Characterization method and device of tunable laser

Abstract

The invention relates to a characterization method and device of a tunable laser, which are used for realizing rapid and accurate characterization of the tunable laser, have universality, and are suitable for a tunable laser having an arbitrary number of control signals. The method includes the following steps: output light of the tunable laser is coupled into an optical fiber, and is then split into two paths through a beam splitter, one path passes through an optical band-pass optical filter, the other path passes through an optical band rejection filter, and central wavelengths of the optical band-pass filter and the optical band rejection filter are set at a target wavelength [lambda]0, and are then connected to a detector; control signals of the tunable laser are changed and optical power detected by the detector is collected through a computer or a microprocessor; and an initial control signal combination is generated randomly, a ratio R of the optical power P1 that passes through the optical band-pass filter and the optical power P2 that passes through the optical band rejection filter is used as a criterion for optimization, and a control signal combination required by stable output of the target wavelength [lambda]0 is searched through an optimization algorithm.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a characterization method and device for a tunable laser. Background technique [0002] With the rapid development of optical communication technology, tunable lasers have received extensive attention and research. In dense wavelength division multiplexing systems and next-generation reconfigurable optical networks, tunable lasers are regarded as one of the indispensable key devices. In recent decades, researchers have proposed many different tuning schemes for tunable lasers. Among them, commercially available monolithic integrated tunable lasers mainly include distributed feedback (Distributed Feedback, DFB) laser arrays, distributed reflection (Distributed Bragg Reflector, DBR) and tunable lasers with similar structures. The DFB laser achieves wavelength tuning by changing the Bragg wavelength of the grating through temperature control. For example, the tempera...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a new characterization method and device for tunable lasers, which overcomes that the existing characterization methods of tunable lasers need to scan control signals point by point and are not suitable for tunable lasers with more than 3 control signals. Drawbacks of Tuned Lasers

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