High brilliance 1120 nm diode lasers for compact 560 nm light sources
The FBH has developed a compact source at 1120 nm which is ideally suited for frequency doubling to 560 nm, a wavelength used for time-resolved fluorescence and atomic spectroscopy, photocoagulation in ophthalmology, medical skin treatments, and high-resolution refractometry. Unlike currently available laser sources, the FBH laser offers direct modulation capability, high efficiency, and flexible wavelengths. The laser bases on a monolithic distributed Bragg-reflector ridge-waveguide diode laser (DBR-RWL) featuring high optical output power, nearly diffraction limited beam, and narrow spectral linewidth. Furthermore, the new laser chip comprises electrical heaters next to the DBR, which enables a flexible tuning of the emission wavelength. The DBR-RWLs achieved output powers up to 1 W and a maximum conversion efficiency of ~ 34 % with spatial and spectral single-mode emission. They are the basis for future matchbox-sized laser modules enabling mobile applications and handheld devices. Thus, results of in situ measurements are instantly available.
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K. Paschke, C. Fiebig, G. Blume, J. Fricke, F. Bugge, H. Wenzel, G. Erbert, "Tunable and highly brilliant laser sources at 1120 nm", European Conf. on Lasers and Electro-Optics and Int. Quantum Electronics Conf. (CLEO®/Europe-IQEC), Munich, Germany, May 12-16, paper CB-9.2-THU (2013).
K. Paschke, C. Fiebig, G. Blume, F. Bugge, J. Fricke, G. Erbert, "1120 nm highly brilliant laser sources for SHG-modules in bio-analytics and spectroscopy", Proc. SPIE, vol. 8640, Photonics West, San Francisco, USA, Feb. 02-07, 86401J (2013).
K. Paschke, H. Wenzel, C. Fiebig, G. Blume, F. Bugge, J. Fricke, G. Erbert, "High Brightness, Narrow Bandwidth DBR Diode Lasers at 1120 nm", IEEE Photonics Technol. Lett., vol. 25, no. 20, pp. 1951-1954 (2013).