Dr. Tim Hellwig

Postdoc

Room: 113
Tel.: +49 (0) 251 83 36086
Fax.: +49 (0) 251 83 36162
e-mail: tim.hellwig@uni-muenster.de
Adress:  Corrensstraße 2/4
D-48149 Münster

Research Topics

Nonlinear Waveguides

 

Publications

Articles in Journals

  • Hellwig T, Walbaum T, Fallnich C. . ‘Optically induced mode conversion in graded-index fibers using ultra-short laser pulses.’ Applied Physics B 112, No. 4: 499-505. doi: 10.1007/s00340-013-5645-5.
  • Rieger S, Hellwig T, Walbaum T, Fallnich C. . ‘Optical repetition rate stabilization of a mode-locked all-fiber laser.’ Optics Express 21, No. 4: 4889-4895. doi: 10.1364/OE.21.004889.
  • Knitter S, Hellwig T, Kues M, Fallnich C. . ‘Spectrally resolving single-shot polarimeter.’ Optics Letters 36, No. 16: 3048-3050. doi: 10.1364/OL.36.003048.
  • Hellwig T, Walbaum T, Gross P, Fallnich C. . ‘Automated characterization and alignment of passively mode-locked fiber lasers based on nonlinear polarization rotation.’ Applied Physics B 101, No. 3: 565-570. doi: 10.1007/s00340-010-4224-2.

Conference Articles

  • Hellwig T, Brinkmann M, Spelthann S, Fallnich C. . ‘Electronically Tunable Dual-Color All-Fiber Optical Parametric Oscillator.’ Contributed to the CLEO/Europe-EQEC, München.
  • Lüpken N, Hellwig T, Schnack M, Boller K-J, Fallnich C. . ‘All-optical switching using transverse modes in integrated waveguides.’ Contributed to the CLEO/Europe-EQEC, München, Deutschland.
  • Würthwein T, Brinkmann M, Hellwig T, Fallnich C. . ‘Rapid spectro-polarimetry to probe molecular symmetry in multiplex coherent anti-Stokes Raman scattering.’ Contributed to the CLEO/Europe-EQEC, München, Deutschland.
  • Brinkmann M, Hellwig T, Fallnich C. . ‘Optical Parametric Chirped Pulse Oscillation.’ Contributed to the CLEO/Europe-EQEC, München, Deutschland.
  • Epping J P, Hellwig T, Hoekmann M, Matemann R, Leinse A, Heidemann R, van Rees A, van der Slot P, Lee C, Fallnich C, Boller K-J, ,. . ‘Simultaneous supercontinuum and third harmonic generation in Si3N4 waveguides.’ Contributed to the CLEO/Europe - IQEC, München.
  • Epping J P, Hellwig T, Hoekmann M, Matemann R, Leinse A, Heidemann R, van Rees A, van der Slot P, Lee C, Fallnich C, Boller K-J. . ‘Enabling supercontinuum generation in Si3N4 waveguides.’ Contributed to the 38th Annual meeting NNV AMO, Lunteren, Netherlands.
  • Hellwig T, Epping J P, Schnack M, Boller K-J, Fallnich, C. . ‘Low-energy, all-optical switching of transverse modes in integrated waveguides.’ Contributed to the Europhoton, Neuchâtel, Switzerland.
  • Epping J P, Hellwig T, Hoekmann M, Leinse A, Heidemann R, van der Slot P, Lee C, Fallnich C, Boller K-J, Matemann R, van Rees A. . ‘Supercontinuum generation in thick silicon nitride waveguides.’ Contributed to the Europhoton, Neuchâtel, Switzerland.
  • Hellwig T, Schnack M, Dobner S, Fallnich C. . Experimental realisation of transverse mode conversion using optically induced transient long-period gratings.’ In Advanced Photonics, JTu3A.31.: Optical Society of America. doi: 10.1364/BGPP.2014.JTu3A.31.
  • Fallnich C, Schnack M, Hellwig T, Walbaum T. . ‘Transverse mode conversion in optical fibers using transient long-period gratings induced by ultrashort pulses.’ Contributed to the Extreme Nonlinear Optics & Solitons (ENOS), WIAS Berlin.
  • Hellwig T, Walbaum T, Schnack M, Fallnich C. . Optically Induced Transverse Mode Conversion of Ultrashort-Pulses in Optical Waveguides.’ Contributed to the Nonlinear Optics (NLO), Kohala Coast, Hawaii, USA. doi: 10.1364/NLO.2013.NTh2A.5.
  • Hellwig T, Rieger S, Walbaum T, Fallnich C. . ‘Optical Repetition Rate Control of an Erbium-doped All-Fiber Laser.’ Contributed to the CLEO/Europe - IQEC, München.
  • Walbaum T, Schnack M, Hellwig, T, Fallnich C. . ‘Experimental Verification of Femtosecond Transverse Mode Conversion Induced by Non-Permanently Written Long-Period Gratings.’ Contributed to the CLEO/Europe - IQEC, München.
  • Walbaum T, Hellwig T, Fallnich C. . ‘Non-Permanent Optically Induced Long-Period Gratings for Energy Transfer between Transverse Fiber Modes using Femtosecond Pulses.’ Contributed to the CLEO/Europe - IQEC, München.