Swept source applying NPR mode locking and OCT imaging system
A swept-frequency light source and mode-locking technology, applied in the field of modern optical communication, can solve the problem of the frequency sweeping light source not being fast enough to sweep the frequency, and achieve the effect of solving the problem that the frequency sweeping speed is not fast enough.
Pending Publication Date: 2021-03-02
SHENZHEN TECH UNIV
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Problems solved by technology
[0004] The technical problem to be solved by the embodiments of the present invention is to provide a frequency-sweeping light source using NPR mode-locking, which aims to solve the problem that the frequency-sweeping speed of the frequency-sweeping light source in the related art is not fast enough
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[0022] 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.
[0023] Such as figure 1 As shown, it is a frequency-sweeping light source applying NPR mode-locking provided by the embodiment of the present invention, including an NPR mode-locking pulse output unit, an optical circulator 2, a dispersion medium 3, and a frequency-sweeping laser output terminal 7, and the NPR mode-locking pulse output The unit is used to output pulsed laser, the first end of the optical circulator 2 is connected to the NPR mode-locked pulse output unit, the second end of the optical circulator 2 is connected to the dispersion medium 3, and the third end of the optical circulator 2...
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The embodiment of the invention is applicable to the technical field of modern optical communication, and comprises an NPR mode-locked pulse output unit, an optical circulator, a dispersive medium anda swept-frequency laser output end; the NPR mode-locked pulse output unit is used for outputting pulse laser, the first end of the optical circulator is connected with the NPR mode-locked pulse output unit, the second end of the optical circulator is connected with the dispersive medium, the third end of the optical circulator is connected with the swept-frequency laser output end, and the pulselaser enters from the first end of the optical circulator and is transmitted to the dispersive medium through the second end of the optical circulator; the pulse laser is subjected to dispersion Fourier transform in the dispersion medium to form a long pulse, and the long pulse passes through the second end of the optical circulator and the third end of the optical circulator and is output from the swept-frequency laser output end. The invention aims to solve the problem that the swept-frequency speed of a swept-frequency light source in the prior art is not high enough.
Description
technical field [0001] The invention belongs to the technical field of modern optical communication, and in particular relates to a frequency-sweeping light source and an OCT imaging system applying NPR mode-locking. Background technique [0002] Optical coherence tomography (OCT) is a non-invasive, non-contact optical tomography technique with extremely high resolution. The frequency-sweeping OCT technology belongs to the third generation of OCT technology, and its sensitivity and signal-to-noise ratio are significantly better than the traditional OCT technology; and the depth information acquisition process of the frequency-sweeping OCT technology does not require axial mechanical scanning, so it can significantly improve the OCT system. Imaging speed, enhanced system stability. The frequency-sweeping OCT system scans the fast wavelength of the frequency-sweeping laser, and uses a point detector to detect the intensity of the interference signal of the wavelength, and fin...
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Login to View More IPC IPC(8): H01S3/00A61B3/14
CPCA61B3/14H01S3/0057
Inventor 吴旭张恩诚杨志伟欧阳德钦陈业旺刘敏秋李春波吕启涛阮双琛
Owner SHENZHEN TECH UNIV