WAVELENGTH MANAGEMENT MODULE AND WAVELENGTH MANAGEMENT APPARATUS

摘要

PROBLEM TO BE SOLVED: To miniaturize a wavelength management apparatus by employing a wavelength selection means so as to maintain an oscillation wavelength from a light source at a predetermined wavelength for use. SOLUTION: There are provided a waveguide-type optical branching means 111 having functions of making signal light oscillated from a light source 1 branch into main signal light S and monitoring signal light M, and making the monitoring signal light M branch into first branching signal light M1 and second branching signal light M2, a first measurement means 15 which measures light intensity of the first branching signal light M1, and a second measurement means 17 which measures light intensity of the second branching signal light M2. Further, a wavelength selection means 14 having wavelength-dependent transmittance is provided on an optical path of the first branching signal light M1. The first measurement means 15 measures the light intensity transmitted through the wavelength selection means 14.