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Single photons are efficiently collected based on a tunable microfiber-coupled photonic crystal cavity with an embedded InAs quantum dot. 25% of total fiber collection efficiency is obtained. Tunability of the cavity and Purcell-enhanced spontaneous emission rate are also observed.
Integration of UVA-developed high power photodiodes into a novel RF package co-designed with a wide-bandwidth, fragmented aperture antenna for fiber-fed, array antenna applications.
We reported special variations of optical spectrum of soliton pairs in a passively mode-locked erbium-doped fiber laser by adjusting the polarization controller with pump power fixed, which indicates different time separations within soliton pairs.
Optical characterisation of a Nephila edulis spider dragline silk is performed. The silk fiber transmits light up to 1400 nm with a propagation loss of ∼9 dB/cm and birefringence of 8×10−3 measured at 1302 nm.
This paper aims to propose an improved Independent Component Analysis (ICA) method to identify the input polarizations that carry two different channels, but are mixed randomly while the light is propagating in the optical fiber.
We have proposed high-speed pre-equalizing electro-optic modulators, which can compensate for signal distortion caused by fiber dispersion utilizing velocity-mismatched traveling-wave electrode and polarization-reversed structures. Pre-equalization for 40Gb/s QPSK signals using double Mach-Zehnder waveguides is presented.
The use of a polarization modulator for intensity modulation is detailed. Issues encountered are discussed such as the state of polarization drift over time for various fiber lengths and the nonlinear effects of polarization dependent loss on link fidelity.
Polarization effects in different types of optical microresonators are studied in detail. It is observed that microresonators with tighter axial power confinement, such as MBRs and micro-milled resonators, show larger cross-polarization coupling efficiencies.
We propose a novel QPSK regenerator scheme based on phase sensitive amplification of a pre-conditioned signal avoiding active phase-locking. Signal pre-conditioning is demonstrated experimentally with error-free (BER < 10−9) performance for a 10-Gbaud QPSK signal.
Few-mode fiber (FMF) has recently attracted much interest due to the additional freedom in the spatial domain. In this talk, we report our recent progress on FMF based optical sensors. We show two types of FMF sensor, and then demonstrate the potential of multi-parameter sensing.
We show transmission experiments of 16-Nyquist-WDM 6-mode-multiplexed DP-QPSK signals over 9.8-km 6-mode 19-core fibers. The record spatial multiplicity of 114 and the aggregate spectral efficiency over 345 bit/s/Hz have been achieved.
We demonstrate for the first time a graphene-based passively Q-switched Tm3+:ZBLAN all-fiber laser at 1480 nm. Pulses with a duration of ∼ 9 µs, repetition rate of 29.9 kHz, and energy up to 447.16 nJ are obtained.
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