Chinese Optics, Volume. 16, Issue 5, 1226(2023)
Development of a doppler asymmetric spatial heterodyne interferometer for ground-based wind field detection at the 557.7 nm wavelength
Fig. 2. Curves of the modulation and phase difference varying with optical path difference of the 557.7 nm spectral line at 90–110 km
Fig. 3. Curves of the modulation and phase difference varying with optical path difference of the 557.7 nm spectral line at 150–300 km
Fig. 4. Plot of the optical path difference versus the interferogram intensity difference
Fig. 6. (a) Relationship between signal to noise ratio and pixel position; (b) graph of variation of wind speed error with SNR
Fig. 8. (a) MTF of the exit optics and (b) dot chart of the exit optics
Fig. 9. (a) Two-dimensional system diagram; (b) three-dimensional system diagram
Fig. 12. (a) Schematic diagram of the laboratory debugging device; (b) photograph of the laboratory debugging device
Fig. 20. The corresponding interferogram is 1810, 2021 and 2203 r/min, respectively
Table 1. DASH system parameter list
View tableView in ArticleTable 1. DASH system parameter list
System Parameter Value Transmittance of an optical system: τtot(σ). 0.07 Detector quantum efficiency: η(σ) 0.9 Optical system: F # 3.862 Detector pixel size: d 13 μm Dark current ηdark (refrigeration temperature d∆d0/dT：−80 °C) 0.00025 Readout noise: σread 1e-/p·s-1
Table 2. Design indices of the dual telecentric optical system
View tableView in ArticleTable 2. Design indices of the dual telecentric optical system
Parameter System indicators Wavelength 557.7 nm Magnification −0.9715 F# 9 Distortion 2.4×10−5 Back focal length 30 mm Telecentricity <7.0×10−3
Table 3. Basic parameters of DASH interferometer
View tableView in ArticleTable 3. Basic parameters of DASH interferometer
Parameter System indicators Littrow wavelength 557.7 nm Half of view angle 2.815° Diameter of the pupil 40 mm Field of view extension prism Materials H-LAK2A Angulus parietalis 8.7424° Wedged spacers Materials Fused silica (spacers1); H-FK61 (spacers 2) Thickness Fused silica (spacers1); H-FK61 (spacers 2) Beam splitter Splitting ratio 1∶1 Asymmetrical 20.363 mm Materials H-K9LAGT Gratings Grating Littrow angle 9.631° Grating diffraction order 1 Grating effective width 13.69 mm Materials Fused silica Lines 600 gr/mm
Table 4. DASH system specifications
View tableView in ArticleTable 4. DASH system specifications
Parameter System indicators Resolving power 16402.941 measuring range 90-110 km (Height of airglow) Resolution of measurement 1.0933 cm−1 (0.034 nm) $\dfrac{ {{\rm{d}}\Delta { d_0} } }{ { {\rm{d} }T} }$ 2.224×10−7 mm/°C Etendue (AΩ) 0.09525 cm2sr SNR 113.75 Decomposition of precision Temperature 0.05 rad/°C SNR SNR>60，wind speed error <10−4 m/s Inversion accuracy (Nuttall window function, FWHM=10) 0.00064 m/s
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Huan LIU, Lun JIANG, Xiao-fei ZHANG, Yun FU, Yan-song SONG, Shou-feng TONG, Xian-zhu LIU. Development of a doppler asymmetric spatial heterodyne interferometer for ground-based wind field detection at the 557.7 nm wavelength[J]. Chinese Optics, 2023, 16(5): 1226
Category: Original Article
Received: Nov. 13, 2022
Accepted: --
Published Online: Oct. 27, 2023
The Author Email: Lun JIANG (jlciomp@163.com)
