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High-speed vertical-cavity surface-emitting lasers (VCSELs) are important for optical data transmission applications. Modulation bandwidth for free-running VCSELs typically ranges from few to twenty GHz. An interesting discovery is that modulation bandwidth may be appreciably improved with coherently coupled arrays [1,2]. Recently we reported the ability to tune 2–1 phased, photonic crystal VCSEL...
A new quantum well, namely InGaAsP/InAlGaAs, is used for electroabsorption modulator. High band-offset ratio between well and barrier induces strong exciton effect, leading to low fiber-to-fiber loss of −8dB, >25dB extinction ratio, and >30GHz bandwidth.
An optical frequency-interleaving full-duplex transmission of 96-GHz-band frequency-modulated continuous-wave downlink signal and 10-Gb/s on-off-keying uplink signals is investigated. The proposed full-duplexing transmission with a flexible wavelength channel selector over 10-km fiber-optic link is experimentally demonstrated.
A photonic integrated circuit comprising multi-mode interference couplers and phase modulators is proposed for frequency 8- and 24-tupling. Simulations of the dc-less and filter-less architecture show over 69 dB of signal to unwanted harmonic ratio.
We theoretically investigate mode area scalability in a bent rectangular-core fiber. We discuss designs that mitigate bending effects and promote robust FM operation. We show that fiber fabrication is possible through conventional routes.
We demonstrate 16.2 dB gain in a high-linearity 20 GHz IM/DD analog photonic link by utilizing a quadrature-biased dual-output Mach-Zehnder modulator and a high-power balanced photodiode.
In high speed optical networks, quantifying both the intensity and the frequency behaviors of optical signals has become a crucial task to evaluate transmission performance. In this letter, we report on a new technique to characterize optical signals. It is based on low cost components and its operating mode is easy to provide accurate and fast measurements. The proposed technique is experimentally...
We propose a novel hybrid pulse amplitude modulation single carrier frequency domain equalization (PAM-SC-FDE) system that outperforms similar unipolar systems in terms of bit error rate (BER), bandwidth efficiency, and peak-to-average power ratio (PAPR).
The impact of travelling surface acoustic waves on plasmonic devices is analyzed with a novel stroboscopic technique. Most strikingly, our electro-mechanical approach deliberately modulates the efficiency of a surface plasmon polariton launcher on sub-nanosecond timescales.
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