期刊
OPTICS LETTERS
卷 34, 期 7, 页码 950-952出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.000950
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资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/C540042/1, EP/C540034/1]
- Engineering and Physical Sciences Research Council [EP/C540034/1, EP/C540042/1] Funding Source: researchfish
- EPSRC [EP/C540034/1, EP/C540042/1] Funding Source: UKRI
We present an optimized method for multiwavelength interferometry that allows measurements beyond the largest beat wavelength. The approach exploits wavelength coincidence between two beat wavelengths in order to measure unambiguously over an extended range. Performance of the approach has been validated both through simulations and experimentally by means of a fiber interferometer for four measurement wavelengths. Initial results have demonstrated 1/200th of a fringe phase resolution, giving absolute metrology over 18.16 mm, or a dynamic range of 1 part in 2.4 x 10(6). With improved phase resolution the method has the potential to range over > 100 m using femtosecond laser frequency comb sources. (C) 2009 Optical Society of America
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