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Periodically modulated flat-top pulse device with precise control of output power/energy

A flat-top pulse and periodic modulation technology, applied in the field of lasers, can solve the problems of dust contamination of lasers, fragile devices, inability to accurately control output power/energy accuracy, etc., and achieve the effect of strong tunability and high precision

Inactive Publication Date: 2014-10-01
BEIJING GK LASER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the strong laser is on the shutter for a long time, causing dust to contaminate the laser and easily damage the device
In addition, the accuracy of the output power / energy cannot be precisely controlled

Method used

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  • Periodically modulated flat-top pulse device with precise control of output power/energy
  • Periodically modulated flat-top pulse device with precise control of output power/energy
  • Periodically modulated flat-top pulse device with precise control of output power/energy

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Embodiment Construction

[0024] 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. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] An embodiment of the present invention provides a device for realizing periodic modulation of flat-top pulses. Such as figure 1 As shown, the device sequentially includes an electro-optic switch 101 , a 1 / 2 wave plate 102 , a polarizing device 103 and a waste light collection device 104 along the optical path. Among them, the electro-optic switch 101 mainly completes the function of periodically modulating the flat-top pulse, and the output waveform of the periodically modulated flat-top pulse has a rising edge and a falling edge of less than 3 ns. The 1 / 2 wave plate 102 is used to convert horizontally po...

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Abstract

The invention provides a device for realizing period-modulated flat-topped pulses, which comprises a polarized light source, an electro-optical switch, a 1 / 2 wave plate and a polarizing device, wherein the polarized light source is suitable for providing polarized light to be modulated; the electro-optical switch comprises an electro-optical crystal and an electro-optical driving power supply, and the electro-optical crystal is suitable for rotating the phase of the input polarized light for pi when voltage is applied to the electro-optical crystal; the 1 / 2 wave plate is suitable for rotating the phase of the polarized light output by the electro-optical switch for pi; and the polarizing device is suitable for selectively outputting the received polarized light according to the polarization state of the polarized light. The device for realizing period-modulated flat-topped pulses is characterized in that the electro-optical driving power supply is used for periodically applying half-wave voltage to the electro-optical crystal, so that the polarization state of the polarized light output by the electro-optical crystal is periodically changed, and the 1 / 2 wave plate is suitably shifted out and shifted in an optical path through a driving device. The device realizes the optical regulation for output power / energy, a pump source current does not need to be changed, and therefore the heat focal length of the inner part of a laser device cannot be changed to influence the system stability. Meanwhile, the accuracy is higher, and the tunability is stronger.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a periodic modulation flat-top pulse device for realizing precise control of output power / energy. Background technique [0002] With the rapid development of laser technology, laser technology plays an increasingly important role in many fields from military to civilian, scientific research to teaching, industry to agricultural and sideline industries. [0003] The existing method for realizing periodic modulation flat-top pulse adopts the method of mechanical chopping, that is, the shutter is used to directly and periodically block light from passing through or not passing through. [0004] The rising and falling edges of the waveform of the periodically modulated flat-top pulse generated by the mechanical chopping method are slow, about 10 ms. Moreover, the strong laser beam hits the shutter for a long time, causing dust to contaminate the laser and easily damage the device. In addition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/10H01S3/11
Inventor 樊仲维麻云凤闫莹牛岗
Owner BEIJING GK LASER TECH
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