Device for measuring width of single picosecond laser pulse

A pulse width and measurement device technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as high loss, increased difficulty in optical path adjustment, complex devices, etc., to improve time resolution, increase sensitivity, and avoid excessive loss Effect

Inactive Publication Date: 2010-04-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Although this device can realize a single measurement of the laser pulse width in the wavelength range of picoseconds to hundreds of picoseconds, the loss of the beam when it is grazing incident through the grating is very high. In additio

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  • Device for measuring width of single picosecond laser pulse
  • Device for measuring width of single picosecond laser pulse
  • Device for measuring width of single picosecond laser pulse

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[0019] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited by this.

[0020] See first figure 2 , figure 2 It is a schematic structural diagram of a specific embodiment of a single picosecond laser pulse width measuring device of the present invention. It can be seen from the figure that the device for measuring the pulse width of a single picosecond laser of the present invention consists of a beam expander telescope 10, a beam splitter 3-2, a delay adjuster 11, a first reflector 2-4, and a second reflector. Mirror 2-5, reflection grating 1-2, KDP frequency doubling crystal 12, filter 13, CCD array 14 and oscilloscope (not shown in the figure), and their positional relationship is: the beam expander in the direction of the laser pulse input to be measured The telescope 10, the beam splitter 3-2, the laser pulse beam to be measured is divided into a transm...

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Abstract

The invention discloses a device for measuring the width of a single picosecond laser pulse. The device consists of a beam splitter, a delay adjustor, a first reflector, a second reflector, a reflection grating, a KDP frequency doubling crystal, a filter, a CCD array and an oscilloscope, which have the following position relationships that: the beam splitter is arranged in the input direction of the laser pulse to be measured; the laser pulse beam to be measured is split into a transmission beam and a reflection beam through the beam splitter; the transmission beam enters the KDP frequency doubling crystal through the delay adjustor and the first reflector; the reflection beam also enters the KDP frequency doubling crystal after passing through the second reflector and the reflection grating; and the two beams generate non-collinear related signals in the KDP frequency doubling crystal, and the related signals enter the CCD array through the filter and are finally displayed on the oscilloscope. The width of the measured pulse can be acquired through calculation. The device for measuring the width of the single picosecond laser pulse not only effectively improves the sensitivity of the measurement, but also enlarges the wavelength range of the measurable pulse.

Description

Technical field [0001] The invention relates to a high-power ultra-short laser pulse, which is a single ultra-short laser pulse width measuring device. It uses a beam splitter to divide a laser beam to be measured into a reflected beam and a transmitted beam, and a reflection grating introduces the pulse in a beam of light The wavefront is tilted (lateral time delay) and interacts with another beam of light non-collinearly in the frequency doubling crystal to generate a related signal, thereby achieving a single measurement of the picosecond laser pulse width. Background technique [0002] In recent years, with the emergence of new crystals and new lasers, many achievements have been made in the research of optical parametric oscillators (OPO) and optical parametric amplifiers (OPA), and with the development of chirped pulse amplification (CPA), high-energy The generation of ultrashort laser pulses has made a great breakthrough. Since the amplification of ultrashort pulse lasers...

Claims

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Application Information

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IPC IPC(8): G01J11/00G02F1/35
Inventor 张福领谢兴龙孙美智毕群玉林尊琪
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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