Spectroscopic properties and laser performances of Yb:LGSB nonlinear optical crystal

Khaled, F.; Loiseau, Pascal; Voicu, Flavius; Achim, Alexandru; Hau, Ştefania; Gheorghe, C.; Croitoru, Gabriela; Pavel, N.; Gheorghe, L.; Aka, G.

doi:10.1016/j.jallcom.2016.07.048

Cited by 12 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorption cross-section, a at 980 nm for σ-polarization is about 0.6×10 −20 cm 2 with a bandwidth (FWHM definition) of 33 nm, being 1.65 times larger than that of Yb:YAB crystal [2]. In the case of π-polarization, the highest a was determined to be 0.37×10 −20 cm 2 at 904 nm, being close to the value reported for Yb:LGSB crystal [3]. Furthermore, spectroscopic studies revealed an intrinsic disorder due to the presence of Yb 3+ ions in the trigonal prismatic sites occupied by La 3+ and Y 3+ ions and also in the octahedral sites occupied by Sc 3+ ions.…”

supporting

confidence: 74%

New Yb:LYSB bifunctional crystal for efficient near-infrared laser emission and self-frequency doubling conversion

et al. 2020

Self Cite

View full text Add to dashboard Cite

supporting

confidence: 74%

New Yb:LYSB bifunctional crystal for efficient near-infrared laser emission and self-frequency doubling conversion

et al. 2020

Self Cite

View full text Add to dashboard Cite

“…On the other hand, the absorption cross-section at 980 nm was higher for σ-polarization, having a maximum value of σ abs = 0.6 × 10 −20 cm 2 with an associated FWHM of 33 nm. Compared to other huntite-type crystals, the value of σ abs at 980 nm was smaller than that of the well-known YAB:Yb crystal (σ abs = 3.4 × 10 −20 cm 2 ) [45] and close to the value for the LGSB:Yb crystal (σ abs = 0.47 × 10 −20 cm 2 ) [46]. However, the FWHM bandwidth was larger, with a factor of 1.65, than the corresponding value for the YAB:Yb crystal (FWHM of 20 nm at 975 nm) [45], thus being advantageous for laser diode pumping.…”

Section: Spectroscopic Propertiescontrasting

confidence: 55%

“…Taking into account that Yb 3+ ions may substitute both RE 3+ (RE = La, Y) and Sc 3+ ions, we can attribute this shift to the modification of the contents of RE and Sc cations in the LYSB host matrix induced by doping with Yb 3+ ions. Compared to the isostructural LGSB:Yb crystal [46], LYSB:Yb had a higher transmission and also showed no absorption lines in the UV spectral range specific to Gd 3+ ions, thus being more advantageous for NLO applications, particularly in the UV domain. The room-temperature (300 K) and low-temperature (10 K) absorption and emission spectra of the LYSB:Yb (4 at.%) crystal were recorded in polarized light on a 0.93 mm thick crystal sample oriented perpendicular to the a-axis direction (a-cut).…”

Section: Spectroscopic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Pure and Yb-Doped LaxYySc4-x-y(BO3)4 Crystals: A Review of Recent Advances

et al. 2023

Self Cite

View full text Add to dashboard Cite

This paper reviews the progress in developing the LaxYySc4-x-y(BO3)4-LYSB and Yb-doped LaxYySc4-x-y(BO3)4-LYSB:Yb huntite-type crystals grown by the Czochralski method as new candidates for the next generation of nonlinear optical (NLO) and/or laser crystals. Considering the incongruent melting of these crystals, the initial compositions of the melt and the pulling and rotation rates were optimized. Additionally, a special thermal setup was engineered to grow LYSB-type crystals by the Czochralski crystal growth method. The chemical compositions of the LYSB and LYSB:Yb grown crystals were found to be La0.78Y0.32Sc2.90(BO3)4 and La0.78Y0.32Yb0.04Sc2.86(BO3)4, respectively. Therefore, for the LYSB:Yb crystal, the doping concentration of Yb3+ ions was considered to be 4 at.% with respect to the nonstoichiometric (La1-xYx)1.25Sc2.75(BO3)4 undoped compounds, i.e., LYSB:Yb (4 at.%). In terms of NLO properties, the obtained results demonstrate that LYSB and LYSB:Yb (4 at.%) crystals possess remarkable properties specific to huntite-type crystals. The main advantage of these crystals consists in the fact that they may be obtained with large dimensions and excellent optical quality by the Czochralski method, which recommends them as a new class of highly efficient crystals for different NLO applications, including second harmonic generation (SHG) of high-power or high-energy laser beams. The laser performances of the LYSB:Yb (4 at.%) crystal prove its favorable intrinsic properties to generate laser emissions in the 1 µm range with high efficiency. The efficient laser emission at ~1028 nm together with good NLO characteristics to convert its own emission into emission at ~514 nm via SHG make the LYSB:Yb (4 at.%) crystal a very promising active medium to be used in self-frequency doubling configuration.

show abstract

“…The advantage of the LGSB crystal is that it can be grown to a large size and with a high quality by the Czochralski method. In the same year, Khaled et al achieved efficient laser emission from a Czochralski grown 12.9-at.% Yb:LGSB nonlinear optical crystal, reporting 0.94 W CW output power at 1070 nm, for a P abs = 2.8 W at 972 nm, with 44% slope efficiency [29].…”

Section: Introductionmentioning

confidence: 99%

Efficient 1 µm Laser Emission of Czochralski-Grown Nd:LGSB Single Crystal

et al. 2019

Self Cite

View full text Add to dashboard Cite

A 5.0-at.% Nd-doped La0.64Gd0.41Sc2.95(BO3)4 (Nd:LGSB) borate laser crystal was successfully grown by the Czochralski method, for the first time to our knowledge. The spectroscopic properties of the grown crystal are discussed and 1 µm laser emission, under end-pumping with a fiber-coupled diode laser at 807 nm, is reported. A c-cut Nd:LGSB medium yielded 1.35 W continuous-wave output power at 0.63 overall optical-to-optical efficiency, with respect to the absorbed pump power, together with the high 0.68 slope efficiency. With an a-cut Nd:LGSB sample, 0.81 W output power at 0.52 optical-to-optical efficiency was obtained. The laser emission performances under quasi-continuous wave pumping are presented as well, for both c-cut and a-cut crystals. Passive Q-switching was investigated with a semiconductor saturable absorber mirror (SESAM). Laser pulses with 2.2 µJ energy and 32.8 ns durations were recorded from a-cut Nd:LGSB. The average output power reached 0.36 W at 1.55 W absorbed pump power. Passive mode-locking with SESAM was achieved in a long Z-type resonator. Ultrashort pulses with 0.19 W average power, 1.63 nJ energy, and 1.43 ps pulse duration, at 118 MHz repetition rate, are demonstrated for the a-cut Nd:LGSB medium.

show abstract

Spectroscopic properties and laser performances of Yb:LGSB nonlinear optical crystal

Cited by 12 publications

References 24 publications

New Yb:LYSB bifunctional crystal for efficient near-infrared laser emission and self-frequency doubling conversion

New Yb:LYSB bifunctional crystal for efficient near-infrared laser emission and self-frequency doubling conversion

Pure and Yb-Doped LaxYySc4-x-y(BO3)4 Crystals: A Review of Recent Advances

Efficient 1 µm Laser Emission of Czochralski-Grown Nd:LGSB Single Crystal

Contact Info

Product

Resources

About