Vertical cavity surface emitting laser and control method and control device thereof

Abstract

The invention discloses a control method of a vertical cavity surface emitting laser. The control method comprises the following steps: receiving a temperature reading signal of an active region of the vertical cavity surface emitting laser; determining a corresponding cavity length parameter according to the temperature reading signal; and according to the cavity length parameter, an outer cavitymirror of the vertical cavity surface emitting laser displacing along the direction of an optical path so as to adjust the cavity length of a resonant cavity mode, and the wavelength of the adjustedresonant cavity standing wave coinciding with the peak wavelength of an active region gain spectrum of the vertical cavity surface emitting laser. According to the invention, the wavelength of the standing wave of the resonant cavity coincides with the peak wavelength of the gain spectrum of the active region of the vertical cavity surface emitting laser in a wide temperature range, the optical gain of the active region of the surface emitting chip to the resonant cavity mode is maximized in a wide working temperature range, the output optical power is improved, and the emission threshold is reduced. The invention also provides a control device of the vertical-cavity surface-emitting laser and the vertical-cavity surface-emitting laser, which have the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of novel semiconductor lasers, in particular to a vertical cavity surface emitting laser and its control method and control device. Background technique [0002] Vertical-cavity surface-emitting laser is a semiconductor laser whose light emitting direction is perpendicular to the chip surface. Compared with traditional edge-emitting semiconductor lasers, it has ultra-low electrical power loss, direct detection at the wafer level, easy fiber coupling, single longitudinal mode lasing and Natural advantages such as building a two-dimensional luminescent matrix. In several application scenarios where vertical cavity surface emitting lasers have great potential, such as sensing applications such as atomic clocks and magnetometers, or high-speed data transmission applications in data centers, etc., the light source usually requires the ability to work at high temperatures. [0003] In the existing related product...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a vertical cavity surface emitting laser and its control method and control device to solve the problem that the vertical cavity surface emitting laser in the prior art can maintain a high output operating temperature range is too small, and the output exceeds the preset range The problem of rapid drop in optical power

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