Patent ID: 6496288
Filing Date: 2002-12-17
Classification: H04B,H04J

Abstract:
A wavelength multiplexing transmission apparatus, comprising:a plurality of optical signal outputting sections outputting optical signals having wavelengths different from each other; and a wavelength multiplexing section wavelength multiplexing the optical signals outputted from said optical signal outputting sections and sending out a resulting optical signal; each of said optical signal outputting sections including: a light source module including a transmission light source outputting an optical signal of a predetermined wavelength, a temperature detecting section detecting an environment temperature of said transmission light source, and a heating/cooling section varying the environment temperature of said transmission light source; a temperature control section outputting a control signal based on the temperature information detected by said temperature detecting section to said heating/cooling section to control said heating/cooling section so that the environment temperature may be stabilized at a reference temperature set in advance; an ambient temperature detecting section detecting an ambient temperature of said light source module; and an abnormal condition detecting section detecting an abnormal condition of said light source module based on the control signal from said temperature control section to said heating/cooling section and the ambient temperature information detected by said ambient temperature detecting section.