A Narrow Pulse Type Sweeping Frequency Light Source
A technology of sweep frequency light source and narrow pulse, applied in the field of laser light source, to achieve the effect of reducing cost, flexible and adjustable frequency sweep rate, and high step accuracy
Active Publication Date: 2022-05-24
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
Through the analysis of the existing technology, it is still challenging to produce a narrow pulse type sweeping light source with wide bandwidth, high sweep rate, high step accuracy, and high linearity
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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0032] In order to solve the above technical problems, the present invention proposes a frequency-sweeping light source scheme based on a photoelectric hybrid dual-frequency comb to produce a narrow-pulse frequency-sweeping light source with wide bandwidth, high frequency sweep rate, high step accuracy, and high linearity, including: A first optical frequency comb with a large bandwidth, a large...
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Abstract
The invention discloses a narrow-pulse frequency-sweeping light source, which belongs to the field of laser light sources. It includes a first optical frequency comb with a large bandwidth, a large dispersion unit, a second optical frequency comb, a photodetector and an optical intensity modulator; the output end of the first optical frequency comb is connected to the input end of the large dispersion unit, and the large dispersion unit The output end is connected to the first input end of the optical intensity modulator; the output end of the second optical frequency comb is connected to the input end of the photodetector, and the output end of the photodetector is connected to the second input end of the optical intensity modulator; the second The repetition frequency of the second optical frequency comb has a repetition frequency difference from that of the first optical frequency comb; the photodetector converts the second optical frequency comb into a second electric frequency comb, and the second electric frequency comb has the same repetition period as the second optical frequency comb , and overlap and stagger periodically with the pulse of the first optical frequency comb in the time domain with a repetition frequency difference. Invented a narrow-pulse frequency-sweeping light source with wide bandwidth, high stepping precision, and high linearity, and its frequency-sweeping rate is flexible and adjustable.
Description
technical field [0001] The invention belongs to the field of laser light sources, and more specifically relates to a narrow-pulse frequency-sweeping light source. Background technique [0002] A frequency-sweeping light source refers to a laser light source whose light wave frequency changes (mainly linearly) with time. It essentially establishes an accurate mapping relationship between the time domain and frequency domain. By emitting different wavelengths at different times, the corresponding scanning frequency function. Because it maps the frequency domain information to the time domain, it can be combined with a high-speed single-point detector and a real-time processing system to complete the rapid measurement of the frequency domain information. Thanks to this high-speed advantage, the swept light source has brought about a huge improvement in application performance in optical tomography imaging (OCT), lidar imaging, microscopic imaging, high-speed spectral measureme...
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IPC IPC(8): H04B10/50H04B10/54
CPCH04B10/503H04B10/54
Inventor 张新亮陈燎张驰王若兰
Owner HUAZHONG UNIV OF SCI & TECH