Alkaline aluminum phosphate glasses for thermal ion-exchanged optical waveguide

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)484-490
Journal / PublicationOptical Materials
Volume42
Online published21 Feb 2015
Publication statusPublished - Apr 2015

Abstract

Alkaline aluminum phosphate glasses (NMAP) with excellent chemical durability for thermal ion-exchanged optical waveguide have been designed and investigated. The transition temperature Tg (470 °C) is higher than the ion-exchange temperature (390 °C), which is favorable to sustain the stability of the glass structure for planar waveguide fabrication. The effective diffusion coefficient De of K+-Na+ ion exchange in NMAP glasses is 0.110 μm2/min, indicating that ion exchange can be achieved efficiently in the optical glasses. Single-mode channel waveguide has been fabricated on Er3+/Yb3+ doped NMAP glass substrate by standard micro-fabrication and K+-Na+ ion exchange. The mode field diameter is 9.6 μm in the horizontal direction and 6.0 μm in the vertical direction, respectively, indicating an excellent overlap with a standard single-mode fiber. Judd-Ofelt intensity parameter Ω2 is 5.47 × 10-20 cm2, implying a strong asymmetrical and covalent environment around Er3+ in the optical glasses. The full width at half maximum and maximum stimulated emission cross section of the 4I13/24I15/2 are 30 nm and 6.80 × 10-21 cm2, respectively, demonstrating that the phosphate glasses are potential glass candidates in developing compact optoelectronic devices. Pr3+, Tm3+ and Ho3+ doped NMAP glasses are promising candidates to fabricate waveguide amplifiers and lasers operating at special telecommunication windows.

Research Area(s)

  • Glass waveguide material, Phosphate glass, Thermal ion exchange, Waveguide fabrication

Citation Format(s)

Alkaline aluminum phosphate glasses for thermal ion-exchanged optical waveguide. / Wang, Fei; Chen, Baojie; Pun, Edwin Yue Bun et al.
In: Optical Materials, Vol. 42, 04.2015, p. 484-490.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review