Impact of interferometer optical path difference speed profile on the Fourier-transform-spectrometry-derived spectrum of a telecommunications signal

2006 ◽  
Vol 45 (19) ◽  
pp. 4686
Author(s):  
Katie M. Krause ◽  
Jerome Genest
Keyword(s):  
Fourier Transform ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Speed Profile ◽  
Fourier Transform Spectrometry ◽  
The Fourier Transform

Calculations on Optical Path Difference of a High Resolution Reflecting Scanning Fourier Transform Spectrometry

2011 ◽  
Vol 31 (7) ◽  
pp. 0730001 ◽  
Author(s):  
魏儒义 Wei Ruyi ◽  
张学敏 Zhang Xuemin ◽  
周锦松 Zhou Jinsong ◽  
周泗忠 Zhou Sizhong ◽  
高晓惠 Gao Xiaohui ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Fourier Transform Spectrometry

Design and Characterization of a Fourier Transform Micro-Spectrometer

2009 ◽  
Vol 74 ◽  
pp. 211-214 ◽  
Author(s):  
Shou Hua Wang ◽  
Hong Bin Yu ◽  
Fook Siong Chau ◽  
X.S. Tang
Keyword(s):  
Fourier Transform ◽  
Optical Resolution ◽  
Input Voltage ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Spectral Peaks ◽  
Grating Interferometer ◽  
Diode Pumped

In this paper, we present a Fourier Transform micro-spectrometer which works based on a lamellar grating interferometer. The spectrometer model is electrostatically driven by parallel plate actuators which change the optical path difference (OPD) between movable grating facets and fixed ones. With a 200V input voltage, a maximum OPD of 48.7μm is achieved. The spectrum of a combined light source of a diode-pumped solid-state (DPSS) laser (λ=532.0nm) and a laser diode (λ=637.2nm) is experimentally acquired to demonstrate the performance of the model. The reconstructed spectrum displays two separate spectral peaks at 530.5nm and 635.2nm and the corresponding full-width at half-maximum (FWHM) resolutions are 9.8nm and 12.8nm respectively, indicating good wavelength accuracy and optical resolution.

scholarly journals Simultaneous ground-based observations of O<sub>3</sub>, HCl, N<sub>2</sub>O, and CH<sub>4</sub> over Toronto, Canada by three Fourier transform spectrometers with different resolutions

2007 ◽  
Vol 7 (5) ◽  
pp. 1275-1292 ◽  
Author(s):  
D. Wunch ◽  
J. R. Taylor ◽  
D. Fu ◽  
P. Bernath ◽  
J. R. Drummond ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Lower Sensitivity ◽  
Critical Importance ◽  
The Difference ◽  
Total Column ◽  
Better Than

Abstract. An intercomparison of three Fourier transform spectrometers (FTSs) with significantly different resolutions is presented. The highest-resolution instrument has a maximum optical path difference of 250 cm, and the two lower-resolution instruments have maximum optical path differences of 50 cm and 25 cm. The results indicate that the two lower-resolution instruments can retrieve total column amounts of O3, HCl, N2O and CH4 using the SFIT2 retrieval code with percent differences from the high-resolution instrument generally better than 4%. Total column amounts of the stratospheric species (O3 and HCl) have larger differences than those of the tropospheric species (N2O and CH4). Instrument line shape (ILS) information is found to be of critical importance when retrieving total columns of stratospheric gases from the lower-resolution instruments. Including the ILS information in the retrievals significantly reduces the difference in total column amounts between the three instruments. The remaining errors for stratospheric species total column amounts can be attributed to the lower sensitivity of the lower-resolution FTSs to the stratosphere.

scholarly journals Simultaneous ground-based observations of O<sub>3</sub>, HCl, N<sub>2</sub>O, and CH<sub>4</sub> over Toronto, Canada by three Fourier transform spectrometers with different resolutions

2006 ◽  
Vol 6 (5) ◽  
pp. 10883-10928
Author(s):  
D. Wunch ◽  
J. R. Taylor ◽  
D. Fu ◽  
P. Bernath ◽  
J. R. Drummond ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Lower Sensitivity ◽  
Critical Importance ◽  
The Difference ◽  
Total Column ◽  
Better Than

Abstract. An intercomparison of three Fourier transform spectrometers (FTSs) with significantly different resolutions is presented. The highest-resolution instrument has a maximum optical path difference of 250 cm, and the two lower-resolution instruments have maximum optical path differences of 50 cm and 25 cm. The results indicate that the two lower-resolution instruments can retrieve total column amounts of O3, HCl, N2O and CH4 using the SFIT2 retrieval code with percent differences from the high-resolution instrument generally better than 3%, with respect to the high-resolution FTS. Total column amounts of the stratospheric species (O3 and HCl) have larger differences than those of the tropospheric species (N2O and CH4). Instrument line shape (ILS) information is found to be of critical importance when retrieving total columns of stratospheric gases from the lower-resolution instruments. Including the ILS information in the retrievals significantly reduces the difference in total column amounts between the three instruments. The remaining errors for stratospheric species total column amounts can be attributed to the lower sensitivity of the lower-resolution FTSs to the stratosphere.

Calculations on Optical Path Difference of a Reflecting Scanning Fourier Transform Spectrometry Based on Cube Reflector

2012 ◽  
Vol 226-228 ◽  
pp. 1951-1957
Author(s):  
Xin Jie Zhang ◽  
Xiao Xu Yang ◽  
Wen Fang Wang
Keyword(s):  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Compact Structure ◽  
Affective Factors ◽  
Fourier Transform Spectrometry ◽  
Calculation Results ◽  
Relationship Of ◽  
Geometrical Relationship ◽  
Interference Spectrometer

Compared with normal reflecting scanning transform Spectrometry, cube-based Spectrometr is a key component in the time-based modulation interference spectrometer, it have more compact structure ,using less accessory , easy to fix up , more steadily and more practicality . Calculations on optical path difference (OPD) of spectrometry play an important role in analyzing and improving of the structure. Following the law of Malus and the geometrical relationship of model, get the formula of OPD and the affective factors .The calculation results demonstrate that OPD is closely related to the tilted angel of rotating reflector , the size of cube reflector and the refractive index of reflector. And this kind of spectrometry has the character of high resolution, especial in some spectrum.

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