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.
Short-pulse fiber lasers based on dissipative-soliton formation offer major performance and practical advantages over prior fiber lasers. Recent developments will be reviewed.
Through nonlinear scattering including stimulated Raman scattering and beam cleanup, a pulsed multimode pump beam is converted into a nearly diffraction-limited supercontinuum extending from 1 to 2 µm in a passive cladding-pumped nonlinear fiber converter.
Two coherent 1.5 μm frequency combs are transferred to 3.4 μm by difference-frequency generation with a 1064 nm cw laser. From a multi-heterodyne measurement, the residual linewidth between the comb teeth is resolution-limited at 200 mHz. Work of the U.S. government, not subject to copyright.
We present a mid-infrared frequency comb generated via differency frequency mixing of a Yb femtosecond fiber laser. After passing through a methane gas sample, the MIR comb is upconverted and dispersed onto a CCD for detection.
The capacity demands for future undersea cable networks will push the industry to WDM spectral efficiencies in excess of 1-B/s/Hz. This will require significant progress in optical fibers and signal processing.
We experimentally demonstrate a novel scheme for generating pump and idler optical waves phase aligned to an input signal carrier for phase sensitive amplification.
We report on the generation of high-energy femtosecond pulses from an ytterbium-doped photonic crystal fiber oscillator. Sub-150 fs pulses are obtained at low-cavity dispersion. By increasing the normal cavity dispersion, pulse energy exceeds 100 nJ.
We report a mode-locked Thulium fiber oscillator that generates 4.8-nJ pulses at center wavelength of 1935nm with duration of 235fs. The anomalous dispersion in the cavity is compensated with the insertion of Er-doped fiber.
We generate 800-nm, sub-7-fs pulses from a degenerate Optical Parametric Amplifier pumped by the second harmonic of a Ti:sapphire system and seeded by supercontinuum generated by a near IR OPA pumped by the same source.
We report a highly versatile gas phase technique for making ytterbium doped silica fibers. Initial results generated 200W output power with a slope efficiency of 72%.
The generation of self-similar parabolic pulses (similaritons) has so far only been obtained in single-pass Raman amplifier configurations [1, 2], or in rare-earth doped fiber lasers [3, 4]. We report here the first demonstration of a mode-locked parabolic pulse fiber laser, which can potentially be run at any wavelength using Raman gain. This new all-fiber ring similariton laser scheme (cf. Fig....
Ultra-high reflectivity is achieved at the end-face of a hollow-core PCF via the insertion and fusion of a metal-coated tapered single-mode-fiber to the core of the hollow fiber. Saturable absorption is demonstrated using this device.
We demonstrate amplification of femtosecond pulses in large mode area singlemode Yb-doped photonic bandgap Bragg fibers. 260 fs 5 µJ pulses are obtained at 100 kHz repetition rate (1 W of average power).
We demonstrated novel all-optical signal regeneration using pulse trapping. Amplification, re-timing, and pulse shaping were demonstrated in only a 140 m-long standard low birefringent fiber. A large gain of 20 dB was observed.
Multifilament fiber core (MFC) design enables low NA fiber using high index materials. We study the scaling of MFC effective area using an effective step-index model. MFC fiber mixes step index and multicore fibers properties.
The noise limits of phase-preserving NOLM-based regenerators from Rayleigh backscattering and possible improvements are investigated. Applying optimizations a four fold increase in the number of cascaded regenerators was achieved for a DPSK transmission system.
We proposed a hybrid fiber Raman/parametric amplifier which can have significant gain enhancement over that of a Raman-assisted fiber optical parametric amplifier using the same length of fiber, Raman and parametric pump powers.
200-fs 2.5-mJ pulses from a cw-diode-pumped Yb:CaF2 MOPA are spectrally broadened in Ar and recompressed to 30 fs at 980 nm using a prism pair. Multi-millijoule 12-fs pulses are feasible upon higher-order spectral phase correction.
The first soft x-ray laser pumped by laser diodes is reported. Lasing was achieved on the 18.9 nm line of nickel-like molybdenum pumping with a Yb:YAG chirped pulse amplification system with 1 J energy.
We present a subpicosecond, 200 GHz-repetition rate, passively mode-locked laser based on high-harmonic four-wave mixing in an integrated CMOS-compatible high-Q nonlinear ring resonator.
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.