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We have obtained record gain of 60 dB with a continuous-wave two-pump fiber optical parametric amplifier, over a 5.5-nm bandwidth. We used a 500-m long fiber, and 1.5 W of pump power.
We propose a novel scheme for multilevel (9 and more) amplitude regeneration based on nonlinear optical loop mirror and demonstrate its efficiency and cascadability on 256-symbol constellation.
We report an all-fiber continuous wave source, tunable between 1935–1980nm, based on parametric conversion combined with thulium amplification. More than 150mW of power and 30dB optical signal-to-noise ratio is obtained over the entire range.
We demonstrate two high-dimensional QKD protocols — secure against collective Gaussian attacks — yielding up to 8.6 secure bits per photon and 6.7 Mb/s throughput, with 6.9 bits per photon after transmission through 20 km of fiber.
We present simulations of rates for a quantum key distribution scheme using a frequency multiplexed repeater architecture with broadband solid-state quantum memories. We find that key can be generated over 1000 km with eight elementary links.
Arraying fiber lasers is being focused for power and energy scaling and multicore fibers can be a promising format. Phase locking in evanescently-coupled multicore fiber lasers by various in-phase mode selection methods is presented.
Simulations show that resonant shunt cores for suppression of higher-order modes in hollow-core fibers can be applied broadly, to cores larger than 19-cell and core thicknesses larger than half the lattice web thickness.
We introduce a technique for stabilizing and enabling continuous phase control of fiber-based time-bin entanglement interferometers. This technique reuses the pair creation pump, which coexists with and co-propagates with the entangled photons.
We demonstrate transmission of entangled photons through a χ(3)-based 5-km distributed optical amplifier operated in the low-gain limit to offset loss. No measurable degradation in entanglement quality is observed after the amplifier.
We demonstrate a 160 mW output, 13C2H2 frequency-stabilized erbium silica fiber laser. The frequency stability reached 8.8×10−12 for τ=100 s. Furthermore, a linewidth of 5 kHz and a RIN of −130 dB/Hz were simultaneously achieved.
Recent progress in low-noise optical amplification and signal processing has raised prospects of practical devices operating below the conventional quantum limit. We review basic principles, practical implementation, and performance of such devices.
Precise time recovery on arbitrary point of fiber-optic link with λ-dispersion-induced RF phase locking assistance is proposed. Experiments have demonstrated the time deviation of 8.34ps@1s averaging and 0.592ps@103s averaging within a 30-km fiber loop.
We discuss the design and implementation of a receiver for the Lunar Laser Communication Demonstration based on a 12-pixel array of tungsten silicide superconducting nanowire single photon detectors. The receiver was used to close a software communication link from lunar orbit at 39 and 79 Mbps.
We demonstrated a near all-fiber femtosecond Yb:laser frequency comb incorporated with three different photonic crystal fibers. The comb removes most of free-space components so that it is more compact and stable.
We present all-optical distortion cancellation in phase-modulated analog-photonic links by combining the phase-encoded signal with lines from an optical comb generated from signal. Experimentally, we fully cancel third-order distortion increasing the link SFDR by >8.3dB.
We study polarization dynamics of a harmonic mode-locked erbium-doped fiber laser with carbon nanotubes absorber. New types of vector solitons are shown for multi-pulse and harmonic mode-locked operation with locked, switching and precessing polarization states.
We demonstrated an Erbium-doped fiber laser operating simultaneously in two distinct regimes, CW and active mode-locking at 1.8 GHz with pulses of 38 ps. The lasers wavelengths can be tuned in both regimes.
We demonstrate photon pair generation in the telecom O- and L-bands thru spontaneous four-wave mixing in fiber. These wavelengths have low loss in fiber and are widely detuned from the pump, which simplifies filtering and reduces Raman.
Optical refrigeration provides the only solid-state technology capable of reaching cryogenic temperatures, currently below 100K. Novel, adaptable designs are implemented for technologies requiring vibration-free cryogenic operation.
Plasmonic assisted nanodetectors and LEDs may be the only solution for power efficient onchip optical communications - the holy grail of integrated photonics. Localized plasmons in novel detectors and fast LEDs will be described in detail.
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