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- W3094818611 abstract "On the basis of transverse second harmonic generation (TSHG) in a CdS nanowire-assembled Sagnac loop, we demonstrate an optical correlator for ultrashort pulse characterization with an overall footprint as small as ∼46 × 120 μm2. Pulses to be measured are coupled into the input port of a Sagnac-loop-based correlator and subsequently split into two counterpropagating pulses by the built-in optical coupler. They overlap automatically around the midpoint of the loop (making the correlator free of external bulky delay lines, insensitive to input coupling, and thus easy to operate with miniature size) and generate a spatially distributed TSHG signal perpendicular to the nanowire, which can be readily imaged and transferred into a time-domain temporal profile of the input pulses. The Sagnac-loop-based correlator shows an excellent accuracy in the measurement of 1040 nm femtosecond laser (5.6 pJ/pulse) with different pulse widths (from 554 to 1146 fs). The operation wavelength can cover a wide range providing a suitable nanowire diameter is selected. The ultracompact correlator with a simple operation and low cost may find applications ranging from on-chip optical communication and biophotonics to laser spectroscopy." @default.
- W3094818611 created "2020-11-09" @default.
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- W3094818611 date "2020-11-04" @default.
- W3094818611 modified "2023-10-11" @default.
- W3094818611 title "Miniature Optical Correlator in a Single-Nanowire Sagnac Loop" @default.
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- W3094818611 doi "https://doi.org/10.1021/acsphotonics.0c01417" @default.
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