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Proceedings Paper

Green light source by single-pass second harmonic generation with laser and crystal in a tilted butt joint setup
Author(s): J. Wiedmann; F. Scholz; T. Tekin; S. Marx; G. Lang; H. Schröder; O. Brox; G. Erbert
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Paper Abstract

In this work a compact green laser light source is presented based on a single-pass second harmonic generation (SHG) in non-linear material. The green light source consists of a distributed feedback (DFB) laser with a monolithically integrated power amplifier (PA) and a periodically poled lithium niobate (PPLN) crystal with a ridge waveguide. To achieve the smallest size and to reduce the number of parts to be assembled, a direct coupling approach is implemented without using any lens. The waveguide of the laser is bent and the facet of the crystal is tilted and AR-coated in order to reduce undesired reflections and to increase the stability of operation. By varying the injection current of the amplifier the infrared output power of the laser changes proportionally. The wavelength remains stable during current variation and in that way the green optical output power can also be modulated. No additional external modulator is required for the generation of distinct green light levels. At a wavelength of 530 nm, a green optical output power of more than 35 mW is achieved for injection currents of 93 mA and 400 mA through the DFB section and amplifier section respectively.

Paper Details

Date Published: 6 February 2009
PDF: 8 pages
Proc. SPIE 7212, Optical Components and Materials VI, 72120B (6 February 2009); doi: 10.1117/12.809228
Show Author Affiliations
J. Wiedmann, eagleyard Photonics GmbH (Germany)
F. Scholz, eagleyard Photonics GmbH (Germany)
T. Tekin, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration (Germany)
S. Marx, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration (Germany)
G. Lang, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration (Germany)
H. Schröder, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration (Germany)
O. Brox, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
G. Erbert, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)

Published in SPIE Proceedings Vol. 7212:
Optical Components and Materials VI
Shibin Jiang; Michel J. F. Digonnet; John W. Glesener; J. Christopher Dries, Editor(s)

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