Thermal effect of LD end-pumped Nd:YAG laser at 1319nm

Shihan Meng; Tianyuan Zang; Jianliang Jiang; Hengli Zhang

doi:10.1117/12.2691425

Thermal effect of LD end-pumped Nd:YAG laser at 1319nm

Shihan Meng, Tianyuan Zang, Jianliang Jiang, Hengli Zhang^*

^*Corresponding author for this work

Beijing University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The 1.3 μm laser source has a wide range of applications in the fields of sodium beacons, optical communication, image display and laser medicine. In the paper, we demonstrate a laser with an LD end-pumped Nd:YAG slab crystal hybrid cavity Innoslab structure. When the pump power is high, the thermal effect of the laser during oscillation has an impact on the stability of the resonant cavity and the quality of the beam. We demonstrate a finite element model of an Nd:YAG crystal by means of heat conduction theory and analyse the effect of the temperature distribution at the crystal end face and the pump spot width on the thermal effect of the crystal. Calculations show that the finer the pump spot, the more pronounced the thermal effect of the crystal. In the experiment, the Nd:YAG slab crystal was doped at a concentration of 1at%，and a mixing cavity is constructed with a concave spherical mirror of R1 = 1000 mm and a convex cylindrical mirror of R2 = 900 mm; the length of the cavity is 55 mm; a negative cylindrical lens of Rc = -100 mm is inserted in the cavity as a compensating mirror. Finally, the maximum output power in the resonant cavity without the compensating mirror was 46.9 W; with the addition of the compensating mirror the maximum output power was 40.5 W; the vertical beam quality was increased from 2.98 to 1.28.

Original language	English
Title of host publication	Eighteenth National Conference on Laser Technology and Optoelectronics
Editors	Weibiao Chen, Minghui Hong, Jianrong Qiu, Pu Wang, Jianqiang Zhu, Tiancai Zhang
Publisher	SPIE
ISBN (Electronic)	9781510668379
DOIs	https://doi.org/10.1117/12.2691425
Publication status	Published - 2023
Externally published	Yes
Event	18th National Conference on Laser Technology and Optoelectronics 2023 - Shanghai, China Duration: 10 Jun 2023 → 13 Jun 2023

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12792
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	18th National Conference on Laser Technology and Optoelectronics 2023
Country/Territory	China
City	Shanghai
Period	10/06/23 → 13/06/23

Keywords

1319nm
Innoslab
laser
thermal effect

Access to Document

10.1117/12.2691425

Cite this

Meng, S., Zang, T., Jiang, J., & Zhang, H. (2023). Thermal effect of LD end-pumped Nd:YAG laser at 1319nm. In W. Chen, M. Hong, J. Qiu, P. Wang, J. Zhu, & T. Zhang (Eds.), Eighteenth National Conference on Laser Technology and Optoelectronics Article 127921P (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12792). SPIE. https://doi.org/10.1117/12.2691425

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title = "Thermal effect of LD end-pumped Nd:YAG laser at 1319nm",

abstract = "The 1.3 μm laser source has a wide range of applications in the fields of sodium beacons, optical communication, image display and laser medicine. In the paper, we demonstrate a laser with an LD end-pumped Nd:YAG slab crystal hybrid cavity Innoslab structure. When the pump power is high, the thermal effect of the laser during oscillation has an impact on the stability of the resonant cavity and the quality of the beam. We demonstrate a finite element model of an Nd:YAG crystal by means of heat conduction theory and analyse the effect of the temperature distribution at the crystal end face and the pump spot width on the thermal effect of the crystal. Calculations show that the finer the pump spot, the more pronounced the thermal effect of the crystal. In the experiment, the Nd:YAG slab crystal was doped at a concentration of 1at%，and a mixing cavity is constructed with a concave spherical mirror of R1 = 1000 mm and a convex cylindrical mirror of R2 = 900 mm; the length of the cavity is 55 mm; a negative cylindrical lens of Rc = -100 mm is inserted in the cavity as a compensating mirror. Finally, the maximum output power in the resonant cavity without the compensating mirror was 46.9 W; with the addition of the compensating mirror the maximum output power was 40.5 W; the vertical beam quality was increased from 2.98 to 1.28.",

keywords = "1319nm, Innoslab, laser, thermal effect",

author = "Shihan Meng and Tianyuan Zang and Jianliang Jiang and Hengli Zhang",

note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; 18th National Conference on Laser Technology and Optoelectronics 2023 ; Conference date: 10-06-2023 Through 13-06-2023",

year = "2023",

doi = "10.1117/12.2691425",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Weibiao Chen and Minghui Hong and Jianrong Qiu and Pu Wang and Jianqiang Zhu and Tiancai Zhang",

booktitle = "Eighteenth National Conference on Laser Technology and Optoelectronics",

address = "United States",

}

Meng, S, Zang, T, Jiang, J & Zhang, H 2023, Thermal effect of LD end-pumped Nd:YAG laser at 1319nm. in W Chen, M Hong, J Qiu, P Wang, J Zhu & T Zhang (eds), Eighteenth National Conference on Laser Technology and Optoelectronics., 127921P, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12792, SPIE, 18th National Conference on Laser Technology and Optoelectronics 2023, Shanghai, China, 10/06/23. https://doi.org/10.1117/12.2691425

Thermal effect of LD end-pumped Nd:YAG laser at 1319nm. / Meng, Shihan; Zang, Tianyuan; Jiang, Jianliang et al.
Eighteenth National Conference on Laser Technology and Optoelectronics. ed. / Weibiao Chen; Minghui Hong; Jianrong Qiu; Pu Wang; Jianqiang Zhu; Tiancai Zhang. SPIE, 2023. 127921P (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12792).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Thermal effect of LD end-pumped Nd:YAG laser at 1319nm

AU - Meng, Shihan

AU - Zang, Tianyuan

AU - Jiang, Jianliang

AU - Zhang, Hengli

PY - 2023

Y1 - 2023

N2 - The 1.3 μm laser source has a wide range of applications in the fields of sodium beacons, optical communication, image display and laser medicine. In the paper, we demonstrate a laser with an LD end-pumped Nd:YAG slab crystal hybrid cavity Innoslab structure. When the pump power is high, the thermal effect of the laser during oscillation has an impact on the stability of the resonant cavity and the quality of the beam. We demonstrate a finite element model of an Nd:YAG crystal by means of heat conduction theory and analyse the effect of the temperature distribution at the crystal end face and the pump spot width on the thermal effect of the crystal. Calculations show that the finer the pump spot, the more pronounced the thermal effect of the crystal. In the experiment, the Nd:YAG slab crystal was doped at a concentration of 1at%，and a mixing cavity is constructed with a concave spherical mirror of R1 = 1000 mm and a convex cylindrical mirror of R2 = 900 mm; the length of the cavity is 55 mm; a negative cylindrical lens of Rc = -100 mm is inserted in the cavity as a compensating mirror. Finally, the maximum output power in the resonant cavity without the compensating mirror was 46.9 W; with the addition of the compensating mirror the maximum output power was 40.5 W; the vertical beam quality was increased from 2.98 to 1.28.

AB - The 1.3 μm laser source has a wide range of applications in the fields of sodium beacons, optical communication, image display and laser medicine. In the paper, we demonstrate a laser with an LD end-pumped Nd:YAG slab crystal hybrid cavity Innoslab structure. When the pump power is high, the thermal effect of the laser during oscillation has an impact on the stability of the resonant cavity and the quality of the beam. We demonstrate a finite element model of an Nd:YAG crystal by means of heat conduction theory and analyse the effect of the temperature distribution at the crystal end face and the pump spot width on the thermal effect of the crystal. Calculations show that the finer the pump spot, the more pronounced the thermal effect of the crystal. In the experiment, the Nd:YAG slab crystal was doped at a concentration of 1at%，and a mixing cavity is constructed with a concave spherical mirror of R1 = 1000 mm and a convex cylindrical mirror of R2 = 900 mm; the length of the cavity is 55 mm; a negative cylindrical lens of Rc = -100 mm is inserted in the cavity as a compensating mirror. Finally, the maximum output power in the resonant cavity without the compensating mirror was 46.9 W; with the addition of the compensating mirror the maximum output power was 40.5 W; the vertical beam quality was increased from 2.98 to 1.28.

KW - 1319nm

KW - Innoslab

KW - laser

KW - thermal effect

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U2 - 10.1117/12.2691425

DO - 10.1117/12.2691425

M3 - Conference contribution

AN - SCOPUS:85176277858

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Eighteenth National Conference on Laser Technology and Optoelectronics

A2 - Chen, Weibiao

A2 - Hong, Minghui

A2 - Qiu, Jianrong

A2 - Wang, Pu

A2 - Zhu, Jianqiang

A2 - Zhang, Tiancai

PB - SPIE

T2 - 18th National Conference on Laser Technology and Optoelectronics 2023

Y2 - 10 June 2023 through 13 June 2023

ER -

Thermal effect of LD end-pumped Nd:YAG laser at 1319nm

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