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VCSEL Core Technologies and Innovations

Here at Raysees,we not only believe that designing VCSEL merely means replicating existing technologies, but also converting VCSEL technolocies into manufacturabl products, breaking through certain bottle necks, such as performance limitation, mass production stability, high reliability and application expansion.

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    Epitaxial Design

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    Device Design

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    Electromagnetic Simulation

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    Thermal Management

Our technologies aim to resolve the following issues

  • Use the VCSEL performance capabilities and provide solutions to various optical sensing applications.
  • As mass production brings on more challenges to VCSEL design and packaging processes, how do we maintain constant stability and reliability of the products?
  • How to simplify optical integration with VCSEL to ensure optimized performance and reliability of optical sensing systems?

Our Technical Highlights of VCSEL

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    Industry Leading PCE

    PCE>40%@50°C for our entire VCSEL product portfolio

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    Multi-Junction and Addressable VCSEL

    PCE>50%, Peak Optical Power>100W

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    Random Emitter Array with Small Emitter Pitch

    Emitter Pitch as short as 20um

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    ns-Pulse with Fast Rising and Falling Time

    200ps-800ps rising and falling times enable high-performance of dToF

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    Small Divergence VCSEL

    Small full divergence (15°) to increase efficiency of optical systems

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    Emitter-level microlens

    Microlens directly etched on VCSEL substrate enable beam shaping

Core Technologies of Raysees VCSEL

With a strong emphasis on the industrial issues, Raysees has developed relevant technologies along with consistent patent portfolio strategy.

  • 01 High power density, high peak power VCSEL

  • 02 Small divergence VCSEL

  • 03 Back-emitting VCSEL with on-substrate microlens

Our technology increases the output optical power of a VCSEL chip several times the regular VCSEL without any necessity to enlarge the emitting area. Its high peak power and high PCE cater to applications requiring high optical power and longer working distance such as dToF LiDAR.


Our innovative device and processes design can narrow the full divergence of a VCSEL to less than 15° without sacrificing too much optical power. The small divergence VCSEL can effectively reduce cross-talk effect in the optical sensing devices with tiny volume and increased signal-to-noise ratio, hence enhance the accuracy of measuring distance.


Our back-emitting VCSEL features fast rising/falling times and more efficient thermal dissipation, which enables higher peak optical power driven by narrow current pulses. With microlens directly etched on VCSEL substrate, beam shaping and steering can be achieved on emitter-level, allowing easier integration with optical sensing applications needing smaller foot prints such as smartphones or AR/VR equipment.


Mass Production of Raysees VCSEL

As a high-tech company, our goal is to convert VCSEL technologies into mass products. At present, we have proved our ability of mass production on thousands of 6-inch wafers using our in-house VCSEL epitaxy technology, with yield rate over 90%. Having passed aging testing under accelerated conditions, our VCSEL products shall be deployed into various industry-leading lighting products and different application scenarios, such as 3D vision, face recognition, security surveillance, driving assistance, and many more.

As a fabless company, Raysees maintains friendly collaboration with top fabs worldwide. Our fabmanagement team comprise members with more than 15 years of experience in mass production and OEM management.

Contact us for more information