Study on pump pulse characteristics of QCW diode-side-pumped Nd:YAG laser

Abstract The influence of pumping laser pulse on the property of quasi-continuous-wave diode-side-pumped Nd:YAG laser is investigated theoretically and experimentally here. Under remaining a fixed duty cycle, the average output power increases, and the corresponding thermal focal length shorten with the increase of the pump pulse duration, which attributes to the decrease of the ratio of pulse buildup time to the pulse duration. At a pump power of 146 W, the laser output power changes from 65.1 W to 81.2 W when the pulse duration is adjusted from 150 μs to 1000 μs, confirming a significant enhancement of 24.7%. A laser rate equation model incorporating the amplified spontaneous emission is also utilized and numerically solved, and the simulated results agree well with the experimental data.

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Experimental and Theoretical Study of an Actively Q-Switched Tm:YLF Laser with an Acousto-Optic Modulator

Molecules ◽

10.3390/molecules26237324 ◽

2021 ◽

Vol 26 (23) ◽

pp. 7324

Author(s):

Lei Guo ◽

Yaling Yang ◽

Ruihua Wang ◽

Baitao Zhang ◽

Tao Li ◽

...

Keyword(s):

Output Power ◽

Continuous Wave ◽

Maximum Output Power ◽

Photon Number ◽

High Repetition Rate ◽

Equation Model ◽

Maximum Output ◽

Average Output ◽

Output Characteristics ◽

Tm:Ylf Laser

We report the characteristics of a diode-end-pumped, high-repetition-rate, acoustic-optic (AO) Q-switched Tm:YLF laser operating from 5 kHz to 10 kHz. In the continuous-wave (CW) regime, a maximum average output power of 8.5 W was obtained with a slope efficiency of 30.7%. Under the AO Q-switching regime, a maximum output power of 7.32 W was obtained at a repetition frequency of 5 kHz with a pulse width of 68 ns and a pulse energy of 1.4 mJ, corresponding to a peak power of 21.5 kW. A time-dependent rate equation model is introduced to theoretically analyze the results obtained in the experiment, in which the cross-relaxation phenomenon, upconversion losses and ground-state depletion are taken into account. Additionally, the evolution processes of population inversion density and intracavity photon number density with time are also presented. The theoretical results well predict the dependence of laser output characteristics of Tm:YLF crystal on the incident pump powers.

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Continuous-Wave and Passively Q-Switched Er:Y2O3 Ceramic Laser at 2.7 μm

International Journal of Optics ◽

10.1155/2018/3153614 ◽

2018 ◽

Vol 2018 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Zhipeng Qin ◽

Guoqiang Xie ◽

Jian Zhang ◽

Jingui Ma ◽

Peng Yuan ◽

...

Keyword(s):

Output Power ◽

Continuous Wave ◽

Maximum Output Power ◽

Maximum Output ◽

Average Output ◽

Semiconductor Saturable Absorber ◽

Infrared Spectral ◽

Maximum Average Output Power ◽

Ceramic Laser ◽

Stable Passive

We report on a continuous-wave (CW) and passively Q-switched Er:Y2O3 ceramic laser in mid-infrared spectral region. In the CW regime, a maximum output power of 2.07 W is achieved at 2717.3 nm with a slope efficiency of 13.5%. Stable passive Q-switching of the Er:Y2O3 ceramic laser is demonstrated based on semiconductor saturable absorber mirror. Under an absorbed pump power of 12.4 W, a maximum average output power of 223 mW is generated with a pulse energy of 1.7 μJ and a pulse width of 350 ns at 2709.3 nm.

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Diode-Pumped Passive Q-Switched 946-nm Nd:YAG Laser with 2.1-W Average Output Power

Chinese Physics Letters ◽

10.1088/0256-307x/22/6/033 ◽

2005 ◽

Vol 22 (6) ◽

pp. 1420-1422 ◽

Cited By ~ 23

Author(s):

Zhang Ling ◽

Li Chun-Yong ◽

Feng Bao-Hua ◽

Wei Zhi-Yi ◽

Li De-Hua ◽

...

Keyword(s):

Output Power ◽

Nd:Yag Laser ◽

Average Output Power ◽

Average Output ◽

Diode Pumped

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Towards high average output power and short pulse duration of SESAM modelocked thin disk lasers

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC ◽

10.1109/cleoe-iqec.2013.6800620 ◽

2013 ◽

Author(s):

C. Schriber ◽

C. J. Saraceno ◽

F. Emaury ◽

M. Golling ◽

K. Beil ◽

...

Keyword(s):

Pulse Duration ◽

Output Power ◽

Average Output Power ◽

Short Pulse ◽

Thin Disk ◽

Average Output ◽

Short Pulse Duration

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Amplitude and frequency stability of a diode-pumped Nd:YAG laser operating at a single-frequency continuous-wave output power of 20 W

Optics Letters ◽

10.1364/ol.20.000462 ◽

1995 ◽

Vol 20 (5) ◽

pp. 462 ◽

Cited By ~ 41

Author(s):

I. Freitag ◽

D. Golla ◽

S. Knoke ◽

W. Schöne ◽

H. Zellmer ◽

...

Keyword(s):

Output Power ◽

Nd:Yag Laser ◽

Continuous Wave ◽

Frequency Stability ◽

Single Frequency ◽

Continuous Wave Output Power ◽

Diode Pumped ◽

Diode Pumped Nd:Yag Laser

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A 2.5GHZ-2.7GHz Unsymmetrical Doherty Power Amplifier with Digital Predistortion for LTE-Advanced Applications

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.760-762.546 ◽

2013 ◽

Vol 760-762 ◽

pp. 546-550 ◽

Cited By ~ 1

Author(s):

Wen Sheng Pan ◽

Chuan Hui Ma ◽

Shi Hai Shao ◽

You Xi Tang

Keyword(s):

Output Power ◽

Power Amplifier ◽

Power Efficiency ◽

Continuous Wave ◽

Digital Predistortion ◽

Average Output ◽

Lte Advanced ◽

Saturation Power ◽

Doherty Power Amplifier ◽

Better Than

An unsymmetrical GaN based Doherty power amplifier (DPA) operating from 2.5GHz to 2.7GHz is presented in this paper. To achieve a good tradeoff among the output power, efficiency and bandwidth, the ladder-type multisection output matching networks are optimized for the carrier amplifier and the peaking amplifier, respectively. Measured with continuous wave (CW) signal, the broadband DPA provides more than 49dBm saturation power in the operating band. The drain efficiency is greater than 44% over 7dB back-off power. For a LTE-Advanced signal with 100MHz bandwidth, the drain efficiency is higher than 42% at an average output power of 41dBm, along with an adjacent channel leakage ratio (ACLR) of better than-49.9dBc after digital predistortion (DPD).

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