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Stable octave-spanning supercontinuum (SC) in the mid-infrared (MIR) region finds extensive applications in spectroscopy, metrology, biochemistry, etc. The absorption of conventional silicon- or silicon oxide-dominated nonlinear media makes SC generation in MIR region technically challenging. In this paper, we propose ultrabroadband MIR-SC generation using a suspended germanium-membrane ridge waveguide...
We demonstrate the formation of an amorphous chalcogenide photonic crystal light emitter by using a microtrench filling method and solution processing.
Coherent optical communications leveraged the fundamental philosophies and building blocks of mature wireless/copper-wire DSP technologies and has been a huge success with polarization-multiplexed QPSK at 100Gb/s per channel transponders currently in wide deployments. We discuss on further advances in DSP techniques to enable single-carrier transmission approaching 1 Tb/s as well as software-defined...
This paper reveals that nonlinear propagation is a critical problem for the long term evolution (LTE) technology based on the radio-over-fibre (RoF) system. Therefore, a direct modulation based frequency dithering (DMFD) method is proposed for nonlinear propagation compensation, namely the self phase modulation (SPM) and stimulated brillouin scattering (SBS). We found that DMFD method operates substantially...
We present a frequency offset estimation using a residual carrier that is a by-product of our previous generation technique[1]. The offset range is extended to half of the symbol rate and is resilient to filtering.
Dual-polarization distributed Bragg reflector (DBR) fiber laser with a stable low beat frequency at ∼20 MHz together with frequency tunable and multiplexing capability for ultrasound detection has been proposed and demonstrated.
We demonstrate a stable photonic RF phase shifter based on a DGD element and a polarization sensitive optical phase modulator. The phase shift can be tuned linearly over 360° with a low electrical control voltage.
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