SEMICONDUCTOR OR SOLID-STATE LASER HAVING AN EXTERNAL FIBER CAVITY

摘要

A semiconductor laser having an external cavity including a single-mode optical fiber (40). A Bragg grating (42) is written onto the fiber (40) whic h defines the end of the optical cavity, selects the lasing wavelength, and discriminates against the lasing of higher-order transverse modes in the mul ti- mode gain region. The system includes an optically active medium (28) with a mirror (22) attached to a first end, and optics (26) for coupling the multi- mode output from the second end of the active medium into the single-mode fiber (40). The active medium may be optically pumped (32) and may comprise a solid state laser rod or a semiconductor diode.