LIDAR system utilizing SOI-based opto-electronic components

US7936448B2 · kind B2 · utility

Assignee

• LIGHTWIRE LLC · US

Inventors

• Vijay Albuquerque · Palo Alto, US
• David Plede · Allentown, US

Key dates

• Filing date: Jan 24, 2007
• Grant date: May 3, 2011
• Expiry date: Mar 4, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2224/16225
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A compact, integrated LIDAR system utilizes SOI-based opto-electronic components to provide for lower cost and higher reliability as compared to current LIDAR systems. Preferably, an SOI-based LIDAR transmitter and an SOI-based LIDAR receiver (both optical components and electrical components) are integrated within a single module. The various optical and electrical components are formed utilizing portions of the SOI layer and applying well-known CMOS fabrication processes (e.g., patterning, etching, doping), including the formation of additional layer(s) over the SOI layer to provide the required devices. A laser source itself is attached to the SOI arrangement and coupled through an integrated modulation device (such as a Mach-Zehnder interferometer, i.e., MZI) to provide the scanning laser output signal (the scan controlled by, for example, an electrical (encoder) input to the input to the MZI). The return, reflected optical signal is received by a photodetector integrated within the SOI arrangement, where it is thereafter converted into an electrical signal and subjected to various types of signal processing to perform the desired type(s) of signal characterization/signature an…