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We proposed a smooth evolution scheme from conventional TDM-PON to TDM-OFDM-PON. We show by experiment that a TDM-OFDM-PON OLT can support upstream and downstream transmissions for conventional TDM-PON ONUs to achieve cost-effective.
A 10-Gbps uplink transmission in WDM-PON is realized in this paper with good performance, in which band-limited RSOAs are applied to Colorless ONUs and Mach-Zehnder Interferometers are used as two-tap optical equalizers before the receivers.
800-nm pumped BIBO OPAs using Type-I and Type-II phase-matching are investigated and compared for achieving sub-50-fs pulses in the NIR. The OPAs achieve their shortest pulse durations of 19.8fs and 41.3fs, respectively, at 1.8μm.
We demonstrate efficient mode convertors for guided transverse electric (TE) and transverse magnetic (TM) modes on sub-wavelength plasmonic waveguides. Efficient mode conversion is important for realization of multi-functional optical nanocircuits and surface plasmon amplification.
The efficiency and beam quality of double-pass cross-polarized wave generation is improved by using imaging to better match the two fields for the second pass. The efficiency increase is especially pronounced for low input energy.
The talk presents the initial evolution of the heterostructure idea in the years 1954–1963. Originally proposed for improving bipolar transistors, heterostructures made it possible to achieve cw laser at room temperature.
In this paper we will discuss our development effort on a highly efficient master oscillator power amplifier (MOPA) laser transmitter for future space flight lidar missions.
Continuous wave and nanosecond pulse amplification in a higher-order-mode, Er-doped-fiber amplifier with 6000 μm2 effective area is demonstrated. Both 1480nm pump and 1560nm signal propagate in the LP0, 14 mode.
An optical lattice formed by reflection from a SiNx membrane creates a bidirectional coupling of atomic and membrane motion. We measure the influence of the atoms on the membrane and explore causes of mechanical dissipation.
Near-field binary beam shapers based on error diffusion have demonstrated a damage threshold higher than 30 J/cm2. Their fabrication tolerance and operation with broadband pulses are investigated for application to short-pulse high-energy lasers.
We have built an optomechanical device consisting of a fiber-based optical cavity and a silicon nitiride membrane with the goal of observing radiation pressure shot noise and generating squeezed light at room temperature.
We independently measure the optical phase and amplitude modulation characteristics of an injection-locked VCSEL for the first time at GHz rates, using a coherent optical demodulation scheme, giving us insight into two different phase modulation regimes.
An electronic dispersion compensation scheme based on coherent optical receiver and digital signal process is introduced in the fiber link timing distribution system. Then the timing error caused by dispersion can be significantly decreased.
We analyze the structure of space-time focusing of spatially-chirped pulses using a technique where each frequency component of the beam follows its own Gaussian beamlet that in turn travels as a ray through the system.
We experimentally demonstrate light-matter interactions on a chip, consisting of a silicon nitride wave-guide integrated with rubidium vapor cladding. The measured absorption spectra provide indications for low light nonlinear interactions.
We demonstrated a femtosecond fiber laser directly delivering high power diffraction-resistant wavepacket. Bessel-Gauss reshaping was obtained by an integrated shaper fabricated on fiber-end by focused ion beam combined with a spherical lens.
We demonstrated the above-threshold regenerative optomechanical behavior of an airslot photonic crystal cavity. The experimental optomechanical coupling rate gom/2π is ∼154 GHz/nm. The parametric oscillations and phase noise are shown.
We observed singly-resonant, 4-quasi-phasematched, second-harmonic generation in a GaAs microdisk cavity. By pumping at the 1985.4-nm fundamental resonance, we observed (5.2±0.4)×10−5/mW conversion efficiency.
We demonstrate quasi-phase-matched four-wave-mixing in silicon nanowires with sinusoidally modulated width. We observe ∼11 dB conversion efficiency enhancement for targeted wavelengths >100 nm away from the edge of the 3-dB conversion bandwidth.
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