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Tunable laser with a fixed and stable wavelength grid especially useful for WDM in fiber optic communication systems
Tunable laser with a fixed and stable wavelength grid especially useful for WDM in fiber optic communication systems
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机译:具有固定和稳定波长网格的可调谐激光器,特别适用于光纤通信系统中的WDM
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摘要
A wavelength tunable mode-locked laser system including a complex laser cavity comprising a broadband reflective mirror at one end and a wavelength chirped selective mirror at the other end. The system further includes a gain element and a low finesse Fabry-Perot etalon element inside the laser cavity. The gain element may be a semiconductor laser chip, with a broadband high reflection coating at one end and a partially reflecting coating at its other end. The gain element has a well-defined length, such that its longitudinal modes match a required optical frequency grid. The system also includes an active modulation element applied externally on said complex laser cavity to provide mode-locking of a specific cavity length among said defined predetermined cavity lengths, such that all possible optical frequencies emitted by the laser system are stabilized to the linear grid dictated by the Fabry-Perot longitudinal modes, that could be in accordance with the International Telecommunications Union standards.
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