Graphene Q-switched Tb:LiYF<sub>4</sub> green laser

H. Chen; H. Chen; W. Yao; H. Uehara; H. Uehara; R. Yasuhara; R. Yasuhara

doi:10.1364/OL.391746

Optics Letters
Vol. 45,
Issue 9,
pp. 2596-2599
(2020)
•https://doi.org/10.1364/OL.391746

Graphene Q-switched Tb:LiYF₄ green laser

H. Chen, W. Yao, H. Uehara, and R. Yasuhara

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H. Chen, W. Yao, H. Uehara, and R. Yasuhara, "Graphene Q-switched Tb:LiYF₄ green laser," Opt. Lett. 45, 2596-2599 (2020)

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Abstract

We report the ${Q}$-switched operation of a ${{\rm Tb}^{3 + }}$-laser for the first time, to the best of our knowledge. The passive${\!\!Q}$-switching was realized by a 15% ${\rm Tb}{:}{\rm LiYF}_4$ gain medium and a single-layer graphene saturable absorber. An average output power of 744 mW at 544 nm was achieved with slope efficiency of 41%, pulse width of 2.9 µs, and repetition rate of 38.7 kHz. The corresponding pulse energy and peak power were calculated to be 19.2 µJ and 6.6 W, respectively.

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Laser System	$λ_{l a s e r}$ (nm)	$η_{o p t .}$ (%)	$E_{p u l s e}$ (µJ)	$t_{w}$ (ns)	$P_{p e a k}$ (W)	Refs.
$T b : {L i Y F}_{4} /$ $s - G$	544	26.7	19.2	2900	6.6	This work
$N d : {Y V O}_{4} /$ $s - G / K T P$	532	4.9	2.32	202	11.5	[18]
$N d : Y A G /$ ${C r}^{4 +} : Y A G / K T P$	532	17.8	18	3.5	5300	[20]
$N d : {Y V O}_{4} /$ ${C r}^{4 +} : Y A G / K T P$	532	6.3	35	111	315	[21]
$N d : {G d V O}_{4} /$ ${C r}^{4 +} : Y A G / K T P$	532	6.7	21	30	696	[22]
$Y b : Y A G /$ ${C r}^{4 +} : Y A G / L B O$	515/525	10.3	246	5.54	40.8	[23]
$P r : {L i Y F}_{4} /$ ${C o}^{2 +} : {M g A l}_{2} O_{4}$	523	14.3	3.5	205	16.6	[24]

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