Littrow-type discretely tunable, Q-switched Nd:YAG laser around 1.3 μm

Saha, Ardhendu; Ray, Aniruddha; Mukhopadhyay, S.; Datta, Prasanta Kumar; Dutta, Pranab; Saltiel, S.

doi:10.1007/s00340-007-2608-8

Cited by 17 publications

(6 citation statements)

References 23 publications

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“…For the crystal lasers, the result matches well with those reported previously, namely, the intensity of the 1319 nm emission is much higher than that of the 1338 nm emission. 7,19) The result is also in agreement with that of a laser diode (LD) side-pumped Nd:YAG crystal laser under the 1319 and 1338 nm dual-wavelength operation. 19) However, it is interesting to note that for the ceramic lasers, strong emission was observed at 1338 nm.…”

supporting

confidence: 81%

“…7,19) The result is also in agreement with that of a laser diode (LD) side-pumped Nd:YAG crystal laser under the 1319 and 1338 nm dual-wavelength operation. 19) However, it is interesting to note that for the ceramic lasers, strong emission was observed at 1338 nm. This result clearly shows that there is a difference between the 4 F 3=2 -4 I 13=2 transitions of the Nd 3þ ions in the single crystal and the ceramic lasers.…”

supporting

confidence: 81%

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Comparison of the 1319 and 1338 nm Dual-Wavelength Emission of Neodymium-Doped Yttrium Aluminum Garnet Ceramic and Crystal Lasers

Duan

Zhu

et al. 2013

Appl. Phys. Express

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The 1319 and 1338 nm dual-wavelength operation of neodymium-doped yttrium aluminum garnet (Nd:YAG) ceramic and single-crystal lasers was experimentally compared. It was found that, although the single-crystal lasers preferably to oscillate at 1319 nm under strong pumping, the ceramic lasers tend to operate at 1338 nm, indicating the existence of a subtle difference between the 4 F 3=2 -4 I 13=2 transitions of the Nd 3þ ions in the Nd:YAG crystal and ceramic lasers. #

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supporting

confidence: 81%

supporting

confidence: 81%

Comparison of the 1319 and 1338 nm Dual-Wavelength Emission of Neodymium-Doped Yttrium Aluminum Garnet Ceramic and Crystal Lasers

Duan

Zhu

et al. 2013

Appl. Phys. Express

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“…y YAG声光调Q激光器中, 获得重复频率100 Hz、平均功率0.55 W、脉冲宽度50 ns的脉冲激光, 其单脉冲能量5.5 mJ. 同年, Lu等 [9] 报道了在1.3 µm 的Nd:YVO 4 声光调Q激光器中, 获得重复频率 10 kHz、最窄脉冲宽度19 ns的激光输出, 其平均功率为6.3 W, 最大单脉冲能量为0.63 mJ, 光束质量因子 = 2.5, = 3. 同年, Saha等 [10] 报道了在1.3 µm二极管侧泵的Nd:YAG声光调Q 激光器中, 重复频率为37 kHz时, 获得最窄脉冲宽度251 ns的激光输出, 对应平均功率6.77 W, 其最大单脉冲能量0.183 mJ.…”

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1.3-μm 2.8-ns electro-optical cavity damping Nd:YVO4 laser

Yao¹,

Ge²,

Xia³

et al. 2023

Acta Phys. Sin.

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1.3 μm Nd laser has significant practical applications in various fields, such as fiber communication, medical treatment, frequency conversion, and scientific research, etc. Many applications of a 1.3 μm laser, especially like frequency conversion, benefit much from a short pulse width with high peak power. In the paper, an electro-optical cavity dumping Nd:YVO4 laser at 1342 nm wavelength has been studied theoretically and experimentally. The pulse width for an electro-optical cavity dumping laser is determined by the optical length of the cavity. A narrower pulse width can be obtained by reducing the length of the cavity and the round trip time of the laser in the cavity. However, when the round trip time in the cavity approaches to the falling edge time of the electro-optical switch, shortening the length of the cavity will not get a narrower pulse width, and the falling edge time of the electro-optical switch will influence the laser pulse width. The temporal characteristics of the laser pulse are simulated when the falling edge time of the electro-optical switch is close to the round trip time in the cavity. Influences of the falling edge time of the electro-optical switch on the laser pulse duration are analyzed theoretically. The modified rate equation is used to study the relationship between the falling edge time and the laser pulse width. We demonstrate an electro-optical cavity dumping Nd:YVO4 laser. The 0.3 at.% Nd:YVO4 placed in a short Plano-concave cavity is in-band pumped by an 880 nm quasi-continuous-wave diode. A fiber-coupled diode laser module (NA=0.22) with a power of 30 W was used. A LiNbO3 electro-optical switch was employed for the cavity-dumping. The 1342 nm cavity-dumping laser operates at a repetition rate of 1kHz, and a single-pulse energy of 0.21 mJ is obtained with a pulse width of 2.8 ns. Near-diffraction-limited beam quality with an M2 value of < l.2 is achieved. The setup provides efficient second harmonic generation at 671 nm using a MgO:PPLN crystal, and the pulse width is 1.8 ns. To the best of our knowledge, this is the shortest pulse duration obtained from 1.3μm actively Q-switched Nd-doped laser.

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“…Com pared with that of 1.06 μm lasers, 1.34 μm lasers with characteristics of tenfold higher absorption in water and one third extinction in blood, are being applied in resection of pulmonary metastases and dental applica tions recently [31,32]. Thus the diode pump solid state lasers operating at 1.34 μm wavelength region have attracted a great deal of attention [33][34][35]. Until now, most of the research interest involving 1341 nm radiation has been focused on Nd doped vanadates [36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%