Device and method for measuring pulsed laser beam waist radius
A beam waist radius and measuring method technology, which is applied in the field of pulse laser beam waist radius measuring devices, can solve the problems of difficult accurate application, cumbersome measurement process, slow measurement speed, etc., and achieves the effects of stable and effective work and simple measurement process.
Active Publication Date: 2021-10-15
遵义医科大学珠海校区
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Problems solved by technology
This measurement process involves multiple spatial points, the measurement process is cumbersome, the measurement speed is slow, and errors are easily introduced during the measurement process
In addition, the beam quality analysis device is expensive, and its spatial resolution for Gaussian beam waist radius measurement is limited by the pixel size of its built-in photosensitive device, and the measurement accuracy for different laser light sources is different
The above measurement method is more suitable for measuring gas laser parameters with better time stability, such as He-Ne laser, which is difficult to apply accurately or cannot be applied to the optical measurement of discontinuous pulsed lasers, and the lasers widely used in the biomedical field are mostly pulsed. type laser
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[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0027] In the description of the present invention, several means one or more, and multiple means more than two. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or...
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The invention discloses a method and device for measuring the waist radius of a pulsed laser beam. The device includes: a light deflection generating device, which is used to induce photobreakdown of the pulsed laser to be measured at the focal point to generate cavitation bubbles to cause light deflection, including a laser Adjusting device, calibration liquid sample pool and light deflection extraction device; signal acquisition device, used to collect the light deflection signal of the laser beam emitted by the gas continuous laser through the photodiode; calculation unit, used for preset beam waist radius value to the described The light deflection caused by the cavitation bubbles is simulated, compared with the characteristics of the light deflection signal, and the beam waist radius of the pulsed laser beam to be measured is obtained. The invention has at least the following beneficial effects: the measurement process is simple, no expensive equipment is needed, and the beam waist radius of the pulsed laser can be accurately measured by using computer simulation and comparison features, thereby ensuring the stable and effective operation of medical laser equipment.
Description
technical field [0001] The invention relates to the field of computer aided measurement, in particular to a measuring device and method for pulsed laser beam waist radius. Background technique [0002] Laser is known as the most advanced instrument for analytical cytology in modern medicine. Pulsed laser has been widely used in biomedical photonics fields such as laser tissue processing, photoacoustic imaging, cell and biological tissue micro-nano surgery, and ophthalmic refractive surgery. Applications. Among them, the laser beam waist radius is an important parameter to measure the pulse laser intensity and dose, and its measurement accuracy and reliability directly affect the application of laser technology in the field of biomedicine. [0003] The basic principle of existing measurement methods and devices is to measure the optical parameters (such as spot radius and light intensity distribution) of the spot cross section at different positions in the laser transmission...
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IPC IPC(8): G01B11/08G01J1/42
CPCG01B11/08G01J1/4257G01J2001/4238
Inventor 王思琪陈昆涛
Owner 遵义医科大学珠海校区