Anritsu Corporation

Hidetoshi Miyao

Takao Tanimoto

Takeshi Tsukamoto

A system for measuring a chromatic dispersion of an optical fiber based on a baseband phase comparison method has an optical signal transmitter, a reference optical fiber, a measurement optical fiber, and an optical signal receiver. The transmitter has n light sources for selectively generating, as measurement optical signals, optical signals having wavelengths corresponding to n wavelength points to be measured. One of the n light sources also serves to generate a reference optical signal. The transmitter further has an optical switch. The optical switch has n optical signal inputs arranged in correspondence with the n light sources, a measurement optical signal output, and a reference optical signal output. The optical switch commonly outputs, to the measurement optical signal output, the measurement optical signal which is output from the designated one of the n light sources and is selectively input to the n optical signal inputs. A half mirror is provided for outputting the reference optical signal generated by one of the n light sources to the reference signal output. The optical signal receiver is coupled to the reference optical fiber and the measurement optical fiber, and receives the reference optical signal from the reference optical fiber and the measurement optical signal from the measurement optical fiber, respectively, for measuring chromatic dispersion. The receiver includes a plurality of programmable optical attenuators.

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Yokohama, Japan

Hidetoshi Miyao