Tunable light source, optical transmission device using this, and control method of tunable light source

摘要

PROBLEM TO BE SOLVED: To provide a small tunable light source capable of outputting light of a large number of wavelengths with a simplified configuration. SOLUTION: A wavelength variable light source 10A that oscillates with a laser at a plurality of different wavelengths has a common wavelength filter 11 having a periodic transmission peak wavelength or a reflection peak wavelength and is commonly used for a plurality of channels, and the common wavelength filter. A wavelength variable filter 12 that is connected and has a one-input multi-output configuration having a plurality of output ports and has a plurality of transmission peak wavelengths corresponding to the plurality of channels at the plurality of output ports. A plurality of gain media 131 to 138 connected to the plurality of output ports of the wavelength variable filter, and laser oscillation at the plurality of different wavelengths between the common wavelength filter and the plurality of gain media. A plurality of laser resonators are formed. [Selection diagram] Fig. 2