LIGHT PULSE GENERATOR IN A CROSS-POLARIZATION CONFIGURATION
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United States of America Patent
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Issued Date -
Sep 19, 2024
app pub date -
Mar 15, 2024
filing date -
Mar 17, 2023
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Abstract
A light pulse generator for generating ultrashort light pulses is provided. The light pulse generator is based on a linear cavity free of polarizing components and configured to generate ultrashort light pulses based on spectral broadening of light. Segments of polarization maintaining fibers define an optical fiber path bound by first and second FBGs. A cross-polarization configuration in the cavity allows to couple a slow polarization axis of the optical fiber segment hosting the first FBG optical fiber segment with a fast polarization axis of the optical fiber segment hosting the second FBG. The cross-polarization configuration takes advantage of the birefringence of FBGs in polarization maintaining optical fibers to ensure a systematic start-up in only one predetermined polarization axis, without the necessity to add a polarizer or other polarizing component in the cavity.
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