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Sub-picosecond, transform-limited pulses with parabolic optical intensity profile were generated for fiber based chirped pulse amplification (CPA) systems. By utilizing parabolic pulse shaping with both spectral intensity and phase modulation, pulse peak power was increased by a factor of 5 when using chirped fiber Bragg gratings (CFBG) stretcher, and by a factor of 6.2 with a fiber spool stretcher...
Monolithic integration of deeply-scaled silicon optical components with CMOS analog and mixed signal circuits has high potential to provide cost-effective and low-power optical interconnects for various applications spanning from Ethernet links in new generation datacenters, to optical backplanes in servers, and extensive parallelism in high-performance computing systems by connecting together racks,...
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 will present state of the art performance of monolithically integrated 500 Gb/sec and 1 Tb/s coherent transmitter and receiver PICs with integrated multi-channel tunable laser arrays optimized for coherent transmission.
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.
The effects of thermally-induced refractive index change on distributed modal filtering rod-type photonic crystal fibers are numerically investigated. Results have shown a significant blue-shift of the single-mode range for increasing temperature.
Reported here are optical fibers exhibiting significant longitudinal changes in optical properties over short lengths. The Brillouin gain is found to decrease by over 6 dB relative to a standard optical fiber as a result
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.
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 single frequency, mode hoping free, narrow linewidth laser system has been developed to generate high repetition rate picosecond UV pulses with MW peak power. Preliminary measurements have shown the generation of 402.5MHz/80ps pulses at high extinction ratio and single frequency operation. The laser parameters are promising in the application of laser assisted H− beam stripping at the Spallation...
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.
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 present active phase-locking of fiber amplifiers using Walsh coded modulations. Numerical simulations demonstrate the potential of this technique to tag multiple fibers with a single frequency and enhance power scaling capability.
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.
The experimental results of a fully fiber-remoted millimeter-wave wireless link are presented. A 3 Gb/s rate with a BER of 10−3 for a received power of −45 dBm/subcarrier is achieved using 3 16-QAM subcarriers.
All-fiber-based narrow linewidth nanosecond pulsed lasers in MOPA configuration are reviewed, and their applications in nonlinear frequency conversion are discussed.
Concept feasibility of a photonics-enabled Ka-band subscale “radar” is demonstrated for ranging. Experimental results using a corner cube reflector and stretch processing are presented, with a 28-GHz carrier modulated by 40-ns, 4-GHz chirp pulses.
All-optical 2R regeneration of a 160-Gbit/s RZ-OOK signal is demonstrated in a fiber optical parametric amplifier using a highly nonlinear fiber with the data as pump. Bit error rate bathtub curves validate the regeneration performance.
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