MULTICHANNEL WAVELENGTH TUNABLE EXTERNAL CAVITY LASER

摘要

The present invention relates to a multichannel wavelength tunable external cavity laser, and more specifically, to a multichannel wavelength tunable external cavity laser in which a wavelength tunable external cavity laser is capable of simultaneously outputting various wavelengths, and moreover, capable of tuning the wavelengths. The multichannel wavelength tunable external cavity laser includes: a semiconductor gain chip; an optical waveguide; a Bragg grating; a thin film heater for tuning wavelengths; and a temperature control unit.