Patent ID: 6741390
Filing Date: 2004-05-25
Classification: G02B,H01S,H04B

Abstract:
A variable wavelength light source apparatus for multiplexing a plurality of variable wavelength light to output multiplexed light, comprising:a wavelength selection device in which a propagation direction of emitted light is changed according to a wavelength of incident light; a plurality of light source sections, each including a gain medium that amplifies light and a reflection component that reflects the light incident on one end and emitted from the other end of said gain medium, to return the light to the other end, and emitting the light that has reciprocated in said gain medium and has been amplified, to a predetermined position of said wavelength selection device at angles different from each other; an optical resonance reflection section including a light incident surface on which the emitted light from said wavelength selection device enters, that reflects a part of the light incident vertically on said light incident surface to form an optical resonator configuration between said optical resonance reflection section and each of the reflection components of said light source sections, to generate oscillation light; an optical coupler section coupling the oscillation light transmitted through said optical resonance reflection section in an output light path; and a wavelength selection device drive section changing an arrangement angle of said wavelength selection device with respect to said optical resonance reflection section with said predetermined position as a center.