Semiconductor laser controlled by an external cavity.

摘要

One end of a semiconductor laser (1) is coated with an antireflection film (1a). A resonator is constructed with a diffraction grating (2) and a mirror in external reflection (4). In addition, a beam separator (3) is provided between the diffraction grating (2) and the mirror in external reflection (4). An output light coming from the laser is transformed into a parallel light (13a) and is supplied to the beam separator (3). The parallel light (13a) modifies its path of light at the level of the beam separator (3), and is then supplied to the resonator. & br / the beam splitter (3) is a reflector of the side of the antireflection film (1a) and said resonator external transforms its characteristic of the characteristic resonance reflective by said beam separator (3).