Debugging apparatus and method based on chirp management laser

Abstract

The invention discloses a debugging device and a method based on a chirped management laser; the method comprises the following steps: modulation signals produced by an optical domain are converted into electric-domain signals for modulating the laser; the received command signals are converted into simulating control signals for controlling the working state of the laser, and bias current of the laser, tube core temperature and radio-frequency voltage of AC coupling are set according to the simulating control signals; by comparison, if extinction ratio is not in the required range or is not in accordance with the presetting standard of an eye pattern, the temperature of a spectrum shaping element is adjusted. Compared with the prior art by repeatedly debugging according to the loss of the filter, the steps of the method is less, the debugging procedure is obviously simplified, thus improving the debugging efficiency; the debugging device only adopts a radio-frequency voltage amplitude control unit, a temperature control, a bias current control unit and a laser tube core temperature control unit for carrying out debugging, thus simplifying debugging procedure and improving the debugging efficiency.

Description

technical field [0001] The invention relates to intensive light wave multiplexing technology, in particular to a debugging device and method for a chirp-based management laser. Background technique [0002] Lasers include directly modulated lasers (directly modulated laser, DML) and electro-absorption modulated lasers (Electro-Absorption Modulated Laser, EML). In the existing 10Gb / s DML laser, a special filter made by Chirp Managed technology is adopted to form a Chirp Managed Laser (CML). The special filter used in the CML laser is actually a spectral shaping element (Optical Spectrum Reshaper, OSR), which is used to process the emission spectrum output by the laser after direct modulation, and filter out the chirp that is not conducive to transmission. . Because when the distributed feedback (Distributed Feed Back, DFB) laser injects a large bias current, the laser enters the saturated light emitting state, and after adding the direct modulation current, the laser adiaba...

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Problems solved by technology

Then, it is also necessary to determine the relative locking position of the central wavelength and the OSR according to the filter loss (Filter Loss). The filter loss refers to the output power when the central wavelength is locked at the center point of the OSR when the laser is not modulated. The output power difference when the signal is locked to the best lock point. At this stage, it is necessary to use the spectrometer to observe the chirp information in the spectrum to select an optimal operating point to achieve the best transmission performance ratio. The debugging is complicated and the debugging efficiency is very low. , not suitable for mass production

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