DBR tapered diode lasers

Several demanding applications such as nonlinear frequency conversion, pumping of laser systems such as femto-second titanium-sapphire lasers, and Raman spectroscopy on heterogeneous targets require laser light sources with sufficiently high optical output power and superior beam quality. At FBH, such light sources are developed based on tapered diode lasers. Diffraction-limited emission of a ridge waveguide is intrinsically coupled into a tapered section for power amplification. Additional wavelength stabilization is obtained by implementing passive DBR gratings. The low dimensions of such DBR tapered diode lasers and their high electro-optical efficiencies enable an integration into small and thus mobile laser systems without sophisticated cooling.

Current applications

  • Nonlinear frequency conversion into the visible spectral range
  • Excitation light source for Raman spectroscopy in medicine

Typical wavelengths

  • 785 nm
  • 1030 nm
  • 1064 nm

Technology and packaging

  • Diode lasers with vertical layer structures realized by MOVPE
  • Anti-reflection coating of laser facets
  • Mounting and characterization of electro-optical, spectral and spatial properties

Typical specifications

  • 10 W central lobe output power by DBR tapered diode laser at 1030 nm
  • 8 W diffraction-limited power for devices at 1064 nm
  • Several watts of power available for applications at 785 nm
  • Compact footprint (max. 25 mm x 25 mm)

Fundings has been provided by the FP7-ICT Programme of the European Commission for the project FAMOS under grant number 317744 (duration: 01.10.2012 - 30.09.2016), the European Union’s Horizon 2020 research and innovation programme for the project MIB under grant agreement number No 667933 (duration 01.01.2016 - 31.12.2020), and the Leibniz research network in the project HypeRam (duration 01.06.2016 - 31.05.2019).