High accuracy ranging with Yb3+-doped fiber-ring frequency-shifted feedback laser with phase-modulated seed
| Autor: | V.M. Khodakovskyy, Leonid P. Yatsenko, Klaas Bergmann, B. W. Shore, G. Bonnet, V.V. Ogurtsov |
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| Rok vydání: | 2006 |
| Předmět: |
Physics
business.industry Phase (waves) Michelson interferometer Ranging Filter (signal processing) Laser Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Amplitude Optics Modulation law Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
| Zdroj: | Optics Communications. 266:266-273 |
| ISSN: | 0030-4018 |
| Popis: | This paper demonstrates that a frequency-shifted feedback laser, when seeded by a phase-modulated narrow-band radiation field, is a powerful tool for distance measurements to accuracy better than 10 μm and resolution better than 100 μm, for distances of a few meters. In such measurements the unknown distance forms one arm of a Michelson interferometer, in which the intensity of the output signal is modulated at the phase-modulation frequency of the seed. The amplitude of the output-signal modulation exhibits a resonance for every distinct signal delay, i.e. for each distinct distance within the laser spot on the target. The use of a phase-modulated input seed allows one to use a very narrow-bandwidth filter when measuring the return signal. The results reported in this paper are in excellent agreement with previous theoretical predictions [L. Yatsenko et al., Opt. Commun. 242 (2004) 581] for the resolution limit and high signal-to-noise ratio for this new technique. |
| Databáze: | OpenAIRE |
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