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Absolute length-measuring interferometers using heterodyne signal of optical frequency comb laser
| Content Provider | Semantic Scholar |
|---|---|
| Author | 肖南, 王. |
| Copyright Year | 2013 |
| Abstract | A super-heterodyne interference system is developed for absolute distance measurement up to several meters based on multiple-wavelength interferometric method. Three laser diodes an d an optical frequency comb are used as the light sources. The repetition frequency of the optical comb is 58.418 MHz with a frequency stability of 10 -11 , and the wavelengths of the laser diodes are 1542 nm, 1542 nm and 1573 nm. There is a frequency difference of 20 GHz between the two laser diodes with the wavelength of 1542 nm. Therefore, two synthetic wavelengths, λ s1=80.5 μm and λ s2=15 mm, are obtained by changing different laser sources using an optical switch, and the interferometer has different measurement ranges. A distance of about 3 m is measured and the stability of th e results are 0.32 μm for λ s1 and 17 μm for λs2. Since only two of the laser diodes are phased locked to the optical comb, the stability of the carrier envelope offset frequency will influence the measurement stability. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/pscjspe/2014S/0/2014S_103/_pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
