Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2

P. Loiko; S.J. Yoon; J.M. Serres; X Mateos; S.J. Beecher; R.B. Birch; V.G. Savitski; A.J. Kemp; K. Yumashev; U. Griebner; V. Petrov; M. Aguiló; F. Diaz; J.I. Mackenzie

doi:10.1016/j.optmat.2016.06.005

Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2

P. Loiko, S.J. Yoon, J.M. Serres, X Mateos, S.J. Beecher, R.B. Birch, V.G. Savitski, A.J. Kemp, K. Yumashev, U. Griebner, V. Petrov, M. Aguiló, F. Diaz, J.I. Mackenzie

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

13 Citations (Scopus)

95 Downloads (Pure)

Abstract

High-resolution absorption and stimulated-emission cross-section spectra are presented for monoclinic Nd:KGd(WO4)2 (Nd:KGW) laser crystals in the temperature range 77–450 K. At room-temperature, the maximum stimulated emission cross-section is σSE = 21.4 × 10−20 cm2 at 1067.3 nm, for light polarization E || Nm. The lifetime of the 4F3/2 state of Nd3+ in KGW is practically temperature independent at 115 ± 5 μs. Measurement of the energy transfer upconversion parameter for a 3 at.% Nd:KGW crystal proved that this was significantly smaller than for alternative hosts, ∼2.5 × 10−17 cm3/s. When cut along the Ng optical indicatrix axis, the Nd:KGW crystal was configured as a microchip laser, generating ∼4 W of continuous-wave output at 1067 nm with a slope efficiency of 61% under diode-pumping. Using a highly-doped (10 at.%) Nd:KGW crystal, the slope efficiency reached 71% and 74% when pumped with a laser diode and a Ti:Sapphire laser, respectively. The concept of an ultrathin (250 μm) Nd:KGW microchip laser sandwiched between two synthetic diamond heat-spreaders is demonstrated.

Original language	English
Pages (from-to)	365-372
Number of pages	8
Journal	Optical Materials
Volume	58
Early online date	11 Jun 2016
DOIs	https://doi.org/10.1016/j.optmat.2016.06.005
Publication status	E-pub ahead of print - 11 Jun 2016

Keywords

double tungstate
neodymium
microchip laser
diamond
luminescence

Access to Document

10.1016/j.optmat.2016.06.005

Loiko-etal-OM-2016-Temperature-dependent-spectroscopy-and-microchipAccepted author manuscript, 981 KBLicence: CC BY-NC-ND 4.0

Cite this

Loiko, P., Yoon, S. J., Serres, J. M., Mateos, X., Beecher, S. J., Birch, R. B., Savitski, V. G., Kemp, A. J., Yumashev, K., Griebner, U., Petrov, V., Aguiló, M., Diaz, F., & Mackenzie, J. I. (2016). Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2. Optical Materials, 58, 365-372. Advance online publication. https://doi.org/10.1016/j.optmat.2016.06.005

@article{1dd5db0b34444ccfa52820e7d193f8fa,

title = "Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2",

abstract = "High-resolution absorption and stimulated-emission cross-section spectra are presented for monoclinic Nd:KGd(WO4)2 (Nd:KGW) laser crystals in the temperature range 77–450 K. At room-temperature, the maximum stimulated emission cross-section is σSE = 21.4 × 10−20 cm2 at 1067.3 nm, for light polarization E || Nm. The lifetime of the 4F3/2 state of Nd3+ in KGW is practically temperature independent at 115 ± 5 μs. Measurement of the energy transfer upconversion parameter for a 3 at.% Nd:KGW crystal proved that this was significantly smaller than for alternative hosts, ∼2.5 × 10−17 cm3/s. When cut along the Ng optical indicatrix axis, the Nd:KGW crystal was configured as a microchip laser, generating ∼4 W of continuous-wave output at 1067 nm with a slope efficiency of 61% under diode-pumping. Using a highly-doped (10 at.%) Nd:KGW crystal, the slope efficiency reached 71% and 74% when pumped with a laser diode and a Ti:Sapphire laser, respectively. The concept of an ultrathin (250 μm) Nd:KGW microchip laser sandwiched between two synthetic diamond heat-spreaders is demonstrated.",

keywords = "double tungstate, neodymium, microchip laser, diamond, luminescence",

author = "P. Loiko and S.J. Yoon and J.M. Serres and X Mateos and S.J. Beecher and R.B. Birch and V.G. Savitski and A.J. Kemp and K. Yumashev and U. Griebner and V. Petrov and M. Aguil{\'o} and F. Diaz and J.I. Mackenzie",

year = "2016",

month = jun,

day = "11",

doi = "10.1016/j.optmat.2016.06.005",

language = "English",

volume = "58",

pages = "365--372",

journal = "Optical Materials",

issn = "0925-3467",

}

TY - JOUR

T1 - Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2

AU - Loiko, P.

AU - Yoon, S.J.

AU - Serres, J.M.

AU - Mateos, X

AU - Beecher, S.J.

AU - Birch, R.B.

AU - Savitski, V.G.

AU - Kemp, A.J.

AU - Yumashev, K.

AU - Griebner, U.

AU - Petrov, V.

AU - Aguiló, M.

AU - Diaz, F.

AU - Mackenzie, J.I.

PY - 2016/6/11

Y1 - 2016/6/11

N2 - High-resolution absorption and stimulated-emission cross-section spectra are presented for monoclinic Nd:KGd(WO4)2 (Nd:KGW) laser crystals in the temperature range 77–450 K. At room-temperature, the maximum stimulated emission cross-section is σSE = 21.4 × 10−20 cm2 at 1067.3 nm, for light polarization E || Nm. The lifetime of the 4F3/2 state of Nd3+ in KGW is practically temperature independent at 115 ± 5 μs. Measurement of the energy transfer upconversion parameter for a 3 at.% Nd:KGW crystal proved that this was significantly smaller than for alternative hosts, ∼2.5 × 10−17 cm3/s. When cut along the Ng optical indicatrix axis, the Nd:KGW crystal was configured as a microchip laser, generating ∼4 W of continuous-wave output at 1067 nm with a slope efficiency of 61% under diode-pumping. Using a highly-doped (10 at.%) Nd:KGW crystal, the slope efficiency reached 71% and 74% when pumped with a laser diode and a Ti:Sapphire laser, respectively. The concept of an ultrathin (250 μm) Nd:KGW microchip laser sandwiched between two synthetic diamond heat-spreaders is demonstrated.

AB - High-resolution absorption and stimulated-emission cross-section spectra are presented for monoclinic Nd:KGd(WO4)2 (Nd:KGW) laser crystals in the temperature range 77–450 K. At room-temperature, the maximum stimulated emission cross-section is σSE = 21.4 × 10−20 cm2 at 1067.3 nm, for light polarization E || Nm. The lifetime of the 4F3/2 state of Nd3+ in KGW is practically temperature independent at 115 ± 5 μs. Measurement of the energy transfer upconversion parameter for a 3 at.% Nd:KGW crystal proved that this was significantly smaller than for alternative hosts, ∼2.5 × 10−17 cm3/s. When cut along the Ng optical indicatrix axis, the Nd:KGW crystal was configured as a microchip laser, generating ∼4 W of continuous-wave output at 1067 nm with a slope efficiency of 61% under diode-pumping. Using a highly-doped (10 at.%) Nd:KGW crystal, the slope efficiency reached 71% and 74% when pumped with a laser diode and a Ti:Sapphire laser, respectively. The concept of an ultrathin (250 μm) Nd:KGW microchip laser sandwiched between two synthetic diamond heat-spreaders is demonstrated.

KW - double tungstate

KW - neodymium

KW - microchip laser

KW - diamond

KW - luminescence

UR - http://www.sciencedirect.com/science/article/pii/S0925346716302993

U2 - 10.1016/j.optmat.2016.06.005

DO - 10.1016/j.optmat.2016.06.005

M3 - Article

SN - 0925-3467

VL - 58

SP - 365

EP - 372

JO - Optical Materials

JF - Optical Materials

ER -

Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

RAEng/Fraunhofer Research Chair in Advanced Laser Engineering

DIAL (Diamond Lasers: Revolutionising Laser Engineering) - ERC Starting Grant)