Device Comprising a Laser

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention relates to an edge-emitting semiconductor laser diode equipped with a specially designed waveguide stripe. The edges of the waveguide stripe have triangular, saw-tooth-shaped corrugations. These corrugations selectively increase losses for unwanted higher-order lateral modes while allowing the fundamental lateral mode to be amplified. As a result, the laser emits a strong, single-mode beam with high brightness and low divergence, even if the waveguide stripe is wide enough for multimode operation.

Use CasesContent extracted from patent full text and abstract with AI.

• Industrial material processing (cutting, welding, engraving) needing powerful, focused laser beams
• Optical fiber amplifier and laser pumping, especially where high beam quality is required
• Medical applications such as surgery or optical imaging, where precise and bright beams are crucial
• Laser printing and imaging systems that require fine, uniform illumination
• LIDAR and remote sensing systems demanding narrow-divergence, high-brightness sources
• Free space communications, where beam coherence and focusability are essential

BenefitsContent extracted from patent full text and abstract with AI.

• Provides high output power combined with narrow beam divergence for high brightness
• Reduces or eliminates unwanted higher-order lateral modes, resulting in single-mode operation even with wide stripes
• Enables simpler, more cost-effective laser systems since complex external mode control optics are not required
• Applicable to a broad range of semiconductor material systems and laser structures (quantum well, quantum dot, quantum cascade)
• Can be fabricated with standard semiconductor processing techniques (photolithography and etching)
• Improves performance in applications requiring focused, high-quality beams, reducing losses and improving system efficiency

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

An embodiment of the invention relates to a device comprising a laser and a waveguide stripe or netlike hexagonal stripe structure, which allows propagation of multitude of the lateral modes in the waveguide stripe or stripe structure, wherein the waveguide stripe has at least one corrugated edge section along its longitudinal axis to provide preferable amplification of the fundamental lateral mode or in-phase supermode and to obtain high brightness of the emitted radiation.