Ultrahigh resolution spectrograph based on tunable Fabry-Perot filter and array detector spectrograph

A Perot filter, ultra-high resolution technology, applied in the field of ultra-high resolution spectrometer

Inactive Publication Date: 2013-06-19
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

In the near-infrared band with a wavelength of 800nm, the spectral range of 10GHz is only equivalent to the wavelength range of 0.02nm, so in a spectral band of tens of nm to be measured, there will be many spectral modes output by the Fabry-Perot filter , which makes the Fabry-Perot filter generally only applicable to laser mode measurements

Method used

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  • Ultrahigh resolution spectrograph based on tunable Fabry-Perot filter and array detector spectrograph
  • Ultrahigh resolution spectrograph based on tunable Fabry-Perot filter and array detector spectrograph

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Embodiment Construction

[0018] like figure 1 As shown, the ultra-high resolution spectrometer based on tunable Fabry-Perot filter and array detector spectrometer consists of a tunable Fabry-Perot filter 1 and an array detector spectrometer 2, The broadband spectral signal to be measured is incident on the tunable Fabry-Perot filter 1, and is frequency-selected by the Fabry-Perot filter to output a set of comb-shaped spectra that meet the resonance conditions of the Fabry-Perot filter Composition; the comb spectrum output by the Fabry-Perot filter continues to enter the back-end array detector spectrometer 2, and the array detector gives the accurate value of the comb spectrum in real time. By changing the scanning voltage applied to the Fabry-Perot filter, the comb spectrum output from the Fabry-Perot filter can be continuously scanned. When the scanned voltage corresponds to the voltage that moves a free spectral range, and the comb spectrum at that moment is recorded by the back-end array detecto...

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Abstract

The invention discloses an ultrahigh resolution spectrograph based on a tunable Fabry-Perot filter and an array detector spectrograph. The ultrahigh resolution spectrograph comprises the tunable Fabry-Perot filter and the array detector spectrograph, wherein a to-be-detected broadband spectrum signal enters the tunable Fabry-Perot filter and is converted into a comb-shaped spectrum to emit, and the array detector spectrograph at the back end conducts measurement. A scanning voltage of the tunable Fabry-Perot filter is adjusted successively, the array detector spectrograph is used to record the comb-shaped spectrum output by the tunable Fabry-Perot filter at present, entire spectrum information in a broad band spectrum range can be obtained at the same time, and the spectrograph is ultrahigh in spectral resolution. The novel ultrahigh resolution spectrograph has the advantages of being simple in structure, ultrahigh in spectral resolution, short in measuring time, and suitable for simultaneous measurement of intrinsic absorption spectrum of a plurality of gas components.

Description

technical field [0001] The invention relates to a spectrum measuring instrument, in particular to an ultra-high resolution spectrometer based on an adjustable Fabry-Perot filter and an array detector spectrometer. Background technique [0002] A spectrum represents the distribution of optical intensity as a function of optical wavelength (or optical frequency). As a measurement of basic physical properties, spectral measurement is widely used in various industries. The measurement of spectrum generally relies on various spectrometers, and there are many kinds of spectrometers with different working principles and performances. Human beings have developed various types of spectrometers for different application backgrounds. [0003] In the past two decades, with the development of array photodetectors, array detector spectrometers based on charge-coupled devices (CCD devices) or focal plane array devices have developed to a very high level, generally with real-time spectral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
Inventor 沈永行姜培培吴波杨丁中
Owner ZHEJIANG UNIV
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