 crystal was utilized an output power of 910 mW at 1968 nm wavelength with the slope efficiency of 38 % was obtained. With Tm:KLu(WO4)2 laser a tuning range over 160 nm range was realized with a prism inserted into the laser cavity
Laser performance of Er-doped potassium double tungstate epitaxial layers
Laser operation of Er-doped epitaxial layer of monoclinic double tungstate composition grown onto undoped KYW substrate is demonstrated for the first time. Maximum output power of 16 mW with slope efficiency of 64% is achieved at 1606 nm under direct in-band pumping by a diode-pump Er,Yb-laser at 1522 nm.</p
ΠΠ΅ΠΏΡΠ΅ΡΡΠ²Π½ΡΠ΅ Π»Π°Π·Π΅ΡΡ Π½Π° ΠΊΡΠΈΡΡΠ°Π»Π»Π΅ Ho:KY(WO4)2 ΠΈ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ»ΠΎΠ΅ Ho:KGdYbY(WO4)2 ΠΏΡΠΈ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΠΎΠΉ Π½Π°ΠΊΠ°ΡΠΊΠ΅
2 ΞΌm lasers are in demand for a number of practical applications, such as environmental monitoring, remote sensing, medicine, material processing, and are also used as a pump sources for optical parametric generators. Crystals of double potassium tungstates doped with ions of rare-earth elements were shown to be promising materials both for the creation of classical solid-state lasers and waveguide lasers. The aim of this work was to develop a tunable pump laser in the spectral region of 1.9 ΞΌm based on double tungstate crystals doped with thulium ions and to study the lasing characteristics of a Ho:KY(WO4)2 crystal and a Ho:KGdYbY(WO4)2 single-crystal epitaxial layer under in-band pumping. With a Ho(1at.%):KY(WO4)2 crystal, continuous wave low-threshold lasing with an output power of 85 mW with a slope efficiency of 54 % at 2074 nm was achieved. For the first time to our knowledge, continuous wave laser generation in a waveguide configuration is realized in a single-crystal layer of potassium tungstate doped with holmium ions grown by liquid-phase epitaxy. The maximum output power at a wavelength of 2055 nm was 16.5 mW
Growth and spectroscopic properties of Sm3+:KY(WO4)2 crystal
A Sm3+:KY(WO4)2 crystal was grown by the modified Czochralski technique. Polarized absorption and fluorescence spectra, as well as a fluorescence decay curve, were recorded at room temperature. Radiative properties such as emission probabilities, branching ratios and radiative lifetimes were investigated within the framework of the Judd-Ofelt theory as well as the theory of f-f transition intensities which takes into account the influence of the excited configurations. Emission cross section spectra were determined. 4G5/2 fluorescence decay was analyzed within the framework of the Inokuti-Hirayama model. The spectroscopic properties of Sm:KYW crystal were compared with those of other Sm3+-doped materials