WAVELENGTH VARIABLE LASER, WAVELENGTH VARIABLE LASER DEVICE, AND WAVELENGTH VARIABLE LASER CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To facilitate wavelength control by shifting a peak wavelength without changing a peak wavelength interval.;SOLUTION: A wavelength variable laser 100 includes a DFB portion 2 including a first optical waveguide 10a including a diffraction grating forming region 10d as a region having a first diffraction grating 31 formed thereon and a gain region 10e positioned so as to continue in a waveguide direction to the diffraction grating forming region 10d, a DBR portion 3 including a second optical waveguide path 10b provided with a second diffraction grating 32a and optically coupled to the first optical waveguide 10a, a DFB portion wavelength control electrode 45 provided at a position for injecting a DFB portion wavelength control current in the diffraction grating forming region 10d in the first optical waveguide 10a of the DFB portion 2, and an electrode 41 for gain provided at a position for injecting a gain current larger than the DFB portion waveguide length control current in the gain region 10e in the first optical waveguide 10a of the DFB portion 2.;COPYRIGHT: (C)2011,JPO&INPIT