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Forschungsfabrik Mikroelektronik Deutschland
Fraunhofer-Verbund Mikroelektronik FMD

Anna-Louisa-Karsch-Str. 2
10178 Berlin (Germany)
Tel: +49 30 4005591-0

Co-exhibitor with Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Zentralverwaltung

Shifted Excitation Raman Difference Spectroscopy (SERDS) – Compact Turnkey Laser System for on-site Measurements

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The compact turnkey laser system developed by the Ferdinand-Braun-Institut includes a dual-wavelength diode laser for SERDS as key element. SERDS enables to extract Raman signals efficiently and rapidly from disturbing background interferences such as fluorescence and daylight. The monolithic Y-branch DBR-RW diode laser provides alternate emission light of two slightly different wavelengths. Both wavelengths are stabilized by separate DBR gratings integrated into the semiconductor device. The spectral distance for SERDS can be electrically adjusted by using implemented on-chip heater elements. The system has been demonstrated for wavelengths around 785 nm, 671 nm and 488 nm and successfully utilized for measurements in life science and agri-photonics.

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