High resolution laser LIDAR utilising two-section distributed feedback semiconductor laser as a coherent source

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High resolution laser LIDAR utilising two-section distributed feedback semiconductor laser as a coherent source

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© The Institution of Electrical Engineers
Published

An air-spaced coherent LIDAR (light detection and ranging) employing a two-section distributed feedback (DFB) injection laser is demonstrated. The relative distance of a mirror target was detected with 0.1 μm resolution. The absolute distance of a diffuse target was measured with 1 cm accuracy. These results indicate that semiconductor lasers developed for communication systems may be useful for sensing applications such as robotic vision, surface profiling and automated fabrication.

Inspec keywords: optical radar; semiconductor junction lasers; measurement by laser beam; distributed feedback lasers

Other keywords: semiconductor laser; coherent source; high-resolution optical radar; distributed feedback; two section DFB injection laser; ranging; light detection; laser LIDAR

Subjects: Laser applications; Optical radar; Semiconductor lasers

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