All-fiber multifunction continuous-wave coherent laser radar at 1.55 mu m for range, speed, vibration, and wind measurements
2000 (English)In: Applied Optics, ISSN 0003-6935, Vol. 39, no 21, 3716-3726 p.Article in journal (Refereed) Published
The design and performance of a simple, multifunction 1.55-mu m continuous-wave (cw) and frequency-modulated cw coherent laser radar system with an output power of 1 W is presented. The system is based on a semiconductor laser source plus an erbium-doped fiber amplifier, a polarization-independent fiber-optic circulator used as the transmit-receive switch, and digital signal processing. The system is shown to be able to perform wind-speed measurements even in clear atmospheric conditions when the visibility exceeds 40 km. The aerosol measurements indicate the potential to use single-particle detection for wind measurements with enhanced sensitivity. The system can perform range and line-of-sight velocity measurements of hard targets at ranges of the order of several kilometers with a range accuracy of a few meters and a velocity accuracy of 0.1 m/s by use of triangular-wave frequency modulation with compensation of the frequency-modulation response of the semiconductor laser. The system also demonstrates a capability for vibration sensing. (C) 2000 Optical Society of America.
Place, publisher, year, edition, pages
2000. Vol. 39, no 21, 3716-3726 p.
IdentifiersURN: urn:nbn:se:liu:diva-49662OAI: oai:DiVA.org:liu-49662DiVA: diva2:270558