H A Davani

Publications (8)4.55 Total impact

• Article: Surface micromachined MEMS-tunable VCSELs with wide and fast wavelength tuning

  C. Gierl, T. Gründl, K. Zogal, H. A. Davani, C. Grasse, G. Böhm, F. Küppers, P. Meissner, M.-C. Amann
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  ABSTRACT: For the first time a vertical-cavity surface-emitting laser (VCSEL) with singlemode wavelength tuning over 74 nm in the range of 1.55 µm and a wavelength tuning speed of ~200 kHz is demonstrated. The wavelength tuning is achieved with the electro static actuated of a mirror membrane, fabricated with surface micromachining. The mirror membrane consists of the dielectric materials SiOx and SiNy deposited with low temperature (< 100 °C) plasma enhanced chemical vapour deposition. The maximum fibre-coupled optical output power of the VCSEL is 1.8 mW and >1 mW over the entire tuning range. The sidemode suppression ratio is >40 dB.
  Electronics Letters 02/2013; 47(22):1243-1244. · 0.96 Impact Factor
• Article: 1.55 μm high-speed MEMS-tunable VCSEL

  K Zogal, T Gruendl, H A Davani, C Gierl, C Grasse, F Kueppers, P Meissner, M -C Amann
  01/2012;
• Article: Polarization investigation of a tunable high-speed short-wavelength bulk-micromachined MEMS-VCSEL

  H A Davani, B Kögel, P Debernardi, C Grasse, C Gierl, K Zogal, Å Haglund, J Gustavsson, P Westbergh, T Gründl, P Komissinskiy, T Bitsch, L Alff, F Küppers, A Larsson, M -C Amann, P Meissner
  01/2012;
• Source

  Available from: Christian Gierl

  Article: Surface micromachined tunable 1.55 μm-VCSEL with 102 nm continuous single-mode tuning.

  C Gierl, T Gruendl, P Debernardi, K Zogal, C Grasse, H A Davani, G Böhm, S Jatta, F Küppers, P Meissner, M-C Amann
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  ABSTRACT: For the first time a vertical-cavity surface-emitting laser (VCSEL) with a single-mode wavelength-tuning over 102 nm in the range of 1550 nm is demonstrated. The fiber-coupled optical output power has a maximum of 3.5 mW and is > 2 mW over the entire tuning range. The sidemode suppression ratios are > 45 dB. The wavelength tuning is achieved with the micro-electro mechanical actuation of a mirror membrane fabricated with surface micro-machining for on-wafer mass production. The mirror membrane consists of low cost dielectric materials (SiOx/SiNy) deposited with low temperature (< 100°C) Plasma Enhanced Chemical Vapor Deposition (PECVD).
  Optics Express 08/2011; 19(18):17336-43. · 3.59 Impact Factor
• Conference Proceeding: Electro thermal and electro statical actuation of a surface micromachined tunable Fabry-Pérot filter

  C. Gierl, K. Zogal, H.A. Davani, P. Meissner
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  ABSTRACT: We present a surface micromachined electro-thermal as well as electro-statical tunable Fabry-Perot filter for on wafer mass production. With insertion losses <; 1.4 dB (from standard single mode fiber (SSMF) to SSMF) and a tuning range of 112 nm.
  Lasers and Electro-Optics (CLEO), 2011 Conference on; 06/2011
• Conference Proceeding: High speed modulation of a 1.55-µm MEMS-tunable VCSEL

  K Zogal, T Gruendl, H A Davani, C Gierl, S Jatta, C Grasse, M -C Amann, P Meissner
  Lasers and Electro-Optics (CLEO), 2011 Conference on; 05/2011
• Conference Proceeding: Widely electro thermal tunable bulk-micromachined MEMS-VCSEL operating around 850nm

  H A Davani, C Grasse, B Kogel, C Gierl, K Zogal, T Grundl, P Westbergh, S Jatta, G Bohm, P Meissner, A Larsson, M -C Amann
  Quantum Electronics Conference Lasers and Electro-Optics (CLEO/IQEC/PACIFIC RIM), 2011; 01/2011
• Conference Proceeding: Widely tunable high-speed bulk-micromachined short-wavelength MEMS-VCSEL

  H.A. Davani, C. Grasse, B. Kögel, P. Westbergh, C. Gierl, K. Zogal, S. Jatta, G. Böhm, T. Gründl, P. Meissner, A. Larsson, M.-C. Amann
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  ABSTRACT: We present the first results of a high-speed bulk-micromachined tunable vertical-cavity surface-emitting laser (VCSEL) operating near 850nm using a half-symmetric resonator with a movable curved microelectromechanical system (MEMS) membrane.
  Semiconductor Laser Conference (ISLC), 2010 22nd IEEE International; 10/2010