External cavity semiconductor laser with multi-wavelength combination

Abstract

The invention provides an external cavity semiconductor laser with multi-wavelength combination. The external cavity semiconductor laser comprises a plurality of semiconductor laser units, alignment optical lenses arranged in order on output optical paths of the semiconductor laser units, dispersion optical elements, and partial reflectors. The plurality of semiconductor laser units are in a array arrangement, and a plurality of resonant external cavities are formed by each semiconductor laser unit, the dispersion optical element, and the partial reflector. In the formed structure of the external cavity, the each semiconductor laser unit automatically adjusts the output wave of the semiconductor laser unit, so that a multi-wavelength light beam finally output by the partial reflector is a parallel and single laser with multi wavelengths. According to the external cavity semiconductor laser with multi-wavelength combination provided in the invention, an effective multi-wavelength laser light source is provided; an actual lasing wavelength of each die are stabilized automatically to be a wavelength that is needed to make the system work cooperatively.

Description

technical field [0001] The invention relates to a semiconductor external cavity laser, in particular to a multi-wavelength external cavity semiconductor laser. Background technique [0002] Semiconductor lasers are widely used in optical fiber communication, optical fiber sensing, medical detection, environmental monitoring, scientific research and other fields. External cavity semiconductor lasers usually affect the working mode and output characteristics of the laser by feeding back a part of the light output of the laser through a dispersive element or a non-dispersive element and returning it to the laser. Usually, the feedback element is located within the coherence length of the laser. If the feedback element is located outside the coherence length of the laser, the laser is in a state of coherence collapse, which can be considered as a generalized external cavity laser. The current external cavity lasers include holographic grating external cavity lasers, fiber grati...

AI Technical Summary

Problems solved by technology

However, in the various types of external cavity lasers mentioned above, a gain element and a feedback element constitute an external cavity laser. There is no solution that can simultaneously perform joint feedback of multiple laser gain regions at different wavelengths, so that they can work together

Similarly, multiple lasers with different wavelengths are also difficult to efficiently combine to become a light source

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