CE Certified VCSELs are semiconductor lasers emitting light perpendicular to the chip surface, suitable for high-speed optical modules like OSFP, offering high efficiency, scalability, and reliability.

Overview of VCSEL Technology

Vertical Cavity Surface Emitting Lasers (VCSELs) are semiconductor laser diodes that emit light perpendicular to the wafer surface, unlike conventional edge-emitting lasers which emit along the plane of the chip . The laser cavity is formed by distributed Bragg reflectors (DBRs) surrounding an active gain region, often containing multiple quantum wells . VCSELs can be fabricated into dense 2D arrays, enabling higher output power and addressable beam patterns, which is particularly useful for applications like LIDAR, 3D sensing, and optical interconnects .

Advantages for OSFP Modules

VCSELs are increasingly used in OSFP (Octal Small Form-factor Pluggable) transceivers for high-speed data communication due to several advantages:

• High efficiency: Typical VCSELs achieve up to 45% efficiency at room temperature, with low wavelength shift (<0.1 nm/°C), ensuring stable performance in data centers .
• Power scalability: Multi-stack epitaxial designs allow higher output power per chip, supporting the high-speed optical links required in OSFP modules .
• Array addressability: VCSEL arrays can be individually addressed, enabling precise beam control for parallel optical channels in multi-lane transceivers .
• On-wafer testing: VCSELs can be tested before dicing, reducing manufacturing defects and improving yield, which is critical for high-volume OSFP production .

CE Certification Considerations

CE marking indicates compliance with European Union safety, health, and electromagnetic compatibility standards. For VCSELs in OSFP modules:

• The laser product must meet IEC 60825-1 for laser safety, ensuring safe emission levels.
• Electrical and thermal performance must comply with low-voltage and EMC directives applicable to optical transceivers.
• Manufacturers often provide CE certification documentation for VCSEL components integrated into OSFP modules, ensuring regulatory compliance for deployment in EU markets.

Applications in OSFP

VCSELs in OSFP modules are primarily used for:

• High-speed optical interconnects: Short-reach multimode fiber links at 400G and beyond.
• Data center communications: Supporting parallel optical lanes with low power consumption and high reliability.
• Sensing and monitoring: Some OSFP modules integrate VCSEL arrays for in-cabin or environmental sensing in industrial settings .

Suppliers and Selection

Leading suppliers of VCSELs suitable for OSFP modules include ams OSRAM, Frankfurt Laser Company, and RPMC Lasers, offering CE-compliant devices with high reliability and performance for data communication applications . When selecting VCSELs, consider wavelength, output power, array configuration, thermal tolerance, and CE compliance documentation. In summary, CE Certified VCSELs provide a reliable, efficient, and scalable light source for OSFP optical modules, meeting both performance and regulatory requirements for high-speed data communication and sensing applications.