Multi-wavelength laser beam generation method and device
A production method and technology of a production device, which are applied to lasers, laser parts, optics, etc., can solve problems such as difficulty in realizing high-power multi-wavelength co-beam, etc., and achieve easy implementation, low cost, and high adjustment fineness and frequency accuracy. Effect
Active Publication Date: 2020-09-29
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
View PDF19 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the problem that it is difficult to realize high-power multi-wavelength co-beam in femtosecond laser three-wavelength ranging, the purpose of the present invention is to provide a multi-wavelength laser beam generation method and device, which uses a single-wavelength continuous laser to adjust the frequency of a sine wave. The wavelength of the incident laser is changed by controlling the acousto-optic modulator. The multi-level diffraction of the acousto-optic modulator is used to obtain laser beams of different wavelengths, and then the lens is used to convert them into parallel light. After reflection, the beams are combined to obtain multiple wavelengths. Component multi-wavelength laser beams, complete the generation of multi-wavelength laser beams with single-wavelength laser beams, and facilitate the realization of remote ranging applications
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0020] When it is necessary to generate a multi-wavelength laser beam combining 2 to 5 wavelengths for laser distance measurement, a method for generating a multi-wavelength laser beam disclosed in this embodiment is based on a single-wavelength continuous laser, and uses a sine wave to control the sound in a frequency-adjusted manner. The light modulator realizes the wavelength change of the incident laser light, and uses the multi-level diffraction method of the acousto-optic modulator to excite -2 level, -1 level, 0 level, +1 level, +2 level, a total of five diffracted light wavelengths, using the diaphragm The device shields and sorts them, respectively generates dual-wavelength, three-wavelength, four-wavelength, and five-wavelength laser beams with co-beam characteristics, and uses the correspondingly generated dual-wavelength, three-wavelength, four-wavelength, and five-wavelength laser beams. second laser ranging.
[0021] Such as figure 1 As shown, this embodiment al...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a multi-wavelength laser beam generation method and device, and belongs to the technical field of photoelectric measurement. The device is mainly composed of a laser, a polarizing beam splitter, a lambda / 2 wave plate, an acoustic optical modulator, a diaphragm, a lens, a plane mirror and a sinusoidal signal source. The method is only based on single-wavelength continuous laser, a sine wave is used for controlling the acoustic optical modulator in a frequency adjusting mode to realize wavelength change of the incident laser, laser beams with different wavelengths are obtained by using the acoustic optical modulator in a multi-stage diffraction mode, then the laser beams are converted into parallel light by using a lens, and the parallel light is reflected and combined to obtain a multi-wavelength laser beam containing a plurality of wavelength components, so the multi-wavelength laser beam is generated by using a single-wavelength laser beam. The device is simpleand reliable in structure, low in cost and easy to implement; remote distance measurement application is convenient to realize, and the method is further suitable for other engineering application occasions with multiple wavelength requirements for one laser.
Description
technical field [0001] The invention relates to a multi-wavelength laser beam generation method and device, belonging to the technical field of photoelectric measurement. Background technique [0002] Laser measurement includes interferometry and non-interference measurement, etc. It is often used for length measurement, distance measurement, shape measurement, angle measurement, etc. It is also used for vibration measurement, speed measurement, and motion measurement. Among them, the multi-wavelength measurement method is used in many occasions. Among the multi-wavelength measurement methods, there are methods including two-wavelength, three-wavelength, and the like. Among them, when realizing the dual-wavelength measurement method, in addition to using dual lasers, non-linear frequency doubling technology and birefringent crystal technology are commonly used. However, in the application of femtosecond laser multi-wavelength ranging, two or three lasers with different wav...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/106G02F1/11
CPCG02F1/11H01S3/1068
Inventor 梁志国武腾飞
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA