Rapid tunable semiconductor laser and preparation method based on reconstitution-equivalent chirp

Abstract

The invention discloses a rapid tunable semiconductor laser based on reconstitution-equivalent chirp. DFB lasers which are different in working wavelengths, on the basis of a reconstitution-equivalent chirp technology, are integrated on the same laser integration chip in a mixing manner of serial connection and parallel connection, so that a laser matrix structure is formed; the wavelength of each laser in the chip is fixed and conforms to the international standard; the laser matrix is provided with corresponding matrix voltage control; one of the lasers is selected to work by controlling the flow amount of the electric current and option switches of circuits; the lasers in serial connection in the laser matrix structure respectively adopt an electrical isolation area to decrease the electrical crosstalk between the two adjacent lasers, so that the independent control of the wavelength of each laser is realized; after coupled, optical signals with different wavelengths in the matrix of lasers in serial connection and in parallel connection are output from the same waveguide; the reconstitution-equivalent chirp technology is used for designing a single DFB semiconductor laser in the laser array matrix, and when a certain wavelength is needed, the corresponding DFB laser is lightened.

Description

1. Technical field [0001] The invention belongs to the field of optoelectronic technology, and is related to distributed feedback (DFB) semiconductor lasers, in particular to the design and manufacture of complex distributed feedback tunable semiconductor lasers, and more specifically, is a low-cost and fast method based on reconstruction-equivalent chirp technology. Method and device for tunable DFB semiconductor laser. 2. Background technology [0002] Modern optical communication systems are based on wavelength division multiplexing (WDM) technology, and WDM technology itself is defined from the perspective of wavelength, so wavelength itself has become one of the most important resources in optical communication systems. The development of available wavelength channel resources and how to improve the utilization efficiency of these wavelength channels has become a hot research issue. Tunable laser (TL: Tunable Laser) research has continued for nearly 30 years, as a new ...

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Problems solved by technology

However, due to the high cost of the electron beam exposure technology, the writing speed is very slow, and due to the characteristics of the electron beam itself, the accuracy of the working wavelength of the laser array produced by it is not enough, which affects the quality or cost of the laser array, thereby reducing the laser. performance, increasing the cost of the laser

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