Coherent Introduces VCSEL-Based Illumination Module Platform for Short- and Mid-Range Automotive and Industrial LiDAR

时间： 2024-01-19 来源：COHERENT News

技术问答

COHERENT Corp. (NYSE: COHR), a leader in semiconductor lasers for depth sensors, today announced the introduction of an illumination module platform for short- and mid-range light detection and ranging (LiDAR) in automotive safety and robotic vision in industrial applications.

The growing adoption of advanced driver assistance systems (ADAS) in vehicles and of depth sensing in industrial robots is accelerating the demand for compact and flexible LiDAR systems that perform efficiently and reliably, even in the most extreme environments. Using eight 940 nm vertical-cavity surface-emitting laser (VCSEL) modules, Coherent has demonstrated a solution with several selectively addressable horizontal slices of the field of illumination (FOI). In addition to offering a compact form factor and excellent power conversion efficiency, the module is a much lower-cost alternative than using large addressable VCSEL arrays. Coherent has a demonstrator available for its customers to explore multiple VCSEL module positioning configurations and scanning algorithms for various depth sensing modalities and types of scenery.

“A powerful aspect of the module platform is the ability to customize an optimized solution for use cases requiring up to 30 meters of depth sensing in bright daylight. Our illuminators exceed 30% total power conversion efficiency and have a compact footprint, only about a third of the size of a credit card,” said Dr. David Ahmari, Vice President & General Manager, Optoelectronic Devices & Modules Business. “To achieve this breakthrough in efficiency and size, we are leveraging our state-of-the-art five-junction VCSEL technology that enables each illuminator module to achieve up to 200 W of output power. Our demonstrator is available for customers to evaluate and better envision the expanded universe of applications enabled.”

Customers of Coherent will be able to adjust the duration of the driving pulses to achieve both short- and mid-range LiDAR sensing. The FOI slices are dynamically selectable depending on the number of VCSEL modules and the order in which they are scanned. A voltage supply of only 21 V is required, which is much lower, and therefore more efficient, than existing LiDAR technology.

Coherent offers a broad portfolio of active and passive products for LiDAR designs. The portfolio of active devices includes VCSELs, edge-emitters, laser bars, frequency-modulated continuous wave (FMCW) sources, and pulsed fiber-based sources. The portfolio of passive devices includes laser optics, polygons, galvo mirrors, lenses, ultra-narrowband filters, wide-incidence-angle mirrors, gratings, and thermoelectrics.

Coherent will showcase its broad range of products and innovations for sensing at Photonics West 2024 in San Francisco, Jan. 30 to Feb. 1, Booth #4805.

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