Tatsuro Kurobe , Tatsuya Kimoto , Kengo Muranushi , Toshikazu Mukaihara , Maiko Ariga , Nozomu Matsuo and Akihiko Kasukawa
Abstract
A novel laser module has been developed comprising a tunable laser that is indispensable as a signal light source for increasing the capacity of DWDM systems. DFB laser array known for its wavelength stability in principle has been employed for the wavelength tuning scheme. The module includes a low-noise semiconductor amplifier enabling high-power operation. This paper describes the structure, operating principle and optical characteristics of this wavelength tunable laser, and also presents the structure, characteristics and reliability of the laser module with a built-in wavelength locker.
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