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Jes Broeng - One of the best experts on this subject based on the ideXlab platform.

  • lasing in thulium doped polarizing Photonic Crystal Fiber
    Optics Letters, 2011
    Co-Authors: Norbert Modsching, Jes Broeng, Pankaj Kadwani, Andrew R Sims, Lasse Leick, Lawrence Shah, Martin Richardson
    Abstract:

    We describe lasing of a thulium-doped polarizing Photonic Crystal Fiber. A 4 m long Fiber with 50 μm diameter core, 250 μm diameter cladding, and d/Λ ratio of 0.18 was pumped with a 793 nm diode and produced a polarized output with a polarization extinction ratio (PER) of 15 dB and an M2 of <1.15. An intracavity polarizer and half-wave plate minimally increased the PER to 16 dB. The output power had 35% slope efficiency relative to the absorbed pump power. The maximum cw output power was limited to 4 W due to the quantum defect heating of the Fiber.

  • Stress-induced single-polarization single-transverse mode Photonic Crystal Fiber with low nonlinearity.
    Optics express, 2005
    Co-Authors: T. Schreiber, A Petersson, Rumen Iliew, Chris Jacobsen, Fabian Röser, K. P. Hansen, K. Hansen, Jens Limpert, Falk Lederer, O. Schmidt, Jes Broeng
    Abstract:

    We report on the design of a single-polarization single-transverse mode large mode area Photonic Crystal Fiber. By including index-matched stress applying elements in the Photonic cladding an ultra-broadband single polarization window is obtained while a large mode field area of ~700 microm(2) is maintained. Based on that design, an Yb-doped double-clad Photonic Crystal Fiber is realized that combines low nonlinearity and single polarization properties. A first result of the high power operation using this Fiber is demonstrated.

  • high power air clad large mode area Photonic Crystal Fiber laser
    Optics Express, 2003
    Co-Authors: Jens Limpert, Rumen Iliew, Jes Broeng, T. Schreiber, Stefan Nolte, H Zellmer, T Tunnermann, F Lederer, Guillaume Vienne, A Petersson
    Abstract:

    We report on a 2.3 m long air-clad ytterbium-doped large-mode-area Photonic Crystal Fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 µm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such Fibers allow scaling to even higher powers.

  • highly nonlinear Photonic Crystal Fiber with zero dispersion at 1 55 spl mu m
    Optical Fiber Communication Conference, 2002
    Co-Authors: K. P. Hansen, Jes Broeng, Harald R Simonsen, J R Jensen, C Jacobsen, Peter M W Skovgaard, A Petersson
    Abstract:

    We demonstrate, for the first time, a highly nonlinear polarization maintaining Photonic Crystal Fiber with zero dispersion at 1.55 /spl mu/m, nonlinear coefficient of 20 (Wkm)/sup -1/ and splice loss to standard technology Fiber of 0.3 dB.

  • high birefringent Photonic Crystal Fiber
    Optical Fiber Communication Conference, 2001
    Co-Authors: S B Libori, Jes Broeng, Erik Knudsen, Anders Bjarklev, Harald R Simonsen
    Abstract:

    A highly birefringent Photonic Crystal Fiber design is analysed. Birefringence up to 10/sup -3/ is found. Random fluctuations in the cladding design are analysed, and the Fiber is found to be a feasible polarization maintaining Fiber.

A Petersson - One of the best experts on this subject based on the ideXlab platform.

  • Stress-induced single-polarization single-transverse mode Photonic Crystal Fiber with low nonlinearity.
    Optics express, 2005
    Co-Authors: T. Schreiber, A Petersson, Rumen Iliew, Chris Jacobsen, Fabian Röser, K. P. Hansen, K. Hansen, Jens Limpert, Falk Lederer, O. Schmidt, Jes Broeng
    Abstract:

    We report on the design of a single-polarization single-transverse mode large mode area Photonic Crystal Fiber. By including index-matched stress applying elements in the Photonic cladding an ultra-broadband single polarization window is obtained while a large mode field area of ~700 microm(2) is maintained. Based on that design, an Yb-doped double-clad Photonic Crystal Fiber is realized that combines low nonlinearity and single polarization properties. A first result of the high power operation using this Fiber is demonstrated.

  • high power air clad large mode area Photonic Crystal Fiber laser
    Optics Express, 2003
    Co-Authors: Jens Limpert, Rumen Iliew, Jes Broeng, T. Schreiber, Stefan Nolte, H Zellmer, T Tunnermann, F Lederer, Guillaume Vienne, A Petersson
    Abstract:

    We report on a 2.3 m long air-clad ytterbium-doped large-mode-area Photonic Crystal Fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 µm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such Fibers allow scaling to even higher powers.

  • highly nonlinear Photonic Crystal Fiber with zero dispersion at 1 55 spl mu m
    Optical Fiber Communication Conference, 2002
    Co-Authors: K. P. Hansen, Jes Broeng, Harald R Simonsen, J R Jensen, C Jacobsen, Peter M W Skovgaard, A Petersson
    Abstract:

    We demonstrate, for the first time, a highly nonlinear polarization maintaining Photonic Crystal Fiber with zero dispersion at 1.55 /spl mu/m, nonlinear coefficient of 20 (Wkm)/sup -1/ and splice loss to standard technology Fiber of 0.3 dB.

Jens Limpert - One of the best experts on this subject based on the ideXlab platform.

  • extended single mode Photonic Crystal Fiber lasers
    Optics Express, 2006
    Co-Authors: Jens Limpert, Fabian Röser, O. Schmidt, T. Schreiber, Jan Rothhardt, Andreas Tunnermann, S Ermeneux, P Yvernault, F Salin
    Abstract:

    We report on an ytterbium-doped Photonic Crystal Fiber with a core diameter of 60 μm and mode-field-area of ~2000 μm2 of the emitted fundamental mode. Together with the short absorption length of 0.5 m this Fiber possesses a record low nonlinearity which makes this Fiber predestinated for the amplification of short laser pulses to very high peak powers. In a first continuous-wave experiment a power of 320 W has been extracted corresponding to 550 W per meter. To our knowledge this represents the highest power per unit length ever reported for Fiber lasers. Furthermore, the robust single-transverse-mode propagation in a passive 100 μm core Fiber with a similar design reveals the potential of extended large-mode-area Photonic Crystal Fibers.

  • Stress-induced single-polarization single-transverse mode Photonic Crystal Fiber with low nonlinearity.
    Optics express, 2005
    Co-Authors: T. Schreiber, A Petersson, Rumen Iliew, Chris Jacobsen, Fabian Röser, K. P. Hansen, K. Hansen, Jens Limpert, Falk Lederer, O. Schmidt, Jes Broeng
    Abstract:

    We report on the design of a single-polarization single-transverse mode large mode area Photonic Crystal Fiber. By including index-matched stress applying elements in the Photonic cladding an ultra-broadband single polarization window is obtained while a large mode field area of ~700 microm(2) is maintained. Based on that design, an Yb-doped double-clad Photonic Crystal Fiber is realized that combines low nonlinearity and single polarization properties. A first result of the high power operation using this Fiber is demonstrated.

  • high power air clad large mode area Photonic Crystal Fiber laser
    Optics Express, 2003
    Co-Authors: Jens Limpert, Rumen Iliew, Jes Broeng, T. Schreiber, Stefan Nolte, H Zellmer, T Tunnermann, F Lederer, Guillaume Vienne, A Petersson
    Abstract:

    We report on a 2.3 m long air-clad ytterbium-doped large-mode-area Photonic Crystal Fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 µm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such Fibers allow scaling to even higher powers.

T. Schreiber - One of the best experts on this subject based on the ideXlab platform.

  • extended single mode Photonic Crystal Fiber lasers
    Optics Express, 2006
    Co-Authors: Jens Limpert, Fabian Röser, O. Schmidt, T. Schreiber, Jan Rothhardt, Andreas Tunnermann, S Ermeneux, P Yvernault, F Salin
    Abstract:

    We report on an ytterbium-doped Photonic Crystal Fiber with a core diameter of 60 μm and mode-field-area of ~2000 μm2 of the emitted fundamental mode. Together with the short absorption length of 0.5 m this Fiber possesses a record low nonlinearity which makes this Fiber predestinated for the amplification of short laser pulses to very high peak powers. In a first continuous-wave experiment a power of 320 W has been extracted corresponding to 550 W per meter. To our knowledge this represents the highest power per unit length ever reported for Fiber lasers. Furthermore, the robust single-transverse-mode propagation in a passive 100 μm core Fiber with a similar design reveals the potential of extended large-mode-area Photonic Crystal Fibers.

  • Stress-induced single-polarization single-transverse mode Photonic Crystal Fiber with low nonlinearity.
    Optics express, 2005
    Co-Authors: T. Schreiber, A Petersson, Rumen Iliew, Chris Jacobsen, Fabian Röser, K. P. Hansen, K. Hansen, Jens Limpert, Falk Lederer, O. Schmidt, Jes Broeng
    Abstract:

    We report on the design of a single-polarization single-transverse mode large mode area Photonic Crystal Fiber. By including index-matched stress applying elements in the Photonic cladding an ultra-broadband single polarization window is obtained while a large mode field area of ~700 microm(2) is maintained. Based on that design, an Yb-doped double-clad Photonic Crystal Fiber is realized that combines low nonlinearity and single polarization properties. A first result of the high power operation using this Fiber is demonstrated.

  • high power air clad large mode area Photonic Crystal Fiber laser
    Optics Express, 2003
    Co-Authors: Jens Limpert, Rumen Iliew, Jes Broeng, T. Schreiber, Stefan Nolte, H Zellmer, T Tunnermann, F Lederer, Guillaume Vienne, A Petersson
    Abstract:

    We report on a 2.3 m long air-clad ytterbium-doped large-mode-area Photonic Crystal Fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 µm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such Fibers allow scaling to even higher powers.

Valerio Pruneri - One of the best experts on this subject based on the ideXlab platform.

  • Photonic Crystal Fiber enabled micro fabry perot interferometer
    Optics Letters, 2009
    Co-Authors: Joel Villatoro, V Finazzi, G Coviello, Valerio Pruneri
    Abstract:

    We report on the fabrication of a monolithic Fiber Fabry–Perot interferometer whose cavity is a microscopic air bubble. The latter is formed when splicing together a conventional single-mode Fiber and an index-guiding Photonic Crystal Fiber with the standard arc-discharge technique. Spherical microcavities with diameters ranging from 20 to 58 μm were fabricated with such a technique. The interferometers exhibited low thermal sensitivity (less than 1.0 pm/°C), high mechanical strength, broad operation wavelength range, and fringe contrast in the 8–12 dB range. The applications of the interferometers for strain sensing (up to 5000 μϵ) is demonstrated.

  • Photonic Crystal Fiber enabled micro fabry perot interferometer
    Optics Letters, 2009
    Co-Authors: Joel Villatoro, V Finazzi, G Coviello, Valerio Pruneri
    Abstract:

    We report on the fabrication of a monolithic Fiber Fabry-Perot interferometer whose cavity is a microscopic air bubble. The latter is formed when splicing together a conventional single-mode Fiber and an index-guiding Photonic Crystal Fiber with the standard arc-discharge technique. Spherical microcavities with diameters ranging from 20 to 58 microm were fabricated with such a technique. The interferometers exhibited low thermal sensitivity (less than 1.0 pm/ degrees C), high mechanical strength, broad operation wavelength range, and fringe contrast in the 8-12 dB range. The applications of the interferometers for strain sensing (up to 5000 micro(epsilon) is demonstrated.

  • refractometry based on a Photonic Crystal Fiber interferometer
    Optics Letters, 2009
    Co-Authors: Joel Villatoro, Goncal Badenes, Valerio Pruneri
    Abstract:

    We report a simple and compact modal interferometer for applications in refractometry. The device consists of a stub of large-mode-area Photonic Crystal Fiber (PCF) spliced between standard single-mode Fibers. In the splice regions the voids of the PCF are fully collapsed, thus allowing the coupling and recombination of PCF core and cladding modes. The device is highly stable over time, has low temperature sensitivity, and is suitable for measuring indices in the 1.330-1.440 range. The measure of the refractive index is carried out by monitoring the shift of the interference pattern.