Optical phase detector using electrical pulse, and sensing system including the same
AssigneeKorea Advanced Institute of Science and Technology
InventorsJungwon KIM, Yongjin NA
Life of this patent
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Abstract
A sensing system is provided. The sensing system includes an electrical pulse generator that receives first optical pulses output from a pulsed laser, through a first path, and photo-electrically converts the first optical pulses to generate an electrical pulses; and an optical phase detector that receives second optical pulses output from the pulsed laser, through a second path, and outputs an electrical signal that corresponds to a phase error between the electrical pulses and the second optical pulses based on electro-optic sampling.
Claims13
A sensing system comprising:
- an electrical pulse generator that receives first optical pulses output from a pulsed laser, through a first path, and photo-electrically converts the first optical pulses to generate electrical pulses;
- and
- an optical phase detector that receives second optical pulses output from the pulsed laser, through a second path, and outputs an electrical signal that corresponds to a phase error between the electrical pulses and the second optical pulses based on electro-optic sampling.
A sensing system comprising:
- a sinusoidal waveform generator that receives first optical pulses output from a pulsed laser, through a first path and photo-electrically converting the first optical pulses to generate electrical pulses, and outputs a microwave signal of a specific frequency extracted from the electrical pulses;
- and
- an optical phase detector that receives second optical pulses output from the pulsed laser, through a second path, and outputs an electrical signal that corresponds to a phase error between the microwave and the second optical pulses based on electro-optic sampling.
A sensing system comprising:
- a pulsed laser that outputs optical pulses;
- a reference signal generator that receives first optical pulses divided from the optical pulses, through a first path, photo-electrically converts the first optical pulses to generate electrical pulses, and outputs a reference signal which is the electrical pulses or a microwave signal of a specific frequency extracted from the electrical pulses;
- and
- an optical phase detector that receives second optical pulses divided from the optical pulses, through a second path, and outputs an electrical signal that corresponds to a phase error between the reference signal and the second optical pulses based on electro-optic sampling,
- wherein the electrical signal is converted into a measured physical quantity of a sensor that causes a change in time-of-flight of the second optical pulses in the second path.
Dependencies are inferred from the claim text.