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Quantum cascade laser

A quantum cascade, laser technology, applied in lasers, phonon exciters, laser parts and other directions, can solve the problem of difficulty in increasing laser power

Pending Publication Date: 2021-12-14
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, distributed feedback gratings are prone to overcoupling in long cavity length devices, which makes it difficult to increase the laser power

Method used

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that if there are directional indications involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes , then the directional indication changes accordingly.

[0033] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated...

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Abstract

The invention provides a quantum cascade laser. The quantum cascade laser comprises a substrate, a lower waveguide layer, a lower limiting layer, a first active layer, a spacing layer, a second active layer, an upper limiting layer and an upper waveguide layer which are sequentially arranged from bottom to top, wherein the quantum cascade laser comprises two Bragg reflectors and two gain regions, the two Bragg reflectors and the two gain regions are sequentially arranged at intervals in a staggered mode in the transverse direction, and the upper limiting layer is provided with Bragg grating structures corresponding to the two gain regions. In the technical scheme provided by the invention, the upper waveguide layer is provided with the two gain regions, the upper limiting layer is correspondingly provided with the two Bragg grating structures, the lasing characteristic of the double active regions is regulated and controlled, and the Bragg reflectors and the gain regions are arranged on the upper waveguide layer in a staggered manner, so partitioned driving is realized, and the compact high-power dual-wavelength quantum cascade laser with precise wavelength regulation and control can be obtained.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a quantum cascade laser. Background technique [0002] Dual-wavelength lasers have the advantages of simple and compact structure and high output beam quality. In recent years, they have broad application prospects in medical and environmental monitoring, fine laser spectroscopy, and free space communication. At present, most dual-wavelength lasers are solid-state lasers using a single gain medium. When two wavelength lasers are generated in the same gain medium, there is a fierce gain competition, which affects the stability of the laser output. On the other hand, the simultaneous output of dual-wavelength lasers can be obtained by coordinating the mode competition between the two oscillation wavelengths in the resonator through an external grating element, but the external optical system requires an extremely stable ability to resist environmental influences. [0003] Q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/34H01S5/20H01S5/125H01S5/12
CPCH01S5/3401H01S5/2018H01S5/125H01S5/12
Inventor 管延娇王利军卓宁张锦川翟慎强刘舒曼刘俊岐刘峰奇
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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