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Proceedings Paper

Laser action in ion-exchanged waveguides fabricated on Er-Yb-doped phosphate glasses using planar technology
Author(s): Gino Sorbello; Stefano Taccheo; Roberta Ramponi; Vittorio Foglietti; Shibin Jiang; Nasser Peyghambarian; Paolo Laporta
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Paper Abstract

Waveguide laser arrays operating at 1.5 micrometers have been fabricated on Er:Yb-doped glass substrates by a two-step silver-sodium ion-exchange process based on thermal diffusion followed by a field-assisted burial step. The fabrication parameters have been optimized to achieve low propagation losses and good mode matching between waveguide channels and standard single-mode output fibers. Each laser cavity is formed by two Bragg gratings butt-coupled to the two ends of the channel waveguide. Fiber-coupled output power in excess of 10 mW is readily available from a single channel, when pumped from both sides by two 980-nm laser diodes providing a maximum power of ~300 mW. Single-longitudinal mode operation with output power of the order of 1 mW has been achieved using narrow reflectivity band (<30 GHz) Bragg gratings with different laser configurations. The laser operating wavelength can be selected across the whole C-band of optical communications (1530-1565 nm) by changing the Bragg grating peak reflectivity wavelength. A relative intensity noise lower than -150 dB/Hz has been measured for frequencies larger than 2 MHz. Stability of single-frequency operation, low intensity noise and flexibility in the choice of the operating wavelength make this laser array particularly attractive for wavelength division multiplexing optical transmissions.

Paper Details

Date Published: 5 April 2002
PDF: 9 pages
Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); doi: 10.1117/12.461652
Show Author Affiliations
Gino Sorbello, INFM/Politecnico di Milano and CEQSE/CNR (Italy)
Stefano Taccheo, INFM/Politecnico di Milano and CEQSE/CNR (Italy)
Roberta Ramponi, INFM/Politecnico di Milano and CEQSE/CNR (Italy)
Vittorio Foglietti, IESS/CNR (Italy)
Shibin Jiang, Optical Sciences Ctr./Univ. of Arizona (United States)
Nasser Peyghambarian, Optical Sciences Ctr./Univ. of Arizona (United States)
Paolo Laporta, INFM/Politecnico di Milano and CEQSE/CNR (Italy)

Published in SPIE Proceedings Vol. 4645:
Rare-Earth-Doped Materials and Devices VI
Shibin Jiang; Robert W. Keys, Editor(s)

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