Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   IRANIAN JOURNAL OF ELECTRICAL AND ELECTRONIC ENGINEERING   JULY 2007 , Volume 3 , Number 3-4; Page(s) 53 To 63.
 
Paper: 

ERROR ANALYSIS, DESIGN AND MODELING OF AN IMPROVED HETERODYNE NANO-DISPLACEMENT INTERFEROMETER

 
 
Author(s):  OULIAEI S., MOHAMMADNEZHAD SH.
 
* 
 
Abstract: 

A new heterodyne nano-displacement with error reduction is presented. The main errors affecting the displacement accuracy of the nano-displacement measurement system including intermodulation distortion error, cross-talk error, cross-polarization error and phase detection error are calculated. In the designed system, a He-Ne laser having three-longitudinal-mode is considered as the stabilized source. The free spectral range of the 35cm laser cavity is about 435-MHz at 632.8-nm wavelength, which a secondary beat frequency equal to 300-kHz is produced by combining the reference and measurement beams. The resolution of the displacement measurement resulting from intermodulation distortion, cross-talk and cross-polarization errors is limited to 18-pm. Also, the phase detection uncertainty causes an error of only 5.9-pm in the displacement measurement.
Furthermore, frequency-path models of two- and three-longitudinal-mode laser interferometers are modeled as the ac interference, ac reference, dc interference and optical power terms. A comparison study between two- and three-longitudinal-mode laser interferometers confirms that the performance of the designed system is considerably improved.

 
Keyword(s): CROSS-POLARIZATION, FREQUENCY-PATH MODEL, HE-NE LASER, HETERODYNE INTERFEROMETRY, INTERMEDIATION DISTORTION, NANO-DISPLACEMENT
 
References: 
  • ندارد
 
  pdf-File tarjomyar Yearly Visit 63
 
Latest on Blog
Enter SID Blog