According to executives interviewed exclusively by EE Times, startup chip manufacturers Celestial and OpenLight are set to produce their first chips this year, providing faster photonics and lower power consumption for large-scale customers running AI data centers, such as Amazon, Microsoft, and Google. In August, Celestial secured $255 million in funding from TSMC’s VentureTech Alliance … Read more
Multi-Aperture VCSELs of Varying Size and Shape Vertical cavity surface emitting lasers (VCSELs) present the basis for large data rate optical interconnects in data centers. Presently VCSELs have replaced edge-emitting lasers for distances below 500m due to their advantages such as on-wafer test possibility. The demand for VCSELs and in particular, arrays has most recently … Read more
Abbreviations Used in This Article (1) DFB：Distributed Feedback Laser(分布式反馈激光器)。It provides feedback through an integrated Bragg grating (a periodically modulated refractive index structure), achieving single longitudinal mode laser output with narrow linewidth and high wavelength stability, widely used in optical communication and sensing fields. (2) DBR：Distributed Bragg Reflector Laser(分布式布拉格反射器激光器)。Similar to DFB but with a different structure, … Read more
In today’s technological world, semiconductor lasers are ubiquitous yet often overlooked, from supermarket barcode scanners to fiber optic communication networks, from laser printers to medical devices. This compact and highly efficient light source has become an indispensable part of modern life. This article will guide you through the working principles, development history, and wide-ranging applications … Read more