1. Electronic-Photonic Integrated Circuit for 3D Microimaging
- Author
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Behnam Behroozpour, Niels Quack, Phillip Sandborn, Ming C. Wu, Bernhard E. Boser, Tae Joon Seok, and Yasuhiro Matsui
- Subjects
Transimpedance amplifier ,electro-optical phase-locked loop (EO-PLL) ,frequency-modulated continuouswave (FMCW) lidar ,02 engineering and technology ,01 natural sciences ,law.invention ,010309 optics ,Optics ,coherent imaging ,3D imaging ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,electronic-photonic integrated circuit ,Electrical and Electronic Engineering ,Physics ,Silicon photonics ,3D microimaging ,business.industry ,020208 electrical & electronic engineering ,Photonic integrated circuit ,Chip ,Distributed Bragg reflector ,microranging ,Photodiode ,Phase-locked loop ,business ,heterogeneous integration ,Tunable laser ,silicon photonic - Abstract
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 $\mu \text{m}$ 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 $\times $ 3 mm silicon-photonic chip. The 0.18- $\mu \text{m}$ CMOS ASIC of the same area comprises the front-end 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
- 2017