Phase-locked system and method for terahertz quantum cascading laser

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...

AI Technical Summary

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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