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Proceedings Paper

Integrated optical DBR- and DFB-lasers in Er:LiNbO3 with photorefractive gratings
Author(s): Bijoy Krishna Das; Christian Becker; Thomas Oesselke; Raimund Ricken; Viktor Quiring; Hubertus Suche; Wolfgang Sohler
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Paper Abstract

A family of narrow linewidth integrated optical distributed Bragg reflector- (DBR-), distributed feedback- (DFB-), and DBR-/DFB-coupled cavity lasers with Er-doped LiNbO3 single-mode waveguide is reviewed. They have one or two photorefractive gratings in Fe-doped waveguide sections. Two types of DBR-lasers have been developed. The first type has a cavity consisting of one Bragg-grating in a Ti:Fe:LiNbO3 waveguide, a gain section with Ti:Er:LiNbO3 waveguide, and a multi-layer dielectric mirror deposited on one polished end face. The second DBR-cavity consists of two gratings in Ti:Fe:LiNbO3 on both sides of the Er-doped waveguide. Their power characteristics and spectral properties were investigated. Single-frequency operation could be achieved in the latter case at various wavelengths in the Er-band (1530nm <λ< 1575nm) with up to 1.12mW output power. A DFB-laser with two lowest-order modes has been demonstrated with a photorefractive grating in a Ti:Fe:Er:LiNbO3 waveguide; it is combined with an integrated optical amplifier on the same substrate. Moreover, an attractive DBR/DFB coupled cavity laser has been developed and investigated. Its cavity consists of a photorefractive Bragg grating in the Ti:Fe:Er:LiNbO3 waveguide section close to one end face of the sample, a Ti:Er:LiNbO3 gain section and a broadband dielectric multi-layer mirror of high reflectivity on the other end face.

Paper Details

Date Published: 3 April 2003
PDF: 12 pages
Proc. SPIE 4944, Integrated Optical Devices: Fabrication and Testing, (3 April 2003); doi: 10.1117/12.468300
Show Author Affiliations
Bijoy Krishna Das, Univ. Paderborn (Germany)
Christian Becker, Univ. Paderborn (Germany)
Thomas Oesselke, Univ. Paderborn (Germany)
Raimund Ricken, Univ. Paderborn (Germany)
Viktor Quiring, Univ. Paderborn (Germany)
Hubertus Suche, Univ. Paderborn (Germany)
Wolfgang Sohler, Univ. Paderborn (Germany)

Published in SPIE Proceedings Vol. 4944:
Integrated Optical Devices: Fabrication and Testing

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