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Creators/Authors contains: "Zhou, Selina"

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  1. ; ; ; ; ; ; ; ; ; (, Optica Publishing Group)
    We experimentally observe signatures of 475-fs-long sech-squared-shaped solitons in a ps-pumped phase-mismatched parametric oscillator in the normal dispersion regime, purely due to cascaded quadratic nonlinearities. The results are in good agreement with our theoretical predictions. 
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  2. ; ; ; ; ; ; ; ; ; ; et al (, Science)
    Mode-locked lasers (MLLs) generate ultrashort pulses with peak powers substantially exceeding their average powers. However, integrated MLLs that drive ultrafast nanophotonic circuits have remained elusive because of their typically low peak powers, lack of controllability, and challenges when integrating with nanophotonic platforms. In this work, we demonstrate an electrically pumped actively MLL in nanophotonic lithium niobate based on its hybrid integration with a III-V semiconductor optical amplifier. Our MLL generates ∼ 4.8-ps optical pulses around 1065 nm at a repetition rate of ∼10 GHz, with energies exceeding 2.6 pJ and peak powers beyond 0.5 W. The repetition rate and the carrier-envelope offset frequency of the output can be controlled in a wide range by using the driving frequency and the pump current, providing a route for fully stabilized on-chip frequency combs. 
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  3. ; ; ; ; ; (, Optica Publishing Group)
    We demonstrate a synchronously pumped OPO in nanophotonic lithium nio-bate with a 4-ns-roundtrip cavity generating two octaves of continuous and coherent spec-trum from the visible to mid-IR with only 126 fJ of pump energy. 
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  4. ; ; ; ; (, Optical Sensors 2022)
    We introduce a method for gas sensing without performing direct spectrum measurement using broadband mid-infrared optical parametric oscillators, and experimentally demonstrate proof-of-concept carbon dioxide sensing. 
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  5. ; ; ; (, CLEO: QELS_Fundamental Science 2022)
    We utilize the unique formation dynamics of quadratic cavity solitons for enhanced sensing, experimentally show CO2sensing with high sensitivity and large dynamic range, and present the promising potentials of soliton-enhanced gas sensors. 
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  6. ; ; ; ; ; ; ; ; (, Optica Publishing Group)
    We report an electrically pumped hybrid lithium niobate/III-V actively mode-locked laser. The laser emits 4.8 ps pulses at 10.17 GHz around 1065 nm with high peak power of∼1 W. 
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