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Phase-locked system and method for terahertz quantum cascading laser

A quantum cascade, terahertz technology, applied in the field of optical applications, can solve the problems of poor versatility, low frequency mixing efficiency, complex links and high cost, and achieve the effects of improving defects, reducing complexity, and reducing technical costs and difficulties.

Active Publication Date: 2017-09-15
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a terahertz quantum cascade laser phase-locking system and method, which is used to solve the lack of THz local oscillator sources and high-quality mixers in the prior art The resulting technical problems such as complex links, high cost, low mixing efficiency, and poor versatility

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  • Phase-locked system and method for terahertz quantum cascading laser
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  • Phase-locked system and method for terahertz quantum cascading laser

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[0049] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0050] see Figure 1 to Figure 5 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic concept of the present invention, although only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the shape, quantity and proportion of each component can be changed arbitrarily during actual implementation, and ...

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Abstract

The invention provides a phase-locked system and method for a terahertz quantum cascading laser, and the phase-locked system comprises a terahertz light source module which is used for achieving the output of a terahertz signal; a terahertz signal down-conversion module which is connected with the terahertz light source module and is used for receiving a terahertz signal and generates a beat frequency signal of the terahertz signal; a phase-locked module which is connected with the terahertz signal down-conversion module and is used for receiving the beat frequency signal and generates a drive compensation signal, wherein the drive compensation signal is inputted to the terahertz light source module and is used for achieving the phase locking of the terahertz quantum cascading laser. According to the scheme of the invention, a terahertz quantum well detector is employed for down-conversion of the terahertz signal for the first time, and achieves the quick and accurate extraction of a frequency mixing signal. A multi-mode terahertz quantum well cascading laser is selected for replacing a conventional radio-frequency frequency multiplier chain terahertz local oscillator source, and the system achieves the down-conversion through a beat frequency signal, and remarkably reduces the construction difficulty and complexity of a phase-locked technological system.

Description

technical field [0001] The invention belongs to the field of optical application technology, in particular to a phase-locking system and method for a terahertz quantum cascade laser. Background technique [0002] Terahertz (THz) waves are located between millimeter waves and far-infrared rays in the electromagnetic spectrum, and have shown great application potential and value in the fields of public safety, communication transmission, biomedicine, product quality control, and atmospheric environment monitoring. . Among the many THz research directions, THz light source is regarded as the most important technical basis. A THz light source with stable performance will greatly improve the actual effect of related THz application technologies and systems, such as THz imaging resolution, THz communication bandwidth and spectral recognition efficiency, etc. are closely related to the quality of THz light source. Among many THz light sources, THz QCL has been widely studied in t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/00
CPCH01S1/00
Inventor 周涛万文坚黎华符张龙曹俊诚
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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