The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We propose a compact and robust laser system for onboard rubidium atomic interferometry usefull for atomic inertial sensors. Our system is based on the second harmonic generation of a telecom fiber bench at 1560 nm.
Peculiar dynamics of high repetition rate regenerative amplifiers limits the system power efficiency. A basic model of regenerative amplifiers dynamics and experimental verification of operation efficiency are presented.
Tunable optical combs spanning the 6.5-8.5 mum range are obtained as a result of a difference-frequency-generation process between pulse-trains emitted by an amplified 100 MHz Er-fiber oscillator with unprecedented average power of tens of microwatts.
We report on a pulsed bulk-fiber source producing a peak power of 100 kW at 100 kHz and an average power of 20 W. An SHG efficiency of 51% was obtained by a LBO crystal.
Refractive index changes induced by pump-signal operation in commercial Yb-doped fibers are shown to be of electronic origin with a strong contribution of UV-transitions to the polarizability difference explored for testing wavelength of 1460-1620 nm.
We will discuss the status of high repetition rate high energy femtosecond fiber laser systems, review their scaling potential in terms of average power, pulse energy and peak power. First micro-machining applications demonstrate the potential of this laser technology.
We report on all-fiber coherent combining of 1.55 mum Er-doped single mode amplifiers achieved by means of active phase control that specifically employs the refractive index changes in Yb-doped fiber induced by 980 nm laser diode.
We have demonstrated the second harmonic generation with output pulses of a 50 kHz Ti:sapphire regenerative amplifier. 280 fs pulses with an average power of 3.1 W were generated at 389 nm.
An alternative to the sub-100 MHz repetition rate laser source is explored. A low noise SCOWA-based harmonically mode-locked laser is developed and temporally demultiplexed to twice the cavity fundamental resulting in a 40 MHz pulse train.
We have experimentally, for the first time, demonstrated one-pump optical fiber parametric amplification (OPA) in bismuth-oxide-based highly nonlinear fiber (Bi-HNLF), and realized narrowband (0.75 nm) and tunable gain spectrum as high as 58 dB.
20 muW of average power at ~18 mum is generated by difference frequency mixing the 300 mW, two-color output of a Yb:fiber amplifier. The mid-infrared power was not limited by two-photon absorption allowing it to be scaled.
We built an ultra stable coupled optoelectronic oscillator using a slab coupled optical waveguide amplifier, generating pulses at 10.24 GHz with a repetition rate drift of only 513 Hz in 10 minutes without active stabilization.
In a passive optical network signalling and monitoring are very important architecture functions. The modulation of a booster amplifier laser diode pump can assist this function without corruption of downlink signals towards subscribers.
We report on a fiber amplified passively Q-switched microchip-laser delivering 85ps, 3MW pulses with 105kHz repetition rate. An all-optical synchronization technique reducing the mean pulse to pulse jitter of the microchip laser to 40ps is demonstrated for the first time. In comparison with existing setups at comparable average powers, the repetition rate is nearly on order of magnitude higher and...
We have developed a numerical simulation of cw-pumped Yb3+-doped fiber amplifiers seeded by pulses at 1064 nm. Results compare well to measurements of longitudinal upper-level ion populations and of output pulse energy versus pump power.
We report design and results on realization of an asymmetric co-axial dual-core fiber for an inherently gain flattened EDFA with median gains ges 28 dB and gain excursion within plusmn 2 dB across the C-band.
A chirp-controlled nanosecond-pulsed tunable optical parametric oscillator and two-stage Ti:sapphire amplifier generate high-power coherent light at ~840 nm, with frequency stability and narrow optical bandwidth as needed for high-resolution ultraviolet spectroscopy.
Stimulated Brillouin scattering, stimulated Raman scattering, four-wave mixing, self phase modulation, self focusing, and optical dielectric breakdown limit the power obtainable from fiber amplifiers. We explore the limits on nanosecond pulse amplification in LMA fibers.
The efficient Raman amplification (amplification was up to 1600) of low divergent first Stokes radiation was demonstrated. The amplified pulse energy was up to 63 mJ at pump energy of 208 mJ.
We demonstrate threefold increased autocorrelation peak from an Yb-fiber CPA system operating with strong self-phase modulation by pre-shaping the pulse spectral-phase. The adaptive control loop used feedback from the output autocorrelation. High-quality 800 fs, 65 muJ recompressed pulses were produced.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.