High-peak-power electro-optically Q-switched laser with a gradient-doped Nd:YAG crystal

Ma, Wei; Cheng, Tingqing; Dou, Renqin; Zhang, Qingli; Jiang, Haihe

doi:10.1364/ol.442131

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…As one of the three fundamental elements of a laser, the pump source is indispensable and an optimal design scheme is extremely important. LD end pumping is an effective way to provide the best overlap between the pump and resonant laser modes, which leads to high conversion efficiency, good beam quality, and compact structure 18 – 20 As to the gain medium, the Nd:YAG crystal has dominated in commercialized solid-state lasers in the 1-μm spectral range, 15 , 21 owing to its good optical and mechanical property, high thermal conductivity, as well as its mature growth technology.…”

Section: Introductionmentioning

confidence: 99%

“…used an Nd:YAG slab pumped at 885 nm to accomplish laser pulses of 3 mJ, 6.5 ns at 2 kHz with a L-shaped cavity length of 210 mm. Wei et al 18 . used a gradient-doped Nd:YAG crystal to reduce the thermal effect, which achieved the average output power of 6.9 W at 2 kHz with a cavity length of 160 mm.…”

Section: Introductionmentioning

confidence: 99%

“…LD end pumping is an effective way to provide the best overlap between the pump and resonant laser modes, which leads to high conversion efficiency, good beam quality, and compact structure. [18][19][20] As to the gain medium, the Nd:YAG crystal has dominated in commercialized solid-state lasers in the 1-μm spectral range, 15,21 owing to its good optical and mechanical property, high thermal conductivity, as well as its mature growth technology. So far, remarkable results of end-pumped EO Q-switched Nd:YAG lasers have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…23 Xu et al 24 used an Nd:YAG slab pumped at 885 nm to accomplish laser pulses of 3 mJ, 6.5 ns at 2 kHz with a L-shaped cavity length of 210 mm. Wei et al 18 used a gradient-doped Nd:YAG crystal to reduce the thermal effect, which achieved the average output power of 6.9 W at 2 kHz with a cavity length of 160 mm. In addition to alleviating thermal effects via elaborate design of laser crystal and pump scheme, the size and robustness of the laser have also received considerable attention.…”

Section: Introductionmentioning

confidence: 99%

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Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

et al. 2023

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We report a compact and highly stable 1064-nm electro-optic Q-switched laser operating at the repetition rate of 1 kHz. A composite Nd:YAG crystal was used as the gain media and the cavity length was 105 mm. Under the average pump power of 11 W, the output power achieved 2.404 W with the pulse width of 4.558 ns, corresponding to the maximum peak power of 0.527 MW and the optical-to-optical conversion efficiency of 21.85%. The slope efficiency reached 42.69%. The beam quality in the horizontal (M 2x ) and vertical (M 2 y ) directions were 1.81 and 1.58, respectively. The pulse timing jitter was less than 1 ns, and the average power fluctuation measured within 30 min was 0.83% (RMS). It is believed that such a compact and highly stable pulsed laser with high repetition rate, high peak power, and good beam quality has great potential in the fields of lidar, etc.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

et al. 2023

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“…In recent decades, there has been considerable interest in high-power and high-efficiency ∼1 μm solid-state lasers based on trivalent neodymium (Nd 3+ ) ion-doped laser crystals. , These lasers have attracted attention due to their multifunctional applications in various fields, including industry, scientific research, healthcare, and the military. − The most well-known laser crystals doped with Nd 3+ ions at ∼1 μm wavelengths are yttrium aluminum garnet (Nd:YAG) and vanadate family crystals (Nd:YVO 4 and Nd:GdVO 4 ). , Nd:YAG crystals have been widely utilized for high-power ∼1 μm lasers due to their high thermal conductivity and excellent physical–chemical properties, − while Nd 3+ ion-doped vanadate family crystals have been extensively employed for achieving high-efficiency ∼1 μm lasers . However, both Nd:YAG and Nd 3+ ion-doped vanadate family crystals still face certain challenges.…”

Section: Introductionmentioning

confidence: 99%

Trivalent Neodymium-Doped Double Molybdate/Tungstate Composite Laser Crystals

Ding,

Hu,

Zou

et al. 2023

Crystal Growth & Design

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The use of inhomogeneous broadening in composite disordered crystals has been widely recognized as a successful approach to enhancing the spectral bandwidth of rare-earth ions in optical spectra. In this study, composite disordered laser crystals of rare-earth alkali metal double molybdate/tungstate, doped with 2 atom % Nd 3+ and represented by the general formula Nd:NaGd-(Mo x W 1−x O 4 ) 2 (x = 0.5, 0.7 and 0.9), were grown using the Czochralski method. The crystal structure of the disordered laser crystals was determined to be of the tetragonal phase with a space group of I4 1 /a, as confirmed through X-ray diffraction (XRD) and Rietveld refinement analyses. The spectroscopic properties of the disordered laser crystal, encompassing absorption, emission, and fluorescence decay characteristics were investigated. The (MoO 4 ) 1.0 (WO 4 ) 1.0 composite crystal exhibited an exceptionally broad absorption bandwidth, with a full width at half-maximum (FWHM) of 21 at 808 nm, approximately 10 times wider than that of the well-known Nd:YAG crystal. Moreover, the composite crystal demonstrated the generation of a continuous-wave 1.06 μm laser, which was further frequency-doubled to produce a 532 nm laser. Additionally, the passively Q-switched laser behavior of the composite crystal at 1.06 μm was explored, utilizing tungsten disulfide as a saturable absorber. In summary, the double molybdate/tungstate composite disordered crystal exhibits advantageous characteristics, such as a low melting point (approximately 1200 °C), stable physical−chemical properties, and remarkable spectroscopic properties. These features highlight the potential applications of these composite crystals in all solid-state lasers. Highquality Nd-doped double molybdate/tungstate composite disordered laser crystals were grown by the Czochralski method. By implementing a composite engineering strategy, an exceptionally inhomogeneous spectral broadening with an fwhm of up to 21 at 808 nm was achieved.

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Limitations of homogeneous and segmented single-crystal compact TEM00-mode Ho3+:YAG laser resonators

et al. 2023

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We present investigations on output power limitations of near-diffraction-limited compact $$\hbox {Ho}^{3+}$$ Ho 3 + :YAG laser resonators employing a homogeneous or segmented laser crystal. An approach for designing a segmented crystal is presented. Maximum output powers of $${57.6}\,\hbox {W}$$ 57.6 W and $${51.9}\,\hbox {W}$$ 51.9 W are reached with the homogeneous and segmented crystal, respectively, resulting in pulse energies of $${1.14}\,\hbox {mJ}$$ 1.14 mJ and $${1.04}\,\hbox {mJ}$$ 1.04 mJ at a repetition rate of $${50}\,\hbox {kHz}$$ 50 kHz in Q-switched operation. Interferometric experiments are conducted to derive the radial temperature profile for both crystals. Simulations based on a split-step beam propagation method are used to model the longitudinal temperature gradient in both crystals.

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High-peak-power electro-optically Q-switched laser with a gradient-doped Nd:YAG crystal

Cited by 10 publications

References 18 publications

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

Trivalent Neodymium-Doped Double Molybdate/Tungstate Composite Laser Crystals

Limitations of homogeneous and segmented single-crystal compact TEM00-mode Ho3+:YAG laser resonators

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