WAVELENGTH STABILIZATION UNIT FOR STABILIZING WAVELENGTHS OF LASER BEAMS AND WAVELENGTH STABILIZATION MODULE FOR STABILIZING WAVELENGTHS OF OPTICAL SIGNALS

摘要

PURPOSE: A wavelength stabilization unit for stabilizing wavelengths of laser beams and a wavelength stabilization module for stabilizing wavelengths of optical signals are provided to stabilize an optical output and a wavelength current characteristic by using a first linear part and a second linear part parallel to the first linear part. CONSTITUTION: A first light receiving unit(18) receives partially laser beams outputted from a semiconductor laser. A wavelength filter(12) receives partially the laser beams and has a transmittance varied according to wavelengths of the received laser beams. A second light receiving unit(19) receives the laser beams through the wavelength filter. The first light receiving unit is installed at a first edge. The second light receiving unit is installed at a second edge near to the first edge. The first edge includes a first linear part. The second edge includes a second linear part parallel to the first linear part.