Picometer resolution profilometer for hollow-core fiber surface roughness characterization

We build a picometer-sensitivity optical surface-profiler based on polarization-interferometry. The profilometer is design to measure surface roughness profiles of HCPCF. Two HCPCF categories with different fabrication processes were characterized. We observe that for HCPCFs fabricated the new process exhibit a reduction of rms core-surface roughness rms by a factor of close to 3 relative to the surface capillary wave thermodynamic limit, and thus explaining the record loss achieved in the VIS-UV range achieved with these fibers

Efficient Spectral Broadening in the 100-W Average Power Regime Using Gas Filled Kagome HC-PCF and Pulse Compression

We present nonlinear pulse compression of a high-power SESAM-modelocked thin-disk laser (TDL) using an Ar-filled hypocycloid-core Kagome Hollow-Core Photonic Crystal Fiber (HC-PCF). The output of the modelocked Yb:YAG TDL with 127 W average power, a pulse repetition rate of 7 MHz, and a pulse duration of 740 fs was spectrally broadened 16-fold while propagating in a Kagome HC-PCF containing 13 bar of static Argon gas. Subsequent compression tests performed using 8.4% of the full available power resulted in a pulse duration as short as 88 fs using the spectrally broadened output from the fiber. Compressing the full transmitted power through the fiber (118 W) could lead to a compressed output of >100 W of average power and >100 MW of peak power with an average power compression efficiency of 88%. This simple laser system with only one ultrafast laser oscillator and a simple single-pass fiber pulse compressor, generating both high peak power >100 MW and sub-100-fs pulses at megahertz repetition rate, is very interesting for many applications such as high harmonic generation and attosecond science with improved signal-to-noise performance

INHIBITED-COUPLING HOLLOW-CORE FIBERS : NEW HORIZONS

International audienceThis communication will review our recent developments in inhibited-coupling hollow-core fibers, ranging from understanding the optical guiding mechanism to new state-of-the-art performances. These results are expected to have strong impacts in a new landscape of research and technology

Tapered hollow-core photonic crystal fibers

International audienceIn this communication, we will first review the recent advances of hollow-core photonic crystal fibers. Then, the possibility offered to tailor their optical properties by making tapers will be discussed

High power Raman-converter based on H2-filled inhibited coupling HC-PCF

International audienc

POST-TRAITEMENT DE FIBRES OPTIQUES A COEUR CREUX : DEPOT CONTROLE DE CERAMIQUES FONCTIONNELLES

National audienc

Parametric four-wave mixing in strongly driven Raman molecular gas

International audienc

Novel soliton self-compression spectral dynamics in air-filled Kagome HCPCF

International audienceWe report on a nonlinear compression down to 20 fs in air-filled HCPCF. Novel spectral-temporal dynamic is observed and analysed. The results represent a promising pathway for strong and stable compression of current commercial ultra-short-pulse laser

Sources fibrées à coeur creux pour la génération de paires de photons à faible bruit et à forte brillance

International audienc

Spectral-temporal dynamics of high power Raman picosecond pulse using H2-filled Kagome HC-PCF

International audienc