Liquid nitrogen cooling system of terahertz quantum cascade laser and laser using it

Abstract

A liquid nitrogen cooling system for terahertz quantum cascade lasers and a laser using the same are disclosed. The liquid nitrogen cooling system comprises a liquid nitrogen dewar flask and a tube core installation base. The inner shell of the liquid nitrogen dewar flask is of an 'L'-shaped structure. The tube core installation base is disposed at one end of the corner of the inner shell of the liquid nitrogen dewar flask, and is integrated with the inner shell. The tube core installation base is provided with a groove used for accommodating a laser tube core heat sink and a square table used for fixedly installing the laser tube core heat sink. With the liquid nitrogen refrigeration terahertz quantum cascade laser encapsulation structure provided by the invention, a terahertz quantum cascade laser can dissipate heat fully in the working process and can work at liquid nitrogen temperature. Moreover, outgoing light can be collected fully using optical elements such as a light cone and a lens, and light beams can be shaped, thus ensuring high enough optical power and good beam quality.

Description

technical field [0001] The invention relates to the fields of vacuum refrigeration and terahertz technology, in particular to a liquid nitrogen cooling system for a terahertz quantum cascade laser and a laser using the same. Background technique [0002] Terahertz (THz imaging) frequency range is located between the rapidly developing electronic technology and photonic technology in the electromagnetic spectrum, and is usually defined as 0.1-10 THz, corresponding to the wavelength range of 3000-30 μm. THz waves have great scientific value and broad application prospects in spectral imaging, security and anti-terrorism, broadband communications, and astronomical research. The "Science and Technology Review" published in the United States in 2004 listed THz technology as one of the top ten technologies that will change the future world. The "New Development of Terahertz Science and Technology" was also proposed at the 270th Xiangshan Science Conference. Terahertz quantum cas...

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Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to propose a liquid nitrogen cooling system for terahertz quantum cascade lasers, so as to solve the problem of high heat generation of terahertz quantum cascade lasers, provide a large enough cooling capacity, and efficiently collect In order to realize the working requirements of the quantum cascade laser at the temperature of liquid nitrogen

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