Carbon nanotube Q-switched Yb:KLuW surface channel waveguide lasers

Ji Eun Bae; Tae Gwan Park; Esrom Kifle; Xavier Mateos; Magdalena Aguiló; Francesc Díaz; Carolina Romero; Javier Rodriguez Vázquez De Aldana; Hansuek Lee; Fabian Rotermund

doi:10.1364/OL.45.000216

Carbon nanotube Q-switched Yb:KLuW surface channel waveguide lasers

Ji Eun Bae, Tae Gwan Park, Esrom Kifle, Xavier Mateos, Magdalena Aguiló, Francesc Díaz, Carolina Romero, Javier Rodriguez Vázquez De Aldana, Hansuek Lee, Fabian Rotermund

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A channel waveguide (WG) buried immediately below the surface of a Yb:KLuW crystal is used as a laser gain medium for passive Q-switching by both evanescent- and direct-field interactions with single-walled carbon nanotubes (SWCNTs) near 1040 nm. The SWCNTs used as saturable absorbers (SAs) are deposited on top of the half-ring-type channel WG fabricated via femtosecond direct laser writing. The Q-switched WG laser delivers 88.5 ns pulses at a 1.16 MHz repetition rate with a maximum average output power of 680 mW. For the two different interaction schemes with SWCNT-SAs, the pulse characteristics, depending on the output coupling ratio and absorbed pump power, are experimentally investigated and compared to the results of theoretical analyses of the SA Q-switched operation.

Original language	English
Pages (from-to)	216-219
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	1
DOIs	https://doi.org/10.1364/OL.45.000216
State	Published - Jan 1 2020
Externally published	Yes

Funding

Funding. National Research Foundation of Korea (2017R1A4A1015426, 2018H1A2A1061480); Spanish Government (FIS2017-87970-R, MAT2016-75716-C2-1-R (AEI/FEDER, UE)); Junta de Castilla y León (SA287P18); Generalitat de Catalunya (2017SGR755). National Research Foundation of Korea (2017R1A4A1015426, 2018H1A2A1061480); Spanish Government (FIS2017-87970-R, MAT2016-75716-C2-1-R (AEI/FEDER, UE)); Junta de Castilla y León (SA287P18); GeneralitatdeCatalunya (2017SGR755).

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10.1364/OL.45.000216

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title = "Carbon nanotube Q-switched Yb:KLuW surface channel waveguide lasers",

abstract = "A channel waveguide (WG) buried immediately below the surface of a Yb:KLuW crystal is used as a laser gain medium for passive Q-switching by both evanescent- and direct-field interactions with single-walled carbon nanotubes (SWCNTs) near 1040 nm. The SWCNTs used as saturable absorbers (SAs) are deposited on top of the half-ring-type channel WG fabricated via femtosecond direct laser writing. The Q-switched WG laser delivers 88.5 ns pulses at a 1.16 MHz repetition rate with a maximum average output power of 680 mW. For the two different interaction schemes with SWCNT-SAs, the pulse characteristics, depending on the output coupling ratio and absorbed pump power, are experimentally investigated and compared to the results of theoretical analyses of the SA Q-switched operation.",

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AU - Bae, Ji Eun

AU - Park, Tae Gwan

AU - Kifle, Esrom

AU - Mateos, Xavier

AU - Aguiló, Magdalena

AU - Díaz, Francesc

AU - Romero, Carolina

AU - De Aldana, Javier Rodriguez Vázquez

AU - Lee, Hansuek

AU - Rotermund, Fabian

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AB - A channel waveguide (WG) buried immediately below the surface of a Yb:KLuW crystal is used as a laser gain medium for passive Q-switching by both evanescent- and direct-field interactions with single-walled carbon nanotubes (SWCNTs) near 1040 nm. The SWCNTs used as saturable absorbers (SAs) are deposited on top of the half-ring-type channel WG fabricated via femtosecond direct laser writing. The Q-switched WG laser delivers 88.5 ns pulses at a 1.16 MHz repetition rate with a maximum average output power of 680 mW. For the two different interaction schemes with SWCNT-SAs, the pulse characteristics, depending on the output coupling ratio and absorbed pump power, are experimentally investigated and compared to the results of theoretical analyses of the SA Q-switched operation.

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Carbon nanotube Q-switched Yb:KLuW surface channel waveguide lasers

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