Electronic-Photonic Integrated Circuit for 3D Microimaging
An integrated electronic-photonic phase-locked loop (PLL) modulates the frequency of a tunable laser for use in frequency-modulated continuous-wave (FMCW) lidar 3D imaging. The proposed lidar can perform 180k range measurements per second. The rms depth precision is 8 μm at distances of ±5 cm from t...
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Veröffentlicht in: | IEEE journal of solid-state circuits 2017-01, Vol.52 (1), p.161-172 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | An integrated electronic-photonic phase-locked loop (PLL) modulates the frequency of a tunable laser for use in frequency-modulated continuous-wave (FMCW) lidar 3D imaging. The proposed lidar can perform 180k range measurements per second. The rms depth precision is 8 μm at distances of ±5 cm from the range baseline. The range window is 1.4 m, with a precision of 4.2 mm at the edges of the window. Optical circuitry, including input light couplers, waveguides, and photodiodes, is realized on a 3 mm × 3 mm silicon-photonic chip. The 0.18-μm CMOS ASIC of the same area comprises the frontend transimpedance amplifier, analog electro-optical PLL, and digital control circuitry consuming 1.7 mA from a 1.8 V supply and 14.1 mA from a 5-V supply. The latter includes 12.5-mA bias current for the distributed Bragg reflector section of the tunable laser. The two chips are integrated using through-silicon-vias implemented in the silicon-photonic chip. |
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ISSN: | 0018-9200 1558-173X |
DOI: | 10.1109/JSSC.2016.2621755 |