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We experimentally demonstrate group velocity control of 40-fs, 1400-nm pulses through chi(2)-cascaded interactions under large group velocity mismatch. Group delay shifts up to 50 fs are achieved by propagation in a 25-mm-long PPSLT crystal.
Control of the carrier-envelope phase by a composite glass plate is demonstrated without changing chirp or energy of the transmitted pulses. The effect is verified intracavity employing an octave-spanning laser and external with an autocorrelator.
The development of high finesse resonators for broadband frequency combs enabled the extension of the versatile frequency comb technique into the extreme ultraviolet with all its implications. We describe new developments in this field.
Nonlinearity management is explored as a multilevel tool to obtain maximum transmission reach in a WDM system. A technique for the fast calculation of the optimal dispersion pre-compensation in systems with distributed amplification is proposed.
We present a novel and simple method of producing small core silica holey fibres with nonlinearity close to the maximum achievable. An effective area of 1.6 mum2 with a loss of 0.18 dB/m at 1.55 mum were achieved.
We report on the propagation of high peak power higher-order solitons and their break up due to Raman scattering and third order dispersion over 30 m in hollow core photonic bandgap fibers.
We demonstrate efficient compression of low-power 6 ps pulses down to 420 fs pedestal free pulses at 1.5 mum in an all-fiber scheme employing only 4 meters of As2Se3 fiber and a tailored chirped fiber Bragg grating.
Understanding intermodulation distortion in time-stretch ADC technology is critical to digitization of wideband RF signals. We experimentally and theoretically show the chromatic-dispersion induced power penalty for intermodulation components exhibits a unique frequency dependence.
Nonlinear interactions between optical modes in semiconductor lasers and optical amplifiers perturb optical parameters in the vicinity of a strong mode frequency. This effect is considered in terms of slow and fast light propagation.
A new method allows to extract information on soliton content in complicated cases of pulse propagation in optical fiber, not accessible to Inverse Scattering Transform. As an example, a dispersion-managed second order soliton is demonstrated.
Detailed experimental investigations of the recently discovered temporal soliton molecules are reported. The optical fiber length was now extended; thus stable and unstable regimes of the soliton molecule can be distinguished from another more precisely.
Significant progress in undersea transmission can be made with the use of new modulation formats. High OSNR sensitivity and nonlinear tolerance to dispersion of RZ-DPSK modulation may lead to cost-efficient 10 and 40 Gb/s systems.
We observed frequency tunable modulation instability owing to cross-phase modulation in normal group velocity dispersion regime of a birefringent holey fiber. Sideband shifts were 3-8 THz for polarization and 30-60 THz for modal instabilities.
Optimized cascading of HFs with shortening zero-dispersion wavelengths enabled generation of supercontinua with 1.4 W average power and significant components in the blue (10 dB) and UV from picosecond ytterbium pump sources in a totally fiber-integrated format.
We report on the use of a photonic bandgap fiber for dispersion management of similaritons. The possibility of an all-fiber similariton laser is discussed by comparing the experimental results to a grating compressor.
We present experimental evidence for the formation of nonlinear X-waves in AlGaAs waveguide arrays. These results agree with numerical simulations based on the discrete nonlinear Schrodinger equation with an appropriate temporal dispersion term.
We observed that the chromatic dispersion induced modulation suppression cannot be successfully eliminated by precise dispersion compensation in a high power link. Instead, lower dispersion compensation is more preferred since it improves the system performance.
An analytic model of chirped-pulse amplification is presented. The model is used to optimize the peak power in fiber chirped-pulse amplification, in which the interplay of nonlinearity and third-order dispersion plays a major role.
We show that in specially designed nonlinear waveguides with phase-shifted Bragg gratings it is possible to realize the frequency-independent spatial diffraction in the vicinity of band-gap, allowing for efficient spatio-temporal self-trapping of slow-light bullets.
We propose a novel implementation of true time delay (TTD) using highly dispersive (800 ps/km.nm), air-guiding photonic bandgap fibers(PBGFs) which has advantages of low insertion cost, compact size, high immunity to nonlinear effects, and low temperature sensitivity.
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