Passively Q-switched diode pumped Nd:YAG, Nd:YVO4 and Nd:GdVO4 using (Cr4+,Ca2+):YAG and (Cr 4+,Mg2+):YAG saturable absorbers

Yehoshua Kalisky; O. Kalisky; Milan R. Kokta

doi:10.1117/12.763616

Passively Q-switched diode pumped Nd:YAG, Nd:YVO₄ and Nd:GdVO₄ using (Cr⁴⁺,Ca²⁺):YAG and (Cr ⁴⁺,Mg²⁺):YAG saturable absorbers

Yehoshua Kalisky, O. Kalisky, Milan R. Kokta

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

Abstract

We report the operation of passively Q-switched diode-end-pumped Nd: YAG and Nd: YVO₄ lasers by employing Cr⁴⁺doped garnets with Ca²⁺ or Mg²⁺ as charge compensators. We found that the laser performance improved significantly, mainly in the Nd:YVO₄ system when (Cr⁴⁺, Mg²⁺):YAG sample was used as a passive Q-switching. For example, in the Nd:YVO₄ and Nd: YAG lasers, the maximum peak power using (Cr⁴⁺,Mg²⁺):YAG saturable absorber was higher by a factor of 8.5 and 2.6, respectively, relative to (Cr⁴⁺,Ca²⁺):YAG. This fact is attributed to better optical quality of the (Cr⁴⁺Mg²⁺):YAG sample, as a result of improved dopant distribution and reduced internal stresses inside the saturable absorber crystals. Similar passively Q-switched laser performance can be obtained by using other garnets with an open structure, and hence, with low internal stresses, such as (C^r4+, Ca²⁺):GGG. We also compared the laser performance of Nd: GdVO₄ with the same saturable absorbers and obtained both passive Q-switching and passive mode locking. By using an analytical model with the relevant physical parameters of the laser crystals and saturable absorbers it is possible to optimize the laser performance.

Original language	English
Title of host publication	Nonlinear Frequency Generation and Conversion
Subtitle of host publication	Materials, Devices, and Applications VII
DOIs	https://doi.org/10.1117/12.763616
State	Published - 13 Jun 2008
Externally published	Yes
Event	Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII - San Jose, CA, United States Duration: 22 Jan 2008 → 24 Jan 2008

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6875
ISSN (Print)	0277-786X

Conference

Conference	Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII
Country/Territory	United States
City	San Jose, CA
Period	22/01/08 → 24/01/08

Keywords

Diode-pumped lasers
Nd-doped vanadate lasers
Nd:YAG
Saturable absorber

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.763616

Cite this

Kalisky, Y., Kalisky, O., & Kokta, M. R. (2008). Passively Q-switched diode pumped Nd:YAG, Nd:YVO₄ and Nd:GdVO₄ using (Cr⁴⁺,Ca²⁺):YAG and (Cr ⁴⁺,Mg²⁺):YAG saturable absorbers. In Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII Article 687511 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6875). https://doi.org/10.1117/12.763616

@inproceedings{e4511a629c7c486bbc70e33403325c14,

title = "Passively Q-switched diode pumped Nd:YAG, Nd:YVO4 and Nd:GdVO4 using (Cr4+,Ca2+):YAG and (Cr 4+,Mg2+):YAG saturable absorbers",

abstract = "We report the operation of passively Q-switched diode-end-pumped Nd: YAG and Nd: YVO4 lasers by employing Cr4+doped garnets with Ca2+ or Mg2+ as charge compensators. We found that the laser performance improved significantly, mainly in the Nd:YVO4 system when (Cr4+, Mg2+):YAG sample was used as a passive Q-switching. For example, in the Nd:YVO4 and Nd: YAG lasers, the maximum peak power using (Cr4+,Mg2+):YAG saturable absorber was higher by a factor of 8.5 and 2.6, respectively, relative to (Cr4+,Ca2+):YAG. This fact is attributed to better optical quality of the (Cr4+Mg2+):YAG sample, as a result of improved dopant distribution and reduced internal stresses inside the saturable absorber crystals. Similar passively Q-switched laser performance can be obtained by using other garnets with an open structure, and hence, with low internal stresses, such as (Cr4+, Ca2+):GGG. We also compared the laser performance of Nd: GdVO4 with the same saturable absorbers and obtained both passive Q-switching and passive mode locking. By using an analytical model with the relevant physical parameters of the laser crystals and saturable absorbers it is possible to optimize the laser performance.",

keywords = "Diode-pumped lasers, Nd-doped vanadate lasers, Nd:YAG, Saturable absorber",

author = "Yehoshua Kalisky and O. Kalisky and Kokta, {Milan R.}",

year = "2008",

month = jun,

day = "13",

doi = "10.1117/12.763616",

language = "English",

isbn = "9780819470508",

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

booktitle = "Nonlinear Frequency Generation and Conversion",

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Kalisky, Y, Kalisky, O & Kokta, MR 2008, Passively Q-switched diode pumped Nd:YAG, Nd:YVO₄ and Nd:GdVO₄ using (Cr⁴⁺,Ca²⁺):YAG and (Cr ⁴⁺,Mg²⁺):YAG saturable absorbers. in Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII., 687511, Proceedings of SPIE - The International Society for Optical Engineering, vol. 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, San Jose, CA, United States, 22/01/08. https://doi.org/10.1117/12.763616

Passively Q-switched diode pumped Nd:YAG, Nd:YVO₄ and Nd:GdVO₄ using (Cr⁴⁺,Ca²⁺):YAG and (Cr ⁴⁺,Mg²⁺):YAG saturable absorbers. / Kalisky, Yehoshua; Kalisky, O.; Kokta, Milan R.
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII. 2008. 687511 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6875).

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

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T1 - Passively Q-switched diode pumped Nd:YAG, Nd:YVO4 and Nd:GdVO4 using (Cr4+,Ca2+):YAG and (Cr 4+,Mg2+):YAG saturable absorbers

AU - Kalisky, Yehoshua

AU - Kalisky, O.

AU - Kokta, Milan R.

PY - 2008/6/13

Y1 - 2008/6/13

N2 - We report the operation of passively Q-switched diode-end-pumped Nd: YAG and Nd: YVO4 lasers by employing Cr4+doped garnets with Ca2+ or Mg2+ as charge compensators. We found that the laser performance improved significantly, mainly in the Nd:YVO4 system when (Cr4+, Mg2+):YAG sample was used as a passive Q-switching. For example, in the Nd:YVO4 and Nd: YAG lasers, the maximum peak power using (Cr4+,Mg2+):YAG saturable absorber was higher by a factor of 8.5 and 2.6, respectively, relative to (Cr4+,Ca2+):YAG. This fact is attributed to better optical quality of the (Cr4+Mg2+):YAG sample, as a result of improved dopant distribution and reduced internal stresses inside the saturable absorber crystals. Similar passively Q-switched laser performance can be obtained by using other garnets with an open structure, and hence, with low internal stresses, such as (Cr4+, Ca2+):GGG. We also compared the laser performance of Nd: GdVO4 with the same saturable absorbers and obtained both passive Q-switching and passive mode locking. By using an analytical model with the relevant physical parameters of the laser crystals and saturable absorbers it is possible to optimize the laser performance.

AB - We report the operation of passively Q-switched diode-end-pumped Nd: YAG and Nd: YVO4 lasers by employing Cr4+doped garnets with Ca2+ or Mg2+ as charge compensators. We found that the laser performance improved significantly, mainly in the Nd:YVO4 system when (Cr4+, Mg2+):YAG sample was used as a passive Q-switching. For example, in the Nd:YVO4 and Nd: YAG lasers, the maximum peak power using (Cr4+,Mg2+):YAG saturable absorber was higher by a factor of 8.5 and 2.6, respectively, relative to (Cr4+,Ca2+):YAG. This fact is attributed to better optical quality of the (Cr4+Mg2+):YAG sample, as a result of improved dopant distribution and reduced internal stresses inside the saturable absorber crystals. Similar passively Q-switched laser performance can be obtained by using other garnets with an open structure, and hence, with low internal stresses, such as (Cr4+, Ca2+):GGG. We also compared the laser performance of Nd: GdVO4 with the same saturable absorbers and obtained both passive Q-switching and passive mode locking. By using an analytical model with the relevant physical parameters of the laser crystals and saturable absorbers it is possible to optimize the laser performance.

KW - Diode-pumped lasers

KW - Nd-doped vanadate lasers

KW - Nd:YAG

KW - Saturable absorber

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