A semiconductor laser based on a coating-free chip
A semiconductor and laser technology, applied in the field of lasers, can solve the problems of limiting the output power, reducing the damage threshold of the light-emitting end face of the chip, etc., to achieve the effect of increasing the output power, increasing the damage threshold, and simplifying the manufacturing process
Active Publication Date: 2021-02-26
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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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-optic efficiency of the semiconductor laser. Chip coating, and the coating will reduce the damage threshold of the light-emitting end face of the chip, thereby limiting the output power
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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0034] A schematic structural diagram of a semiconductor laser according to an embodiment of the present invention is shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity. The shapes of the various regions and layers shown in the figure, as well as their relative sizes and positional relationships are only exemplary, and may deviate due ...
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Abstract
A semiconductor laser based on a coating-free chip, comprising: a semiconductor chip, a reflector and an output mirror arranged along the optical path in sequence; the semiconductor chip, the reflector and the output mirror are used to form a laser resonant cavity, so that The laser in the laser resonant cavity is incident on the semiconductor chip at Bruce's angle; the end face of the semiconductor chip is provided with a transmission port for incident and exit of the laser light; the transmission port is free of coating. In the semiconductor laser provided by the embodiment of the present invention, by setting the laser to inject into the gain region of the chip at the Brews angle, no coating is required on the end face of the chip for laser access, which simplifies the chip preparation process and reduces the cost. At the same time, the damage threshold is increased, which can increase the output power.
Description
technical field [0001] The invention relates to the technical field of lasers, in particular to a semiconductor laser based on a coating-free chip. 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-scale ...
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IPC IPC(8): H01S5/02H01S5/10H01S5/06
CPCH01S5/02H01S5/06H01S5/10
Inventor 王小军宗楠彭钦军许祖彦杨晶薄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI