A comparative analysis of Rb:KTP and Cs:KTP optical waveguides

Abstract

Planar optical waveguides were produced by exchange of for of Z-cut (KTP). The results of a systematic study of Rb:KTP and Cs:KTP waveguides obtained by combining measurements of the mode propagation constants, optical profiles and Raman scattering spectra are reported. The analysis of the refractive index profiles has shown that there is an exponential distribution in the exchanged layers. Some dependences of the waveguide characteristics on the fabrication conditions are presented. Micro-Raman spectra have revealed a notable difference compared with the spectra of pure KTP in the range of external lattice modes as well as in the range of torsional vibrations of octahedra. The exchanged layers exhibit lower perfection of the crystal lattice than that of pure KTP and effects of symmetry changes.

Structure evolution and photoluminescence of Lu3(Al,Mg)2(Al,Si)3O12:Ce3+ phosphors: new yellow-color converters for blue LED-driven solid state lighting

“…15 In modern photonic technology, doping at, for example, the cation site, is widely used for tuning the structural, linear and nonlinear optical, ferroelectric and other physical property of functional crystals. [16][17][18] One doping element, as a rule, is applied to doping and the expected solid solution property can be speculated over the solubility range by different empirical relations. When two doping elements with different ion charge and radius are taken, the situation becomes more complicated and the solid solution behavior is less predictable, because, in many cases, the doping ion distribution over the crystallographic sites and the defect formation mechanism is unclear.…”

Preparation and structural properties of nonlinear optical borates K2(1−x)Rb2xAl2B2O7, 0<x<0.75

“…However, to have a wide solid solution range without drastic defect generation and optical quality degradation, it is desirable for the end parent crystals to be isostructural [11][12][13][14][15]. As to KABO, a search for structural analogs was implemented in the past because the isovalent element substitution seems to be possible in * Corresponding author.…”

MeV He ion-implanted planar waveguide in RTP crystal

“…Planar waveguides in KTP have been produced by several methods, e.g., ion exchange [5], ion implantation [6][7][8], and pulsed laser deposition (PLD) [9]. But little work was reported about the RTP waveguides.…”