Transverse-mode selective resonant grating-mirrors for high power and high brightness emission

International audienceThe finite angular spectral width of a 2D resonant grating mirror is adjusted to select the fundamental transverse mode of a laser and to filter out higher order modes. The selection principle is explained phenomenologically on a simplified 1D model. The 2D design is made so as to sustain the large field concentration in the grating slab-waveguide mirror, and the technology permitting to obtain the resonant reflection within the gain bandwidth of two types of laser is described. The blank experimental measurements by means of a white light supercontinuum are shown to match the targeted specifications on the resonance spectral position and angular width

Modal analysis and suppression of the Fourier modal method instabilities in highly conductive gratings

International audienc

Optical coherence management by resonant gratings

International audienc

Microchip Lasers - Enhancement of the Mode Area and Modal Discrimination of Microchip Lasers Using Angularly Selective Mirrors

International audienc

Fabrication of resonant grating pulse compression element with 99 % flat top efficiency for high average power femtosecond laser machining

Top hat diffraction efficiency in an all-dielectric SiO2/HfO2 grating femtosecond pulse compression grating is demonstrated with a close to 100% flat top over more than 20 nm around 800 nm wavelength. New perspectives are open for high average power femtosecond laser machining. The Poster shows the design, fabrication and the diffraction efficiency results of the element focusing on the fabrication detail

High top hat diffraction efficiency grating for femtosecond pulse compression

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97% Top Hat Efficiency, 4 J/cm2 Damage Threshold Compression Gratings

High diffraction efficiency all-dielectric pulse compression grating is reported with a close to 100% flat top over more than 20 nm spectral width around 800 nm wavelength and more than 4 J/cm2 damage threshold

> 97 % top hat efficiency, > 4 J/cm3 damage threshold compression gratings

High diffraction efficiency all-dielectric pulse compression grating is reported with a close to 100% flat top over more than 20 nm spectral width around 800 nm wavelength and more than 4 J/cm2 damage threshold

> 97 % top hat efficiency, > 4 J/cm3 damage threshold compression gratings

High diffraction efficiency all-dielectric pulse compression grating is reported with a close to 100% flat top over more than 20 nm spectral width around 800 nm wavelength and more than 4 J/cm2 damage threshold

> 97 % top hat efficiency, > 4 J/cm3 damage threshold compression gratings

High diffraction efficiency all-dielectric pulse compression grating is reported with a close to 100% flat top over more than 20 nm spectral width around 800 nm wavelength and more than 4 J/cm2 damage threshold