High-energy sub-nanosecond optical pulse generation with a semiconductor laser diode for pulsed TOF laser ranging utilizing the single photon detection approach |
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| Authors: | Jaakko Huikari Eugene Avrutin Boris Ryvkin Juha Kostamovaara |
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| Institution: | 1.Department of Electrical Engineering, Electronics Laboratory,University of Oulu,Oulu,Finland;2.Department of Electronics,University of York,York,UK;3.A.F. Ioffe Physico-Technical Institute,St. Petersburg,Russia |
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| Abstract: | Bulk and quantum well laser diodes with a large equivalent spot size of d a /Γ a ≈ 3 µm and stripe width/cavity length of 30 µm/3 mm were realized and tested. They achieved a pulse energy and pulse length of the order of ~1 nJ and ~100 ps, respectively, with a peak pulse current of 6–8 A and a current pulse width of 1 ns. The 2D characteristics of the optical output power versus wavelength and time were also analyzed with a monochromator/streak camera set-up. The far-field characteristics were studied with respect to the time-homogeneity and energy distribution. The feasibility of a laser diode with a large equivalent spot size in single photon detection based laser ranging was demonstrated to a non-cooperative target at a distance of a few tens of meters. |
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