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.
Laser emission into modes of a dielectric microsphere was observed from optically pumped HgTe quantum dots on its surface. Including real-time measurement of the input pump losses reveals nanowatt threshold levels for these lasers.
Cross-phase-modulation-induced pulse delay or advancement in an optical fiber is analyzed. It is shown that XPM and group-velocity mismatch can lead to controllable pulse delay or advancement with negligible frequency shift.
Pulses from an ultrafast oscillator are conditioned, amplified, and delivered in an all-optical-fiber architecture. Combined with an electro-optic receiver, the complete system delivers a 4-V electrical trigger with less than 400 fs additive jitter.
The optical properties of rare earth doped silver halide crystals were studied in the middle infrared spectral range. The results indicate that these materials are promising candidates for development of mid-IR fiber lasers and amplifiers.
A novel type of hybrid amplifier/wavelength converter is presented, coupling a TDFA and a FOPA module in series. Signal amplification over the entire S-Band (1450-1530 nm) and signal-to-idler conversion from 1540-1630 nm is demonstrated.
Powerful ultrashort pulses are generated using a hybrid MOPA consisting of a passively mode-locked semiconductor laser and a Yb-doped fiber amplifier. Pulses 2 ps in duration are amplified to an average power of 0.8 W.
A practically tunable multiwavelength Raman fiber laser based on few-mode fiber Bragg gratings with dynamic range of more than 15 nm is investigated. We achieved a high extinction ratio of more than 45 dB.
A cladding-pumped, high-power amplifier was built incorporating a star-shaped, Ybdoped filter fiber. Pulsed amplifier measurements demonstrate strong suppression of stimulated Raman scattering accomplished by a special index profile with an up-doped ring.
We present characterization of a fiber laser based on newly developed erbium and ytterbium doped double-clad fiber with cross section tailored for direct splicing with the pump and signal fibers.
In the pulse application, a significantly increased efficiency of high power largemode area fiber amplifiers is demonstrated by improving the overlap of the doped region with the fundamental mode of the fiber.
Brillouin properties of doped fibers are reported for the first time. The characterized fibers present Brillouin frequency shift variation that we attribute to fiber composition. A thermally induced evolution of Brillouin spectrum has been observed.
We report a high power diode-pumped mid-IR fiber amplifier at 2.7 mum. 4.6 W amplified signal was obtained for an input signal of 110 mW, corresponding to a net gain of 16.2 dB.
We demonstrate for the first time the low penalty cascaded performance of a 1.3mum QD SOA. Eleven passes are feasible for 10Gb/s data while maintaining a Q-factor exceeding 6 for filter-free operation.
We have derived an explicit analytical expression for the gain of a Brillouin fiber amplifier operating in the depleted pump regime. The accuracy of the obtained formula is validated both numerically and experimentally.
A fully integrated self-referenced Er-fiber frequency-comb system without the use of highly nonlinear or microstructured fiber is demonstrated. We use a single PPLN-waveguide for both spectral broadening and 2f-to-3f CEO-phase detection.
We demonstrate a muW-level broadly tunable THz source based on parametric down-conversion in orientation-patterned GaAs pumped by femtosecond pulses from a Tm-doped fiber laser. Generated THz powers should be scalable to mW-levels with this approach.
Employing all-optical means to prepare phase-coherent input signal-idler pairs, we implement a multichannel in-line phase-sensitive fiber-parametric amplifier. Feasibility of three-channel operation using a single pump is demonstrated.
Nonlinear phase noise (NPN) in polarization-division-multiplexed DPSK systems is analyzed. It is found that the absolute NPN is inversely proportional to the square-root of channel spacing, while the differential NPN depends on the launch condition.
We demonstrate propagation and compression of 14-nJ, 152-fs pulses in the 2100-mum2 effective area, LP07 mode of an intentionally multi-moded fiber. The 12-m length of fiber was coiled to a radius of curvature of 7.5 cm.
We report on the quality of ultrashort pulses that are generated by a chirped pulse fiber amplification system when different pulse shapes are amplified. We focus thereby on sech2, parabolic and experimental parabolic pulse shapes.
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.