Publications

(Texte original anglais seulement) We present a simple way to achieve and optimize hundreds of kW peak power pulsed output using a monolithic amplifier chain based on solid core double cladding fiber tightly packaged. A fiber pigtailed current driven diode is used to produce nanosecond pulses at 1064 nm. We...

(Texte original anglais seulement) A mid-infrared supercontinuum source spanning from 3 to 8 μm is demonstrated using a low-loss As2Se3 commercial step-index fiber. A maximum average output power of 1.5 mW is obtained at a low repetition rate of 2 kHz. Thanks to the low NA step-index fiber, the output...

(Texte original en anglais seulement) We demonstrate a high-power cladding-pumped Er–Yb codoped fiber laser with 74% efficiency. A pump-limited output power of 264 W is obtained using in-band pumping at 1535 nm. We compare the efficiency of 1480 and 1535 nm pumping through numerical simulations and experimental measurements.

(Texte original anglais seulement) Fabrication process of arsenic-sulfide (As-S) and arsenic-selenide (As-Se) optical fibers has been improved to enhance the transmission in the mid-IR region. Typical attenuation spectrum of As-S or As-Se optical fibers shows impurities bands, such as S-H, Se-H, O-H, which limit their operation and cause the increase...

(Texte original anglais seulement) Many scientific and industrial applications require high peak power laser pulses at 1 µm. Ytterbium doped fiber amplifiers are interesting for such application due to their compactness, efficiency and good beam quality. But achieving high peak is challenging with fibers due to the difficulty of enlarging...

(Texte original anglais seulement) A high power, high efficiency, Erbium doped fiber laser with in-band cladding pumping is demonstrated is this paper. Pump-limited, 103 W output power is reported with a record efficiency of 75% with respect to the launched pump power. This is, to the best of our knowledge,...

(Texte original anglais seulement) Broadband amplification of several high power communication channels is demonstrated using a multimode Erbium-Ytterbium doped fiber (EYDF) amplifier. The multimode feature of this amplifier aims at simultaneously enabling wide gain bandwidth and high output power. The amplifier provides a gain bandwidth spanning over the 1535.0 nm-1565.8...

(Texte original anglais seulement) A multimode Erbium-Ytterbium doped fiber can be advantageously used for DWDM channel amplification over an extended spectral band with respect to conventional designs. Bit error ratio at 40 Gb/s, gain and noise figure are provided.

(Texte original anglais seulement) A multimode Erbium-Ytterbium doped fiber can be advantageously used for the amplification of WDM channels over an extended spectral band with respect to conventional designs. Bit error ratio at 10 Gb/s, gain and noise figure are provided.

(Texte original anglais seulement) A Fiber bragg grating of 369 nm pitch was inscribed in a germanium-free double-clad ytterbium doped silica fiber using a femto-second pulse train at 400 nm wavelength and a phase mask. The photo-induced refractive index modulation of higher than 4×10−3 was obtained and the accompanying photo-induced...

(Texte original anglais seulement) In this work, we examine how the linewidth of high-power Yb-doped fiber lasers changes as a function of laser power. Four-wave mixing between the various longitudinal modes of the laser cavity tends to broaden the laser linewidth, while Bragg reflectors have a narrow bandwidth that limits...

(Texte original anglais seulement) Pulseshaping is important in high energy pulsed fiber MOPA system to mitigate non-linear effects and optimize the processing of different materials. However, pulseshaping is greatly limited by the spectral features of the semiconductor seed source commonly used as the master oscillator. Through the appropriate design of...