Spectroscopic and second harmonic generation properties of a new crystal: Yb-doped RbTiOPO4

Efficient second harmonic generation green light in RTP planar waveguides

“…On the other hand the Type II Second Harmonic Generation experiments in the waveguide show an efficiency of 69 %/mWcm 2 , showing that these composites are able to converse the fundamental infrared emission of Yb 3+ with high efficiency. effective refractive index, n eff…”

“…The doping of RTP with laser active ions as Ln 3+ (lanthanides) ions is accompanied by a low concentration of the doping ion. This concentration can be increased by codoping with Nb 5+ [2]. Among the Ln 3+ ions, Yb 3+ has special interest due to its emission at around 1 μm and its simple energy level scheme, with only two energy levels: the fundamental 2 F 7/2 and an excited state 2 F 5/2 .…”

Growth, structural, thermal, electrical and nonlinear optical properties of Yb3+ doped KTiOPO4

“…Rare earth ions can influence the physical and optical properties in KTP and its isomorphs. Lanthanides have specific absorption bands in the near-ultraviolet, visible regions and lower ionic charges than Ti 4 þ which provides an anomalous dispersion and reduces the ionic conductivity [7][8][9]. The self frequency doubling is possible by doping rare earth elements in KTP.…”

Laser operation of Yb³⁺ in the acentric RbTiOPO<inf>4</inf> crystal codoped with Nb⁵⁺

“…However, on the basis of charge compensation and co-doping with Nb5+, RTP:Nb crystals were successfully doped with Yb up to a concentration of 2x 1020 cm-3 (2.2 at. 0 o) [1].…”

“…

The new bifunctional crystal, Yb-doped RbTiOPO4 or Yb:RTP, codoped with Nb for charge compensation, combines the lasing properties of the Yb-ion with the nonlinear properties of the well-known orthorhombic crystal RTP [1]. It is interesting for the development of compact all-solid-state laser sources in the green, by self-frequency doubling.

…”