Optical phase locked loops for generating highly-linear frequency chirps
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United States of America Patent
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Jul 9, 2024
Grant Date -
Oct 21, 2021
app pub date -
Apr 16, 2021
filing date -
Apr 17, 2020
priority date (Note) -
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Abstract
Various disclosed embodiments provide illustrative interferometers, optical phase locked loops, laser systems, interferometry methods, and phase locked loop methods. In illustrative embodiments, light from a laser is split into a first arm and a second arm. Light in an arm chosen from the first arm and the second arm is time delayed. The light in the first arm is split into third, fourth, and fifth arms. The light in the second arm is split into sixth, seventh, and eighth arms. Light in the seventh and eighth arms is phase shifted relative to light in the sixth arm. Light in the third, fourth, and fifth arms is combined with light in the sixth arm and phase shifted light in the seventh and eighth arms, respectively. A frequency correction signal for the laser is generated.
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