TRUMPF presents new VCSEL laser platform

Created September 15, 2021
Technologies and Products

TRUMPF Photonic Components, a manufacturer of VCSEL (Vertical Cavity Surface Emitting Lasers) and photodiode solutions revealed the new product platform ViBO (VCSEL with integrated Backside Optics). The array technology supports a new generation of illumination devices that are inherently eye-safe over the whole product lifetime as the diffusor optics are monolithically incorporated into the laser array. This allows interfacing with the new platform and enhances reliability.

The company says the form factor is significantly reduced compared to present hybrid VCSEL package solutions and ViBO can be directly SMD mounted onto a board or driver IC without additional wire bonding. This supports for instance, easier integration under smartphone displays. With coplanar contact designs, the devices can be flip-chip mounted yielding the most compact integration with the shortest electrical path and thus minimum electrical inductance. This design setup allows short pulses, high modulation speed and the flexibility of addressing multiple channels or even selected segments on the chip.

In the first-generation products, TRUMPF is focusing on the realisation of illumination devices incorporating various diffuser designs for a wide range of emission angles to support various flood illumination applications for consumer and automotive. Ralph Gudde, VP of Marketing and Sales says, “After having shipped millions of hybrid packaged products containing separate VCSEL arrays and diffusors, these widely used flood illuminators are the logical candidates for our ViBO technology.” Addressable zones allow the creation of flood or spot illumination, as well as linear and induvial illumination profiles, as the emitting zones can be flexibly turned on and off.

ViBO adressable zones Image: TRUMPF Photonic Components

TRUMF says that with coplanar contact designs, the devices can be flip-chip mounted yielding the most compact integration with the shortest electrical path and thus minimum electrical inductance. This design setup allows short pulses, high modulation speed and the flexibility of addressing multiple channels or even selected segments on the chip.

“ViBO has superior properties as well as cost advantages compared to standard top-emitting devices that are combined with external optics. Using ViBO as light source for 3D sensing applications offers more flexibility and freedom in design for its integration, as the footprint and the height are significantly smaller than hybrid solutions. This is especially interesting for consumer electronics such as smartphones or AR glasses,” says Gudde. “The smart combination of our high-performance VCSELs with unique, patented lens forms directly etched into the GaAs-substrate, gives our customers unprecedented benefits in creating tailored illumination profiles needed in advanced 3D sensing applications.”

TRUMPF says ViBO lays the foundation of a new platform which can be tailored to various customer requirements and optical system designs. Possible applications could include proximity sensing – from smart glasses, face recognition and LiDAR applications.

For more information, visit www.trumpf.com

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This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.