VCSEL module technology

ROHM’s newly developed VCSEL technology achieves greater accuracy in spatial recognition and distance measuring systems by using Time Of Flight (TOF) systems.

VCSEL has become popular in recent years with the adoption of laser light sources for spatial recognition in tablets and facial recognition in smartphones. And with the emergence of Automated Guided Vehicles (AGVs) and industrial inspection systems utilizing gesture and shape recognition, the demand for VCSEL is expected to increase.

At the same time, for applications that require automation, shorter pulse drive and higher output for the light source are required to achieve higher accuracy sensing.

Conventionally, in VCSEL-equipped laser light sources, both the VCSEL device and MOSFET for driving the light source are individually mounted on the board. Consequently, the wiring length (parasitic inductance) between products has an unintentional effect on the light source output and drive time – making it difficult to achieve a light source that provides the high output and short pulses needed for high accuracy sensing.

The new VCSEL module technology developed by ROHM makes it possible to modularize the VCSEL and MOSFET elements into a single package. By minimizing the wiring length between elements, the performance of each element is maximized, resulting in a light source capable of short pulse drive (under 10ns) that reduces susceptibility to external noise from sunlight while enabling up to 30% higher output over conventional solutions.

Features

• Modularize the VCSEL and MOSFET elements into a single package
• Reduces susceptibility to external noise from sunlight 

Applications

• Non-touch security system
• Industrial inspection systems utilizing gesture and shape recognition

Diagram