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We experimentally demonstrate the RF photonics filter using optical tapped delay line based on an optical frequency comb and a PPLN waveguide as the multiplexer. RF filters with variable bandwidth, shape and center-frequency are implemented.
We present a 20 Gb/s monolithically integrated transmitter with stacked CMOS driver and periodic-loaded PN-junction Mach-Zehnder modulator fabricated in IBM's sub-100nm technology node. Transmitter extinction ratios of 10 dB at 20 Gb/s are demonstrated.
We report photonic radio-frequency arbitrary waveform generation in the W-band, enabled through optical pulse shaping and a near-ballistic uni-traveling-carrier photodiode. Example waveforms spanning 75–110GHz with long time apertures are generated and measured after wireless propagation.
We report a technique to simultaneously optimize the peak rejection and the resolution of a radiofrequency photonic notch filter based on a silicon nitride ring resonator.
A 1.8 W RF output power at 10 GHz and 60 % power conversion efficiency (PCE) at 6 GHz have been achieved using a modified uni-traveling-carrier photodiode flip-chip bonded on diamond.
A spatial-spectral holographic channelizer and cueing receiver capable of operating 1–110 GHz with sub-MHz resolution, high dynamic range, and 1000 variably programmable channels is presented, along with initial test results in the 10–20 GHz band.
This paper discusses on-chip optical isolators with bismuth-iron-garnet (BIG) overcladding on a ring resonator for photonic integrated circuit applications. Characterization of BIG prepared by RF magnetron sputtering and pulsed laser deposition methods are also discussed.
Modulation characteristics enhancement by mutual injection locking of monolithically integrated lasers is demonstrated. Resonance frequency as high as 34.3 GHz is recorded. The nonlinearity and chirp performances are simultaneously improved compared with free running state.
Interference, one of the major physical phenomena, relies on coherent superposition of waves, undertaking different phase lag. Considering vectorial near-fields structure, the fundamental concept was reconsidered, reformulated, and demonstrated at optical and radio frequencies.
We demonstrate high resolution W-band ranging based on photonic radio-frequency arbitrary waveform generation. Arbitrarily long unambiguous detection of multiple simultaneous targets is successfully executed using a photonic-assisted time-aperture expansion technique.
In this paper, a four-channel photonic-assisted compressive sampling system with large bandwidth is demonstrated, where sparse spectrum in the 2–19 GHz range with 50-kHz resolution is recovered from samples of compressed spectrums with 360-MHz bandwidth.
Using chirp processing of ultrafast laser pulses to perform pseudorandom measurements for compressed sensing, we successfully reconstruct multi-tone sparse-frequency microwave signals with an effective sampling rate well beyond the electronic limit.
We experimentally demonstrate a continuously-tunable quasi-THz RF-photonic phase shifter based on a dual-phase-shifted waveguide Bragg grating on silicon. Phase shifts up to ∼90°are demonstrated over the 16–20 GHz band, constrained only by instrumentation limitations.
A 1 Gbps 105.4 GHz wireless link is demonstrated by directly modulating a photonic integrated dual-laser source. A 50 m link is predicted to be able to achieve error free operation using FEC following optimisation.
We report antenna-coupled electro-optic phase modulators operating at Ka-band based on in-plane polymeric waveguides using the nonlinear guest-host polymer SEO125. Design, simulation, fabrication, and experimental results are discussed.
We demonstrate a scheme for minimising the insertion loss of an RF photonic filter, by exploiting the phase response of stimulated Brillouin scattering. We achieve a filter with high suppression, tunable bandwidth and low loss.
Precise time recovery on arbitrary point of fiber-optic link with λ-dispersion-induced RF phase locking assistance is proposed. Experiments have demonstrated the time deviation of 8.34ps@1s averaging and 0.592ps@103s averaging within a 30-km fiber loop.
A novel wideband radio frequency phase stabilized downlink transmission and optical domain down-conversion scheme is proposed. The achieved stability of the intermediate frequency is ∼1.8×10−12τ−1/2 after transferring through 30km optical fiber.
Concept of equivalent temperature is proposed for precise temperature measurement of crystals and glasses in laser calorimetry and nonlinear optics experiments. Determination of equivalent temperature of laser irradiated crystal or glass is based on frequency shift measurement of temperature calibrated acoustic resonance, excited in the sample.
We demonstrate heralded absorption of a single laser photon by a single trapped atomic ion, thereby mapping the photonic polarization state onto the atomic spin state with 97.9(1)% average fidelity.
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