Monolithic Y-branch dual-wavelength DBR diode laser at 671 nm for Shifted Excitation Raman Difference Spectroscopy
M. Maiwald, J. Fricke, A. Ginolas, J. Pohl, B. Sumpf, G. Erbert, G. Tränkle
Published in:
Proc. SPIE, vol. 8718, Advanced Environmental, Chemical, and Biological Sensing Technologies X, Baltimore, USA, Apr. 29 - May 03, 871808 (2013).
Abstract:
A dual-wavelength laser diode source suitable for shifted excitation Raman difference spectroscopy (SERDS) is presented. This monolithic device contains two ridge waveguide (RW) sections with wavelengths adjusted distributed Bragg reflection (DBR) gratings as rear side mirrors. An integrated Y-branch coupler guides the emission into a common output aperture. The two wavelengths are centered at 671 nm with a well-defined spectral spacing of about 0.5 nm, i.e. 10 cm-1. Separate RW sections can be individually addressed by injection current. An output power up to 110 mW was achieved. Raman experiments demonstrate the suitability of these devices for SERDS.
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Keywords:
Red emitting diode lasers, 671 nm, Y-branch lasers, Raman spectroscopy, Shifted Excitation Raman Difference Spectroscopy, SERDS.
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