Method and apparatus for optical asynchronouos sampling signal measurements
AssigneeBeihang University
InventorsZheng Zheng, Xin Zhao, Lei Liu, Jiansheng Liu
Life of this patent
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Abstract
A method and a system for measuring an optical asynchronous sample signal. The system for measuring an optical asynchronous sampling signal comprises a pulsed optical source capable of emitting two optical pulse sequences with different repetition frequencies, a signal optical path, a reference optical path, and a detection device. Since the optical asynchronous sampling signal can be measured by merely using one pulsed optical source, the complexity and cost of the system are reduced. A multi-frequency optical comb system using the pulsed optical source and a method for implementing the multi-frequency optical comb are further disclosed.
Claims15
A multifrequency optical comb source comprising:
- a pulsed laser source with a laser cavity generating two or more optical pulse sequences in two or more spectra, where each of the two or more optical pulse sequences have different central wavelengths, where the maximum value of the full widths at half maximum of the two or more optical pulse sequences is less than the difference of the center wavelengths, where the repetition frequencies of the two or more optical pulse sequences with different center wavelengths are different;
- and
- a nonlinear optical apparatus, where one or more of the two or more optical pulse sequences pass through the nonlinear optical apparatus and one or more of the two or more spectra are broadened such that the two or more spectra of the two or more optical pulse sequences overlap.
A multifrequency optical comb source comprising:
- a pulsed laser source with a laser cavity, which generates two or more optical pulse sequences, where a first optical pulse sequence has a first central wavelength (λ1), and a first repetition frequency (f1) and a second optical pulse sequence has a second central wavelength (λ2), and a second repetition frequency (f2), where λ1 is different from λ2, and where a difference in the center wavelengths (Δλ) between λ1 and λ2 is equal to the absolute value of λ1 less λ2, where the maximum value of the full width at half maximum of the first optical pulse sequence and the second optical pulse sequence is less than Δλ, where f1 is different from f2;
- and
- a nonlinear optical apparatus, where one or more of the two or more optical pulse sequences are passed through the nonlinear optical apparatus to generate two or more spectra of one or more of the two or more optical pulse sequences broaden, so that the two or more spectra of the two or more optical pulse sequences overlap after broadening.
A method of generating a multifrequency optical comb comprising the steps of:
- (a) generating a plurality of optical pulse sequences in a plurality of spectra, where a first optical pulse sequence has a different center wavelengths and different repetition rate than a second optical pulse sequence, where the maximum value of the full widths at half maximum of the first optical pulse sequence and the second optical pulse sequence is less than the difference of the two center wavelengths from a pulsed light source;
- and
- (b) treating the one or both the first optical pulse sequence and the second optical pulse sequence with a nonlinear optical process to broaden the one or more of the plurality of spectra such that they overlap.
Dependencies are inferred from the claim text.