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Abstract: We demonstrate a cost-effective and efficient approach for realizing ultrafast time-stretch microscopy in 1µm using the standard telecommunication single-mode fibers (e.g. SMF28 and dispersion compensation fiber (DCF)) as few-mode fibers (FMFs).
A hybrid Raman-OPA amplifier with 190 nm bandwidth, and <4dB gain ripple is described. We also show that inclusion of the forth order dispersion coefficient is critical for the correct optimization of the gain bandwidth of the hybrid amplifier.
By means of numerical simulations, we do a comparative study of different timing synchronization techniques for optical OFDM Intensity Modulated/Direct Detected (IMDD) transmission in single-mode fiber channel. Based on Park's method, we propose some modifications to obtain a more robust timing estimator.
Employing a nanotube-based saturable absorber, we demonstrate a continuously tunable (1533–1563nm) ultrafast fiber laser, with output pulsewidth switchable between picosecond (1.2 ps) and femtosecond (610 fs) regimes.
We review reduced-complexity nonlinear compensation methods and find that filtered backpropagation and equivalent-span backpropagation enable large complexity reduction for dispersion managed and unmanaged systems.
Tunable intracavity phase modulation is applied to an all normal dispersion fiber oscillator to suppress wave-breaking and increase the pulse energy. Spectral broadening beyond 1200–2000nm is achieved by 15-m-long high nonlinear fiber.
We demonstrate a dual-wavelength, carbon nanotube mode-locked Er fiber laser. The laser outputs two wavelengths at 1549nm and 1562nm, and each wavelength corresponds to pulse duration of ∼1.3ps and repetition rate of ∼11.27MHz.
We numerically design silica cladding chalcogenide core (As2S3) step-index fiber by solving the nonlinear Schrödinger equation to achieve broad supercontinuum over mid-IR(1000nm–4800nm) range in a 1-cm long fiber, pumped by 60fs pulses at 1550nm.
We discuss the physics of optical event horizons and clarify how the horizon dynamics can be naturally interpreted in the framework of wave mixing between a soliton and a weak linear wave.
We experimentally investigate the 60 GHz double-sideband radio-over-fiber link. We present the bit error rate performance of the system for HD video transmission in the access architecture and the phase noise measurements for metro-access scenarios.
An all-optical, UWB doublet pulse generation scheme based on nonlinear optical loop mirror with parametric amplification is experimentally demonstrated. The scheme is shown to be capable of producing high quality UWB doublet pulses.
We present measurements and theoretical work demonstrating the drastic reduction of polarization instability driven noise, improving the stability of polarized supercontinuum generated in all normal dispersion highly nonlinear fiber
We review the technique of spectral beam combining and discuss detailed limitations in the laser systems used for combination of multiple cw and pulsed fiber amplifiers to kW average power and mJ's of pulse energy.
Unrepeatered transmission of 12 × 120 Gb/s PM-NRZ-QPSK signals over the legacy spans has been demonstrated. Transmission has been achieved by forward and backward distributed Raman amplification using 100G channel card with real-time ASIC processor.
We report monolithic, tunable 1550-nm HCG-VCSELs with 26.3 nm continuous tuning. Room temperature power of 2.3 mW, 85 °C power of 0.5 mW, and 10 Gb/s direct modulation over 100 km of fiber is demonstrated.
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