The Distributed Feedback Laser (DFB Laser) is a type of semiconductor laser known for its high single-mode performance. Its core feature is the introduction of a periodic refractive index modulation structure (i.e., a Bragg grating) within the laser, which enables optical feedback and wavelength selection, resulting in the output of a single wavelength laser. DFB … Read more
Traditional thermal sink materials (such as W/Cu, Mo/Cu, and SiC/Al) generally have thermal conductivities below 200 W/(m·K), making it difficult to meet the heat dissipation requirements of high-power devices (such as GaN and SiC). Carbon materials represented by diamond and graphene, with their ultra-high thermal conductivity (diamond reaches 2200 W/(m·K)) and low thermal expansion coefficient … 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
A semiconductor laser is a device that generates laser light through the principle of PN junction stimulated emission. Its excitation methods include electrical injection, optical pumping, and high-energy electron beam excitation. When designing the driving circuit for semiconductor lasers, it is essential to understand its working principle, but more importantly, to study its working characteristics. … Read more