Semiconductor chip and semiconductor laser

Abstract

The invention discloses a semiconductor chip and a semiconductor laser, and the semiconductor chip is used for being arranged in the semiconductor laser and comprises at least one gain region; the upper surface and the lower surface of each gain region are plated with electrodes respectively; and the shape of at least one electrode is matched with the resonant light path of the laser in the gain region. On one hand, according to the semiconductor chip, by setting the shape of the electrode to be matched with the resonant light path of the laser in the gain region, efficient overlapping of thegain region and an external cavity laser mode can be realized; on the other hand, the gain length of the outer cavity can be far greater than the gain length of the inner cavity and the maximum widthof amplified spontaneous emission (ASE) in structure; meanwhile, the laser threshold of the inner cavity can be improved by matching with a coating technology, so that the inner cavity laser and ASE are inhibited, and high-efficiency high-beam-quality outer cavity semiconductor laser output is realized; and meanwhile, ridge etching is not needed, so that the cost can be reduced, and the modulationeffect of the chip on external cavity laser is avoided.

Description

technical field [0001] The invention relates to the technical field of laser devices, in particular to a semiconductor chip and a semiconductor laser. Background technique [0002] Semiconductor lasers use semiconductor materials as the gain medium, use electrons to transition between energy levels to emit light, and directly use parallel mirrors formed on the cleavage surface of semiconductor crystals to form a resonant cavity, and form optical oscillation feedback under electrical injection to generate light radiation amplification. Achieve laser output. Semiconductor lasers have the highest electro-optical conversion efficiency among current lasers, and the electro-optical conversion efficiency can reach 70%. And the semiconductor laser is also the laser with the widest wavelength range, the strongest adaptability and reliability, and the lowest mass production cost. However, due to the small size of the resonant cavity of the semiconductor laser (usually millimeter-sca...

AI Technical Summary

Problems solved by technology

However, the applicant found in the process of further research on the semiconductor laser with wide ridges that the structure of the semiconductor chip has a high impact on the electro-optical efficiency of the semiconductor laser. If the existing semiconductor chip is used, it is impossible to achieve an effective high beam. Quality external cavity laser output

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