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Novel Design Simplifies VECSEL Fabrication

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Intracavity microlens provides focusing and matches pump light to resonator mode.

Breck Hitz

There are several advantages in using the end facet of an optical fiber as the output mirror of a vertical external cavity surface-emitting laser (VECSEL). For one thing, it’s easy to couple the VECSEL’s output into the fiber. And if the VECSEL is optically pumped, the fiber provides an ideal mechanism to launch the pump power. Recently, Nicolas Laurand and his colleagues at the Institute of Photonics at the University of Strathclyde in Glasgow, UK, demonstrated such a laser that incorporates a unique intracavity microlens to stabilize the resonator (Figure 1). This type of laser is likely to...Read full article

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    Published: November 2007
    Glossary
    metrology
    Metrology is the science and practice of measurement. It encompasses the theoretical and practical aspects of measurement, including the development of measurement standards, techniques, and instruments, as well as the application of measurement principles in various fields. The primary objectives of metrology are to ensure accuracy, reliability, and consistency in measurements and to establish traceability to recognized standards. Metrology plays a crucial role in science, industry,...
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    vertical external cavity surface-emitting laser
    A laser that has a surface-emitting semiconductor gain element coupled to an external mirror designed to complete the laser resonator. VECSELs can be electrically or optically pumped. The extended cavity can emit high power from a relatively large emitting area.
    Communicationsfiber opticsmetrologyoptical fiberoutput mirrorphotonicsResearch & Technologyvertical external cavity surface-emitting laser

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