@article{ZinkWernerJechowetal.2014,
  author    = {Zink, Christof and Werner, Nils and Jechow, Andreas and Heuer, Axel and Menzel, Ralf},
  title     = {Multi-wavelength operation of a single broad area diode laser by spectral beam combining},
  series = {IEEE photonics technology letters},
  volume    = {26},
  journal   = {IEEE photonics technology letters},
  number    = {3},
  publisher = {Inst. of Electr. and Electronics Engineers},
  address   = {Piscataway},
  issn      = {1041-1135},
  doi       = {10.1109/LPT.2013.2291963},
  pages     = {253 -- 256},
  year      = {2014},
  abstract  = {Stabilized multi-wavelength emission from a single emitter broad area diode laser (BAL) is realized by utilizing an external cavity with a spectral beam combining architecture. Self-organized emitters that are equidistantly spaced across the slow axis are enforced by the spatially distributed wavelength selectivity of the external cavity. This resulted in an array like near-field emission although the BAL is physically a single emitter without any epitaxial sub-structuring and only one electrical contact. Each of the self-organized emitters is operated at a different wavelength and the emission is multiplexed into one spatial mode with near-diffraction limited beam quality. With this setup, multi-line emission of 31 individual spectral lines centered around and a total spectral width of 3.6 nm is realized with a 1000 mu m wide BAL just above threshold. To the best of our knowledge, this is the first demonstration of such a self-organization of emitters by optical feedback utilizing a spectral beam combining architecture.},
  language  = {en}
}
@article{ZinkNiebuhrJechowetal.2014,
  author    = {Zink, Christof and Niebuhr, Mario and Jechow, Andreas and Heuer, Axel and Menzel, Ralf},
  title     = {Broad area diode laser with on-chip transverse Bragg grating stabilized in an off-axis external cavity},
  series = {Optics express : the international electronic journal of optics},
  volume    = {22},
  journal   = {Optics express : the international electronic journal of optics},
  number    = {12},
  publisher = {Optical Society of America},
  address   = {Washington},
  issn      = {1094-4087},
  doi       = {10.1364/OE.22.014108},
  pages     = {14108 -- 14113},
  year      = {2014},
  abstract  = {The emission characteristics of a novel, specially designed broad area diode laser (BAL) with on-chip transversal Bragg resonance (TBR) grating in lateral direction were investigated in an off-axis external cavity setup. The internal TBR grating defines a low loss transversal mode at a specific angle of incidence and a certain wavelength. By providing feedback at this specific angle with an external mirror, it is possible to select this low loss transverse mode and stabilize the BAL. Near diffraction limited emission with an almost single lobed far field pattern could be realized, in contrast to the double lobed far field pattern of similar setups using standard BALs or phase-locked diode laser arrays. Furthermore, we could achieve a narrow bandwidth emission with a simplified setup without external frequency selective elements. (C) 2014 Optical Society of America},
  language  = {en}
}
@article{SchwarzeGarzTeuchneretal.2014,
  author    = {Schwarze, Thomas and Garz, Andreas and Teuchner, Klaus and Menzel, Ralf and Holdt, Hans-J{\"u}rgen},
  title     = {Two-photon probes for metal ions based on phenylaza[18]crown-6 ethers and 1,2,3-triazoles as pi-linkers},
  series = {ChemPhysChem : a European journal of chemical physics and physical chemistry},
  volume    = {15},
  journal   = {ChemPhysChem : a European journal of chemical physics and physical chemistry},
  number    = {12},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1439-4235},
  doi       = {10.1002/cphc.201402232},
  pages     = {2436 -- 2439},
  year      = {2014},
  language  = {en}
}
@article{HeuerRaabeMenzel2014,
  author    = {Heuer, Axel and Raabe, S. and Menzel, Ralf},
  title     = {Phase memory across two single-photon interferometers including wavelength conversion},
  series = {Physical review : A, Atomic, molecular, and optical physics},
  volume    = {90},
  journal   = {Physical review : A, Atomic, molecular, and optical physics},
  number    = {4},
  publisher = {American Physical Society},
  address   = {College Park},
  issn      = {1050-2947},
  doi       = {10.1103/PhysRevA.90.045803},
  pages     = {4},
  year      = {2014},
  abstract  = {Spontaneous parametric down-conversion (SPDC) in a nonlinear crystal generates two single photons (signal and idler) with random phases. Thus, no first-order interference between them occurs. However, coherence can be induced in a cascaded setup of two crystals if, e.g., the idler modes of both crystals are aligned to be indistinguishable. Due to the effect of phase memory it is found that the first-order interference of the signal beams can be controlled by the phase delay between the pump beams. Even for pump photon delays much larger than the coherence length of the SPDC photons, the visibility is above 90\%. The high visibilities reported here prove an almost perfect phase memory effect across the two interferometers for the pump and the signal photon modes.},
  language  = {en}
}