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6H- and 3C-SiC layers were grown using a sublimation based process. The polytype balance is mainly given by the substrate orientation and growth temperature. This paves the way to use 6H- and 3C-SiC in optoelectronic applications.
We fabricated high efficiency LEDs with embedded micro-scale air voids and SiO2 nanomask exhibit smaller reverse-bias current and great enhancement of the light output (65% at 20mA) compared with the conventional LEDs.
We determine the radiative transition between the 4f levels of Eu3+-ion near silver nano-film. Propagating surface plasmons induced by the Ag nano-film enable the electric dipole transition of the Eu3+ ion to be enhanced.
We used polarized light imaging and optical coherence tomography to quantify anisotropy in normal ex-vivo rat bladder during distension. The anisotropy change is due to microstructural remodelling during distension rather than thickness change.
An optical tapered microfiber is used to collect photoluminescence of semiconductor quantum dots in photonic crystals at cryogenic temperature (∼8K). Curved-microfiber coupled system dramatically enhances collection efficiency by several times.
We experimentally investigate the possibility of exploiting optical transparency and favorable thermal behavior of silicon carbide for atom chips, and discuss potential applications including high numerical aperture detection through the chip.
Compared with As20S80, P2As20S78 film waveguide deteriorates the response behavior of recovery propagation and mainly performs the slow later stage in recovery propagation process. However, for Sn1As20S79, it can improve evidently the fast earlier stage in the recovery propagation process to shorten response time to the milliseconds level, and also reduce the optical propagation loss. Experiments...
We present a micro-integrated narrow linewidth extended cavity diode laser for Rubidium (780.2 nm) atom interferometry experiments in space. The laser is designed for use onboard a sounding rocket to be launched in 2013.
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.
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.
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