VCSEL Core Technologies and Innovations
Raysees VCSEL technology is not built on imitation, but on original innovation. We focus on solving the core bottlenecks of VCSELs in optical sensing — performance, mass production, and application integration — driving continuous breakthroughs from chip design to system deployment.
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Epitaxial Design
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Device Design
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Electromagnetic Simulation
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Thermal Management
Solving Key Challenges
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How can VCSELs break performance limits for advanced optical applications?
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How do we simplify optical system integration while maximizing VCSEL system performance?
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How can VCSELs deliver higher performance for complex optical applications?
Highlights
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Automotive 2D Addressable VCSEL
Pixel-level control
for robust LiDAR -
High-Density Random Array
<24 µm pitch
higher density -
Oxide-Confined Narrow-Divergence VCSEL
<15° divergence for
compact optics. -
Single-Mode Polarized VCSEL
Stable polarization
high-SNR sensing -
Flip-Chip VCSEL
Microlens integration
for beam shaping -
Multi-Junction VCSEL
High optical density
for compact devices -
Red VCSEL
Visible emission for
health sensing -
Automotive CW VCSEL
Validated CW reliability
for automotive systems
Core VCSEL Technologies
Solving industry bottlenecks through proprietary chip innovation
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01 2D Addressable VCSEL
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02 Ultra-Low-Divergence VCSEL
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03 Backside-Emitting Microlens VCSEL
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04 High Power Density & High Peak Power VCSEL
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05 High-Speed Datacom VCSEL
Raysees 2D Addressable VCSEL enables pixel-level electrical addressing at the chip level. Built on a highly uniform vertical-cavity resonant architecture, it supports selective pixel activation, dynamic pattern projection, and programmable timing control — delivering higher optical power density and greater system flexibility for intelligent LiDAR sensing.
Raysees Ultra-Low-Divergence VCSEL technology uses advanced chip architecture and process optimization to achieve <15° beam divergence while maintaining high optical output power. It reduces optical crosstalk between the transmit and return paths, enabling more compact proximity sensing modules, simplified optical design, and higher-precision distance measurement.
Raysees backside-emitting microlens-integrated VCSEL uses a flip-chip architecture for faster pulse rise/fall times and higher peak optical power. By integrating microlenses on the backside-emitting VCSEL, it improves beam control while reducing optical stack height — enabling compact sensing modules for space-constrained smartphones, VR, and AR systems.
Raysees high-power-density, high-peak-power VCSEL technology delivers several times higher optical output power without increasing chip size, while improving power conversion efficiency. It enables compact, long-range optical sensing systems for applications such as 3D dToF and LiDAR.
High-speed VCSELs serve as core light sources for short-reach interconnects in data centers and AI clusters, primarily in parallel optical links. Optimized for array uniformity, modulation performance, and long-term reliability, they enable scalable bandwidth, controlled power consumption, and stable operation for next-generation optical modules.

Scalable VCSEL Manufacturing
Raysees delivers high-quality VCSEL chips at scale, with optimized process control, proven reliability, and stable wafer-level yield above 90%. With over 200 million chips shipped, Raysees has built a mature volume manufacturing platform supported by world-class epitaxy and wafer foundry partners.