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A kind of laser wavelength screening method and device
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A technology of laser wavelength and screening method, which is applied in the field of laser detection, can solve the problems of large volume of precision spectrometers and cannot meet the accuracy range of DFB lasers, and achieves the effects of high measurement accuracy, fast detection speed and simple structure
Active Publication Date: 2018-02-09
BEIJING AEROSPACE YILIAN TECH DEV
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[0003] At present, the detection of the central wavelength of DFB lasers is mostly performed by large-scale spectrometers, while domestic spectrometers mainly rely on imported spectrometers from Europe, America and Japan. Accuracy range of DFB laser
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Embodiment 1
[0043] figure 1 A flow chart of the laser wavelength screening method provided by Embodiment 1 of the present invention is given. Exemplarily, this embodiment can detect the wavelength of a DFB laser with a specific wavelength, so as to solve the problem of finished product inspection after laser production. Such as figure 1 As shown, the method includes:
[0044] 101. The laser wavelength tuning module drives the laser to be tested to perform laser modulation wavelength scanning.
[0045] Wherein, the laser wavelength tuning module provides a stable current for the laser to be tested and continuously changes periodically with time. Exemplarily, the laser wavelength tuning module of this embodiment adopts a triangular wave current generator, which is added to the laser to be tested, so that the laser The output wavelength is continuously scanned around the center wavelength.
[0046] 102. Fill the gas chamber with standard gas, and use the standard gas to absorb the laser l...
Embodiment 2
[0070] figure 2 A schematic structural diagram of the laser wavelength screening device provided in Embodiment 2 of the present invention is given, as figure 2 As shown, the laser wavelength screening device includes:
[0071] The laser wavelength tuning module 10 is used to drive the laser to be tested 11 to perform laser modulation wavelength scanning;
[0072] The gas chamber 12 is used to fill the standard gas, and utilize the standard gas to absorb the laser light passing through the gas chamber;
[0073] A laser wavelength collection module 13, configured to receive and collect the light intensity of the laser output from the gas chamber; and
[0074] The laser wavelength screening module 14 is used to calculate the central wavelength of the laser to be measured 11 through a corresponding algorithm according to the collected laser light intensity;
[0075] Wherein, the laser wavelength tuning module 10 and the gas chamber 12 are connected to the laser to be measured...
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Abstract
The present invention provides a laser wavelength screening method and its device, wherein the method includes the following steps: a laser wavelength tuning module drives the laser to be tested to perform laser modulation wavelength scanning; The laser in the chamber; the laser wavelength acquisition module receives and collects the light intensity of the laser output from the gas chamber; the laser wavelength screening module calculates the central wavelength of the laser to be measured through a corresponding algorithm according to the collected laser light intensity. The invention measures the laser wavelength based on the laser absorption spectrum technology, has high measurement accuracy and fast detection speed, and simultaneously controls the temperature of the laser to be measured, thereby improving the stability of the device, and the device of the invention is simple in structure, small in size and low in cost.
Description
technical field [0001] The invention belongs to the field of laser detection, and relates to a laser wavelength screening method and a device thereof. Background technique [0002] With the development of laser processing technology, lasers are also constantly developing, and many new types of lasers have emerged. Among them, DFB (Distributed Feedback) lasers are widely used in optical fiber communication, tunable semiconductor laser absorption spectroscopy technology, atomic spectroscopy applications, and emerging markets due to their good monochromaticity, narrow line width, and high side-mode suppression ratio. and other fields. [0003] At present, the detection of the central wavelength of DFB lasers is mostly performed by large-scale spectrometers, while domestic spectrometers mainly rely on imported spectrometers from Europe, America and Japan. Accuracy range of DFB lasers. Contents of the invention [0004] In view of this, the present invention provides a laser...
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