Multiphonon 4fN-4fN Nonradiative Transitions of Ln3+ Activators in Laser Crystals

AbstractExpanding the crystal field in terms of operators that transform as the irreducible representations of the Td group leads to an intuitive interpretation of the crystal-field parameters. We apply this method to the crystal field experienced by Nd3+ dopants in the laser crystals YLiF4, YVO4, and KLiYF5.

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Multifunctional Optical Crystals for All-Solid-State Raman Lasers

Crystals ◽

10.3390/cryst11020114 ◽

2021 ◽

Vol 11 (2) ◽

pp. 114

Author(s):

Hui Zhao ◽

Shibo Dai ◽

Siqi Zhu ◽

Hao Yin ◽

Zhen Li ◽

...

Keyword(s):

Solid State ◽

Continuous Wave ◽

Frequency Doubling ◽

Raman Laser ◽

Rare Earth Ions ◽

Excellent Performance ◽

The Past ◽

Raman Lasers ◽

Optical Crystals ◽

Laser Crystals

In the past few decades, the multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. In this review, we briefly show two kinds of multifunctional Raman crystals: self-Raman (laser and Raman effects) crystals and self-frequency-doubled Raman (frequency-doubling and Raman effects) crystals. We firstly introduce the properties of the self-Raman laser crystals, including vanadate, tungstate, molybdate and silicate doped with rare earth ions, as well as self-frequency-doubled Raman crystals, including KTiOAsO4 (KTA) and BaTeMo2O9 (BTM). Additionally, the domestic and international progress in research on multifunctional Raman crystals is summarized in the continuous wave, passively Q-switched, actively Q-switched and mode-locked regimes. Finally, we present the bottleneck in multifunctional Raman crystals and the outlook for future development. Through this review, we contribute to a general understanding of multifunctional Raman crystals.

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Determination of non-linear refractive index of laser crystals and ceramics via different optical techniques

Optical Materials X ◽

10.1016/j.omx.2020.100065 ◽

2020 ◽

Vol 8 ◽

pp. 100065

Author(s):

Laurent Lamaignère ◽

Guido Toci ◽

Barbara Patrizi ◽

Matteo Vannini ◽

Angela Pirri ◽

...

Keyword(s):

Refractive Index ◽

Optical Techniques ◽

Linear Refractive Index ◽

Non Linear ◽

Laser Crystals

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Simulation of birefringence in laser crystals

10.1117/12.2037321 ◽

2014 ◽

Cited By ~ 4

Author(s):

Thomas Graupeter ◽

Christoph Pflaum

Keyword(s):

Laser Crystals

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RARE-EARTH DOPED POTASSIUM LEAD BROMIDE MID-IR LASER SOURCES FOR STANDOFF DETECTION

International Journal of High Speed Electronics and Systems ◽

10.1142/s0129156408005709 ◽

2008 ◽

Vol 18 (03) ◽

pp. 735-745 ◽

Cited By ~ 6

Author(s):

KRISHNA C. MANDAL ◽

SUNG H. KANG ◽

MICHAEL CHOI ◽

R. DAVID RAUH

Keyword(s):

Rare Earth ◽

Emission Spectra ◽

Optical Quality ◽

Scanning Calorimetry ◽

Laser Applications ◽

Excellent Thermal Stability ◽

Standoff Detection ◽

Lead Bromide ◽

Vertical Bridgman ◽

Laser Crystals

The single crystal growth of KPb 2 Br 5 by vertical Bridgman technique using in-house processed zone refined PbBr 2 and KBr with rare-earth terbium doping has been studied. The grown moisture resistant crystals (1.5 cm diameter and 10 cm length) have shown high promise for low phonon energy room temperature solid-state laser applications in the longer side of mid-IR (4-15 µm) due to their high storage lifetimes, wide tunability, and excellent optical quality. The processed crystals are highly transparent ( T = ≥80%) in the 0.4-25 µm spectral region. Repeated melting-freezing cycles during differential scanning calorimetry (DSC) experiments did not reveal any appreciable variation in the melting point or phase transitions, which is indicative of their excellent thermal stability. The emission spectra pumped with a 2 µm source show broadband emissions with peak wavelength of 3 µ m (7 F 4→ 7 F6), 5µ m (7 F 5→ 7 F 6) and 7.9µ m (7 F 4→ 7 F 5). The KPb 2 Br 5: Tb laser crystals will be highly useful for standoff detection of incoming chemical and biological threats using unique infrared absorption signatures.

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