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 mu m 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 x 3 mm silicon-photonic chip. The 0.18-mu m 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.


Published in:
Ieee Journal Of Solid-State Circuits, 52, 1, 161-172
Year:
2017
Publisher:
Piscataway, Institute of Electrical and Electronics Engineers
ISSN:
0018-9200
Keywords:
Laboratories:




 Record created 2017-05-01, last modified 2018-01-28


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