Spectral characteristic tester based on synchronous pulse measurement technique

A technology of spectral characteristics and pulse synchronization, which is applied in the direction of color/spectral characteristic measurement, measuring device, spectrometry/spectrophotometry/monochromator, etc., which can solve the problem of measuring the spectral characteristics of light pulses and hinder the application of pulsed light sources, etc. problem, achieve the effect of alleviating the stability of the light source system and solving the problem of over-dependence

Active Publication Date: 2015-04-08
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existence of the above problems makes the measurement of the spectral characteristics of optical pulses a difficult problem, which greatly hinders the application of pulsed light sources in various fields.

Method used

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  • Spectral characteristic tester based on synchronous pulse measurement technique
  • Spectral characteristic tester based on synchronous pulse measurement technique
  • Spectral characteristic tester based on synchronous pulse measurement technique

Examples

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Effect test

Embodiment 1

[0032] The spectral characteristic tester based on the pulse synchronous measurement technology described in this embodiment has a structure such as figure 1 As shown: including a synchronous controller 1, a pulsed laser light source 2, a pulse width of about 125 nanoseconds, a repetition frequency of 1 Hz, a high-speed acquisition card 3 capable of collecting electrical signals with a pulse width of sub-nanoseconds or above, a computer system 4, The first photodetector 5 is an energy meter, the second photodetector 15 is an MCT photodetector; and the test optical path system; the synchronous controller model is VDG6000C, the high-speed acquisition card model is RS1022, and the energy meter is Coherent Labmax .

[0033] The pulse width and frequency of the synchronous signal output by the synchronous controller 1 and the delay between synchronous signals are adjustable, and the minimum delay precision is 1 nanosecond. Synchronous controller 1 has four outputs, at t 1 , t 3 ...

Embodiment 2

[0037] Using the spectral characteristic tester based on the pulse synchronization measurement technology described in embodiment 1 to measure the Er whose central wavelength is 2.94 μm, pulse width is 150ns, and repetition frequency 1Hz 2+ : Spectral characteristics of YAG laser output pulses.

[0038] The transmittance and reflectivity of the beam splitter 8 to the measurement wavelength are 1:9, the first photodetector 5 selects an energy meter, the focal length of the lens 9 is 10cm, the first reflector 6, the second reflector 11 and the second reflector The reflectivity of the three reflectors 13 is greater than 90% for the laser with a measuring wavelength of 2.94 μm. The grating is 120 g / mm and the blaze wavelength is 2.5 μm. The second photodetector 15 is an MCT photodetector with a response time of about 50 ns. , using the synchronization controller 1 to accurately control the timing of each synchronization signal, the delay between the second synchronization signal a...

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Abstract

The invention provides a spectral characteristic tester based on a synchronous pulse measurement technique. The spectral characteristic tester comprises a synchronous controller, a pulse light source, a high-speed acquisition card, a computer system, a first photoelectric detector, a second photoelectric detector and a test light path system; the synchronous controller is provided with four output ends, wherein one of two output ends is connected with the pulse light source, and the other of two output ends is connected with the computer; the other two output ends of the synchronous controller are respectively connected with two channels of the high-speed acquisition card, two paths of correspondingly output signals respectively serve as outer trigger signals of the two channels, and the other two output ends are used for controlling the high-speed acquisition card to collect the signals in the two corresponding channels; the two channels of the high-speed acquisition card are simultaneously connected with the first photoelectric detector and the second photoelectric detector respectively. The tester can accurately measure light pulse signals in a wide wavelength range and a wide pulse width range.

Description

technical field [0001] The invention belongs to the technical field of spectral characteristic measurement, and in particular relates to a spectral characteristic tester based on pulse synchronous measurement technology. Background technique [0002] Spectroscopic measurement technology is a diagnostic technology commonly used in the characterization and state of material properties. It is widely used in various fields such as optics, materials science, biochemistry, and medicine. With the development of laser technology, various pulsed laser technologies and pulsed laser applications have been very mature. However, the spectral measurement of pulsed lasers and pulsed light signals generated by pulsed laser excitation materials is still a problem that needs further research, including the optical pulse. Spectral component analysis, time characteristic curve analysis and polarization state analysis, etc. [0003] At present, the techniques commonly used to measure pulse spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01N21/25
CPCG01J3/2889G01J11/00G01J3/027G01J3/0224
Inventor 冯国英姚轲张弘周寿桓
Owner SICHUAN UNIV
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