Patent ID: 9702685
Date: 2017-07-11
CPC Classifications: G01B,G02B,H01S

Claim:
1. A broadband wavelength-swept light source system comprising: a plurality of gain mediums configured to output a corresponding plurality of lights having different center wavelengths from each other by using stimulated emission and amplification of light; a first light source configured to connect the plurality of gain mediums to each other in parallel and emit the plurality of lights output by the plurality of gain mediums; a wavelength-swept filter configured to sweep wavelengths of the plurality of lights output by the plurality of gain mediums and compensate for spectroscopic optical paths of the plurality of lights; a second light source configured to connect the first light source to the wavelength-swept filter in series and feed the wavelength-swept lights from the wavelength-swept filter back to the plurality of gain mediums; a combiner configured to combine the wavelength-swept lights fed back to the respective plurality of gain mediums and output a combined wavelength-swept light; and a controller configured to control an output magnitude and a wavelength region of the wavelength-swept lights fed back to the respective plurality of gain mediums by controlling at least one of a magnitude of currents respectively applied to the plurality of gain mediums and time points when the currents are respectively applied to the plurality of gain mediums, wherein the controller is configured to control the currents respectively applied to the plurality of gain mediums such that the wavelengths of the plurality of lights are swept in sequence through the plurality of gain mediums, the sequence being a sequence in which a first wavelength-swept light output from a first gain medium among the plurality of gain mediums is only output during a first time period and a second wavelength-swept light output from a second gain medium among the plurality of gain mediums is only output during a second time period adjacent to the first time period.