Active Q-switch Tm:YLF based on electro-optic KLTN

Rotem Nahear; Yehuda Vidal; Salman Noach; Aharon J. Agranat

doi:10.1117/12.2548025

Active Q-switch Tm:YLF based on electro-optic KLTN

Rotem Nahear, Yehuda Vidal, Salman Noach, Aharon J. Agranat

The Institute of Applied Physics

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

6 Scopus citations

Abstract

Electro-optic active Q-switching in a Tm:YLF laser operating at 1.88 μm is demonstrated using a potassium lithium tantalate niobate (KLTN) crystal as the electro-optic medium. Upon approaching the ferroelectric phase transition temperature, KLTN manifests an exceptionally strong quadratic electro-optic effect. Operation with low driving voltages of 550V on a 3 mm wide and 2mm long crystal were demonstrated. Pulse energy of 1.4 mJ with 17 ns pulse duration was obtained at 1 kHz repetition rate with 9.5W incident pump power. A special trapezoidal configuration of the KLTN crystal was used in order to suppress the acousto-optic oscillations that are generated due to the strong electrostriction manifested in KLTN close to the phase transition temperature which lead to strong instabilities in the laser performance. New EO Q switching mechanism was implemented, in which the resonator gain rather than the loss was shifted between two levels by exploiting the different gain of the Tm:YLF crystal in the ï3 and ï polarizations. This obviated the need for inserting a polarizer in the laser cavity, and allowed the shortening of the laser cavity.

Original language	English
Title of host publication	Solid State Lasers XXIX
Subtitle of host publication	Technology and Devices
Editors	W. Andrew Clarkson, Ramesh K. Shori
Publisher	SPIE
ISBN (Electronic)	9781510632813
DOIs	https://doi.org/10.1117/12.2548025
State	Published - 2020
Event	Solid State Lasers XXIX: Technology and Devices 2020 - San Francisco, United States Duration: 4 Feb 2020 → 6 Feb 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11259
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Solid State Lasers XXIX: Technology and Devices 2020
Country/Territory	United States
City	San Francisco
Period	4/02/20 → 6/02/20

Bibliographical note

Publisher Copyright:
© 2020 SPIE.

Keywords

Active Q switch
Electro optics
SWIR lasers

Access to Document

10.1117/12.2548025

Cite this

@inproceedings{7a69583f5023451aa49105d76fd2e1fd,

title = "Active Q-switch Tm:YLF based on electro-optic KLTN",

abstract = "Electro-optic active Q-switching in a Tm:YLF laser operating at 1.88 μm is demonstrated using a potassium lithium tantalate niobate (KLTN) crystal as the electro-optic medium. Upon approaching the ferroelectric phase transition temperature, KLTN manifests an exceptionally strong quadratic electro-optic effect. Operation with low driving voltages of 550V on a 3 mm wide and 2mm long crystal were demonstrated. Pulse energy of 1.4 mJ with 17 ns pulse duration was obtained at 1 kHz repetition rate with 9.5W incident pump power. A special trapezoidal configuration of the KLTN crystal was used in order to suppress the acousto-optic oscillations that are generated due to the strong electrostriction manifested in KLTN close to the phase transition temperature which lead to strong instabilities in the laser performance. New EO Q switching mechanism was implemented, in which the resonator gain rather than the loss was shifted between two levels by exploiting the different gain of the Tm:YLF crystal in the {\"i}3 and {\"i} polarizations. This obviated the need for inserting a polarizer in the laser cavity, and allowed the shortening of the laser cavity.",

keywords = "Active Q switch, Electro optics, SWIR lasers",

author = "Rotem Nahear and Yehuda Vidal and Salman Noach and Agranat, {Aharon J.}",

note = "Publisher Copyright: {\textcopyright} 2020 SPIE.; Solid State Lasers XXIX: Technology and Devices 2020 ; Conference date: 04-02-2020 Through 06-02-2020",

year = "2020",

doi = "10.1117/12.2548025",

language = "אנגלית",

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

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Nahear, R, Vidal, Y, Noach, S & Agranat, AJ 2020, Active Q-switch Tm:YLF based on electro-optic KLTN. in WA Clarkson & RK Shori (eds), Solid State Lasers XXIX: Technology and Devices., 112590X, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11259, SPIE, Solid State Lasers XXIX: Technology and Devices 2020, San Francisco, United States, 4/02/20. https://doi.org/10.1117/12.2548025

Active Q-switch Tm:YLF based on electro-optic KLTN. / Nahear, Rotem; Vidal, Yehuda; Noach, Salman et al.
Solid State Lasers XXIX: Technology and Devices. ed. / W. Andrew Clarkson; Ramesh K. Shori. SPIE, 2020. 112590X (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11259).

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

TY - GEN

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AU - Nahear, Rotem

AU - Vidal, Yehuda

AU - Noach, Salman

AU - Agranat, Aharon J.

PY - 2020

Y1 - 2020

N2 - Electro-optic active Q-switching in a Tm:YLF laser operating at 1.88 μm is demonstrated using a potassium lithium tantalate niobate (KLTN) crystal as the electro-optic medium. Upon approaching the ferroelectric phase transition temperature, KLTN manifests an exceptionally strong quadratic electro-optic effect. Operation with low driving voltages of 550V on a 3 mm wide and 2mm long crystal were demonstrated. Pulse energy of 1.4 mJ with 17 ns pulse duration was obtained at 1 kHz repetition rate with 9.5W incident pump power. A special trapezoidal configuration of the KLTN crystal was used in order to suppress the acousto-optic oscillations that are generated due to the strong electrostriction manifested in KLTN close to the phase transition temperature which lead to strong instabilities in the laser performance. New EO Q switching mechanism was implemented, in which the resonator gain rather than the loss was shifted between two levels by exploiting the different gain of the Tm:YLF crystal in the ï3 and ï polarizations. This obviated the need for inserting a polarizer in the laser cavity, and allowed the shortening of the laser cavity.

AB - Electro-optic active Q-switching in a Tm:YLF laser operating at 1.88 μm is demonstrated using a potassium lithium tantalate niobate (KLTN) crystal as the electro-optic medium. Upon approaching the ferroelectric phase transition temperature, KLTN manifests an exceptionally strong quadratic electro-optic effect. Operation with low driving voltages of 550V on a 3 mm wide and 2mm long crystal were demonstrated. Pulse energy of 1.4 mJ with 17 ns pulse duration was obtained at 1 kHz repetition rate with 9.5W incident pump power. A special trapezoidal configuration of the KLTN crystal was used in order to suppress the acousto-optic oscillations that are generated due to the strong electrostriction manifested in KLTN close to the phase transition temperature which lead to strong instabilities in the laser performance. New EO Q switching mechanism was implemented, in which the resonator gain rather than the loss was shifted between two levels by exploiting the different gain of the Tm:YLF crystal in the ï3 and ï polarizations. This obviated the need for inserting a polarizer in the laser cavity, and allowed the shortening of the laser cavity.

KW - Active Q switch

KW - Electro optics

KW - SWIR lasers

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PB - SPIE

T2 - Solid State Lasers XXIX: Technology and Devices 2020

Y2 - 4 February 2020 through 6 February 2020

ER -

Active Q-switch Tm:YLF based on electro-optic KLTN

Abstract

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Keywords

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