Compact self-Q-switched Tm:YLF laser at 1.91 μm

Zhang, B.; Li, L.; He, Chao; Tian, Fengjun; Yang, Xinghua; Cui, Jinhui; Zhang, J.Z.; Sun, Wei

doi:10.1016/j.optlastec.2017.10.001

Cited by 30 publications

(9 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to -NaYF4, Czochralski-grown crystals of lanthanide-doped LiYF4 are commercially available from various suppliers and widely used as solid state laser materials. Well-known examples are LiYF4:Pr [13][14][15][16][17][18][19][20], LiYF4:Nd [21][22][23][24][25][26][27][28][29], LiYF4:Yb [30][31][32][33][34][35], LiYF4:Er [36][37][38][39][40][41][42][43], LiYF4:Ho [44][45][46][47][48][49][50] and LiYF4:Tm [51][52][53][54][55][56]. LiYF4 laser crystals are grown under strict exclusion of water and humidity to avoid the incorporation of OH − into the fluoride lattice which is a well-known luminescence quencher owing to its highfrequency vibrational modes [57,58].…”

Section: Introductionmentioning

confidence: 99%

LiYF4:Yb/LiYF4 and LiYF4:Yb,Er/LiYF4 core/shell nanocrystals with luminescence decay times similar to YLF laser crystals and the upconversion quantum yield of the Yb,Er doped nanocrystals

et al. 2020

View full text Add to dashboard Cite

We developed a procedure to prepare luminescent LiYF4:Yb/LiYF4 and LiYF4:Yb,Er/LiYF4 core/shell nanocrystals with a size of approximately 40 nm revealing luminescence decay times of the dopant ions that approach those of high-quality laser crystals of LiYF4:Yb (Yb:YLF) and LiYF4:Yb,Er (Yb,Er:YLF) with identical doping concentrations. As the luminescence decay times of Yb3+ and Er3+ are known to be very sensitive to the presence of quenchers, the long decay times of the core/shell nanocrystals indicate a very low number of defects in the core particles and at the core/shell interfaces. This improvement in the performance was achieved by introducing two important modifications in the commonly used oleic acid based synthesis. First, the shell was prepared via a newly developed method characterized by a very low nucleation rate for particles of pure LiYF4 shell material. Second, anhydrous acetates were used as precursors and additional drying steps were applied to reduce the incorporation of OH− in the crystal lattice, known to quench the emission of Yb3+ ions. Excitation power density (P)-dependent absolute measurements of the upconversion luminescence quantum yield (ΦUC) of LiYF4:Yb,Er/LiYF4 core/shell particles reveal a maximum value of 1.25% at P of 180 Wcm−2. Although lower than the values reported for NaYF4:18%Yb,2%Er core/shell nanocrystals with comparable sizes, these ΦUC values are the highest reported so far for LiYF4:18%Yb,2%Er/LiYF4 nanocrystals without additional dopants. Further improvements may nevertheless be possible by optimizing the dopant concentrations in the LiYF4 nanocrystals.

show abstract

Section: Introductionmentioning

confidence: 99%

LiYF4:Yb/LiYF4 and LiYF4:Yb,Er/LiYF4 core/shell nanocrystals with luminescence decay times similar to YLF laser crystals and the upconversion quantum yield of the Yb,Er doped nanocrystals

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In 2005, Su et al reported their SQS laser based on the Yb 3+ ,Na + :CaF2 single crystal and obtained 1.5 μs pulses at 1050 nm with the repetition rate of 28 kHz and the average power of 400 mW [19]. Gupta [25].…”

Section: Introductionmentioning

confidence: 99%

“…obtained the 1.91 μm pulses from the Tm: YLF laser applying SQS technique in 2018. The corresponding pulse width and repetition rate were 1.4 μs and 21 kHz respectively, and the average output power was 610 mW [25].…”

Section: Introductionmentioning

confidence: 99%

High Power Self-Q-Switching in Nd:LuAG Laser

Zhang¹,

Fu²,

Shen³

et al. 2018

IEEE Photonics J.

123

View full text Add to dashboard Cite

Received Month X, XXXX; revised Month X, XXXX; accepted Month X, XXXX;posted Month X, XXXX (Doc. ID XXXXX); published Month X, XXXX A compact pulsed Nd:LuAG laser at 1064 nm based on the self-Q-switching technique is reported, having the output power as high as 6.61 W at the incident pump power of 21.32 W, corresponding to the optical conversion efficiency of~31 %. The temporal width of the pulse was in the range from 532.2 ns to 652.6 ns, and the repetition rate varied between 488.6 kHz and 551.9 kHz. To the best of our knowledge, this is the first report on the self-Q-switching Nd:LuAG laser. Possible reasons for the self-Q-switching of Nd:LuAG were also provided, and the factor leading to the high repetition rate was analyzed. The compact cavity generating pulses with high output power and high repetition rate not only reveal that the self-Q-switching technique could be an efficient method for the generation of pulses with high output power and high repetition rate, but enrich the characteristics of Nd:LuAG crystal.

show abstract

“…At present, the self-pulsing solid-state lasers in the 1 µm waveband have been widely investigated [22][23][24][25][26][27][28][29][30][31][32][33]. However, only a few self-pulsing solid-state lasers in the 2 µm spectral region have been reported [34][35][36][37][38][39]. In 1995, the stable self-Q-switching pulse output of a monolithic Tm:YAP microlaser was first realized by Razdobreev, and the pulse repetition frequency increased with the pump power [34].…”

Section: Introductionmentioning

confidence: 99%

“…At an absorbed pump power of 7.04 W, the maximum average output power was 1.68 W and the shortest pulse width was 1.64 µs. The pulse repetition frequency increased from 20.68 to 65.16 kHz when the absorbed pump power was changed from 1.74 to 7.04 W. Based on the saturable reabsorption effect of the quasi-three-level system, the self-Q-switched pulse output of the 1.91 µm Tm:YLF laser was achieved by Zhang et al in 2017 [37]. The average output power and the pulse width were 600 mW and 1.5 µs, respectively, at a maximum absorbed pump power of 4.5 W. Moreover, the pulse repetition frequency increased from 3 to 21 kHz, with the absorption pump power going from 1 to 4.5 W. Recently, the self-modelocking of solid-state lasers at a 2 µm spectral region have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Stable pulse output of a diode-pumped Tm:YAP laser based on the longitudinal mode beating effect

Zhang

Zhong

et al. 2020

Laser Phys.

View full text Add to dashboard Cite

We successfully demonstrate the stable pulse output of a diode-end-pumped Tm:YAP laser based on the longitudinal mode beating technique. Without any additional modulation elements in the cavity, the stable pulse output of a Tm:YAP laser at 1937 nm is achieved. At an absorbed pump power of 6 W, the average output power of 1.14 W is obtained with a slope efficiency of 23%, and the pulse duration is 5.3 ns with a pulse repetition frequency of 89 MHz. To the best of our knowledge, this is the first 2 µm self-pulsing solid-state laser based on the longitudinal mode beating effect.

show abstract

Compact self-Q-switched Tm:YLF laser at 1.91 μm

Cited by 30 publications

References 40 publications

LiYF4:Yb/LiYF4 and LiYF4:Yb,Er/LiYF4 core/shell nanocrystals with luminescence decay times similar to YLF laser crystals and the upconversion quantum yield of the Yb,Er doped nanocrystals

LiYF4:Yb/LiYF4 and LiYF4:Yb,Er/LiYF4 core/shell nanocrystals with luminescence decay times similar to YLF laser crystals and the upconversion quantum yield of the Yb,Er doped nanocrystals

High Power Self-Q-Switching in Nd:LuAG Laser

Stable pulse output of a diode-pumped Tm:YAP laser based on the longitudinal mode beating effect

Contact Info

Product

Resources

About