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Radio frequency modulation system and method of terahertz quantum cascaded laser in pulse mode

A quantum cascade and pulse mode technology, which is applied in the direction of lasers, laser devices, phonon exciters, etc., can solve the problem that pulse source signals cannot be input, and achieve the effect of increasing the lasing spectrum range

Inactive Publication Date: 2018-03-06
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, for pulse-mode THz quantum cascade lasers, this system cannot be directly used for radio frequency modulation, because the pulse source signal cannot be input into the laser through the high-frequency inductance of the T-shaped biaser
[0005] In view of the fact that there is no report on radio frequency modulation of pulsed quantum cascade lasers in the prior art, it is necessary to provide a system and method for radio frequency modulation of pulsed mode terahertz quantum cascade lasers

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  • Radio frequency modulation system and method of terahertz quantum cascaded laser in pulse mode
  • Radio frequency modulation system and method of terahertz quantum cascaded laser in pulse mode

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Embodiment Construction

[0026] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0027] like figure 1 As shown, one of the present invention, that is, a pulsed mode terahertz quantum cascade laser radio frequency modulation system, includes:

[0028] A pulse source 2 directly connected to the terahertz quantum cascade laser 9 through an electrode sheet 1, which drives the terahertz quantum cascade laser 9 to work in a pulse mode and generates temporally intermittent laser longitudinal-mode beat signals (combined with multiple When the mode continuous wave laser is free to work, the modes will interact to generate beat frequency signals. The pulse mode laser will also generate beat frequency signals when it is working. The difference is that the beat frequency signals of the latter are intermittent in time, so There is no continuous wave laser beat frequency signal stabilization);

[0029] A T-shaped bias device 4 connected to...

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Abstract

The invention relates to a radio frequency modulation system and method of a terahertz quantum cascaded laser in a pulse mode. The system comprises a pulse source, a T-shaped biasing device, a radio frequency source and a frequency spectrum analyzer, wherein the pulse source is connected with the terahertz quantum cascaded laser via an electrode plate and drives the terahertz quantum cascaded laser to work in the pulse mode and generate a beat frequency signal of the laser in a longitudinal mode, the T-shaped biasing device is connected with the terahertz quantum cascaded laser via a microstrip line, the radio frequency source is connected with the T-shaped biasing device via a circulator and is used for generating a radio frequency signal with a set frequency, and the frequency spectrum analyzer is connected with the circulator. The system has important significance to broadband formation of the terahertz quantum cascaded laser in the pulse mode.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to a radio frequency modulation system and method for a pulse mode terahertz quantum cascade laser. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves with frequencies ranging from 0.1THz to 10THz and corresponding wavelengths ranging from 3mm to 3μm, between millimeter waves and infrared light. From the perspective of physics, terahertz waves are in the transition zone from electronics to photonics; from the perspective of frequency domain, terahertz waves cover the characteristic energies of semiconductors and plasmas, the rotational and vibration energies of organic and biological macromolecules, and about 50% of the cosmic photon energy, etc.; from the application point of view, the frequency bandwidth of terahertz waves, high measurement signal-to-noise ratio, suitable for high-spatial and time-resolution imaging and signal processing in the information f...

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Application Information

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IPC IPC(8): H01S3/10H01S3/11H01S3/23
CPCH01S3/10H01S3/11H01S3/23
Inventor 万文坚黎华曹俊诚
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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