7 W Diode-End-Pumped PLD-Grown Yb:Lu2O3 Planar Waveguide Laser

Parsonage, Tina L.; Beecher, Stephen J.; Choudhary, Amol; Grant-Jacob, James; Hua, Ping-Rang; Mackenzie, Jacob I.; Shepherd, D.P.; Eason, R.W.

doi:10.1364/assl.2015.aw1a.6

Cited by 1 publication

(2 citation statements)

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“…Applying ion beam etching or diamond dicing, ridge waveguides could be prepared from the planar samples to benefit from the advantages of two dimensional confinement such as a better overlap of pump and laser mode . Thicker films could enable power scaling of Nd:sapphire in thin disk configuration or by direct end pumping of planar waveguides with diode bars . As laser action of rare‐earth‐doped sapphire is now proven it is worthwhile to investigate other crystal growth techniques apart from thermal equilibrium such as micro‐pulling‐down at high growth rates .…”

Section: Discussionmentioning

confidence: 99%

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Lasing of Nd³⁺ in sapphire

Waeselmann

Heinrich

Kränkel

et al. 2016

Laser & Photonics Reviews

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We present a rare‐earth‐doped sapphire laser. Single‐crystalline α‐Al2O3 films doped with trivalent neodymium have been grown by pulsed laser deposition on undoped sapphire substrates. The Nd3+ doping concentrations of the films have been varied between 0.3 at.% and 2 at.%. Epitaxial growth was proven by structural and optical characterization of the films. The samples exhibit strongly polarization dependent emission transitions from the 4F3/2 manifold with a fluorescence lifetime of 108 μs and peak emission cross sections of 1.1 × 10−18 cm2 around 1100 nm. Lasing at 1096.5 nm was achieved under Ti:sapphire‐pumping in a planar waveguide configuration with a maximum cw output power of 137 mW and a slope efficiency of 7.5% with respect to the incident pump power.

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Section: Discussionmentioning

confidence: 99%

“…However, up to now no reports on lasing obtained from RE:sapphire can be found. Nevertheless PLD has proven to be a versatile method to grow thin films capable for laser oscillation in waveguide configuration in well‐established materials such as garnets as well as emerging materials like sesquioxides .…”

Section: Introductionmentioning

confidence: 99%