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In this paper we present a 58 kHz fundamental repetition rate 3.5 km long EDFL mode-locked by SWCNT saturable absorbers. Because laser nonlinearities and accumulated dispersion, we observed chirped soliton-like 6.79 ps pulses with 0.49 nm spectral width. This is the lowest repetition rate in EDFL, to the best of our knowledge.
We numerically analyze broadband (up to 60 nm) conversion of transverse modes with long-period fiber gratings that are transiently introduced via the optical Kerr effect.
We demonstrate the first real-time self-homodyne coherent receiver for 10.66Gbit/s BPSK signals using an OEO based carrier extraction scheme without using any pilot tone.
A new approach for defect inspection and properties evaluation of indium t in oxide (ITO) conducting glass is demonstrated with optical coherence tomography (OCT). With OCT scanning, the defects can be clearly identified at the different depths. Besides the morphological information, several parameters also can be estimated including the thickness of glass, group refractive index, reflection coefficient...
Brillouin scattering effect in a colorless 25-km bidirectional WDM PON is experimentally evaluated. Downstream 10-Gb/s DPSK signal is directly received with a novel FBG, seeding an R-SOA at the ONU, for upstream 1.25-Gb/s OOK transmission.
We demonstrate a stable passively mode locked soliton laser that extends the Dissipative-FWM concept, in a highly nonlinear, CMOS compatible integrated micro-ring resonator. Operation at 200GHz, free of supermode instability, is demonstrated.
A clock recovery scheme simultaneous providing polarization de-multiplexing is proposed and demonstrated in a 160-Gbit/s polarization multiplexed NRZ-DQPSK system by employing optical domain frequency down-conversion with standard RF devices.
We show that coherent carrier transport in quantum cascade lasers (QCLs) decreases as temperature increases due to a corresponding decrease in the quantum coherence time between the injector and active region levels.
We propose an all-fiber thulium-doped wavelength tunable mode-locked laser operating near 2 μm. Reliable self-starting mode locking over 50nm tuning range is observed using fiber taper based carbon nanotube (FTCNT) saturable absorber (SA). Spectral tuning is achieved by stretching another fiber taper.
We employ nonlinear metamaterials to demonstrate alternative quasi-phase matching (QPM) methods not feasible in natural materials. Additionally, we propose a method for dynamic QPM via resonance tuning, allowing for a tunable frequency of operation.
A novel experimental technique based on the study in the phase plane of real-time series is used for a first experimental analysis of the stability of period-one microwave frequency oscillations generated with an optically-injected 1550nm-VCSEL.
PMD mitigation in 2×10-Gb/s RZ-OOK PDM systems is demonstrated through a single all-optical-regenerator with polarization-diversified loop configuration. 3.0-dB eye-diagram-based SNR improvement is achieved in the presence of 6.3-ps DGD for RZ signals with 18-ps pulsewidth.
We report on the near- and far-field investigation of the Slow Bloch Mode associated with the point of the Brillouin zone, for an active honeycomb lattice photonic crystal, using near-field scanning optical microscopy.
We show that the linearity of a silicon electro-optic modulator can be improved by optimizing the embedded diode structure. Optimized designs of silicon modulators can give 5.9 dB improvement in SFDR over conventional LiNbO3 modulators.
We develop a novel physically transparent model that establishes unequivocal connection between surface plasma polariton (SPP) modes and sub-wavelength imaging in the super-lens, and use it to analyze the modulation transfer function.
The sensitivity of a nanophotonic device's performance with respect to changes in its shape and size can be efficiently obtained by adjoint FDTD. By optimizing the structure's boundary we constrain resulting designs to be fabricatable.
We demonstrate an electrical-field cross-correlation imaging technique to obtain a response function of localized plasmon. Based on the measured response functions, we spatiotemporally shape the plasmon by shaping the femtosecond excitation pulses.
We proposed a near-infrared nano-imaging spectroscopy of semiconductor quantum structures using a phase change mask layer. The performance of this method was demonstrated by numerical simulation and photoluminescence measurement of quantum dots.
We designed and characterized a high performance narrow band FIR filter based on the low loss High Contrast Grating (HCG) Hollow-core Waveguides (HCW) with at least 30 dB rejection and 0.1 dB power leakage.
Narrow, circularly-polarized microcavity resonances were observed for the first time in the fluorescence at the photonic band-edge of glassy chiral liquid crystal microcavities both undoped and doped with quantum dots irradiated by a cw-laser beam.
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