A terahertz spectrum analyzer

A spectrum analyzer, terahertz technology, applied in the field of terahertz spectrum analyzer, can solve the problems of difficult frequency measurement, low frequency of light wave signal, measurement frequency, etc.

CN104330160BActive Publication Date: 2017-01-18NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-18

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Abstract

The invention provides a terahertz spectrum analyzer which comprises a laser, three optical fiber couplers which are a first optical fiber coupler, a third optical fiber coupler and a fourth optical fiber coupler, an optical switch, a frequency shift ring, three optical delay lines which are a second optical delay line, a third optical delay line and a fourth optical delay line, a photoelectric detector, two photoelectric converters with terahertz detection antennas, two terahertz focusing elements and a terahertz optical splitter. In the acceleration of a terahertz electric field, photon-generated carriers are in accelerated motion to generate current which is proportional to the electric field amplitude of a terahertz wave, current is measured respectively, then square and sum are calculated, the radiation power of the terahertz wave is obtained, the frequency of the terahertz wave is obtained from the time sequence of the current, and the spectrum of the terahertz wave can be obtained. The terahertz spectrum analyzer has the advantages of wide spectral range, high spectral resolution and important scientific significance and application value and works at a room temperature.
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Description

technical field

[0001] The invention relates to a terahertz spectrum analyzer, in particular to a terahertz spectrum analyzer based on photon mixing and a photoelectric converter with a terahertz detection antenna. Background technique

[0002] Terahertz (THz) waves are between millimeter waves and infrared light, corresponding to wavelengths from 3 mm to 30 μm, and generally refer to broad-spectrum electromagnetic waves with frequencies from 100 GHz to 10 THz. In recent years, due to the broad application prospects of THz waves in many fields such as material science, physics, life science, information technology, astronomy and national defense security, THz science and technology research has achieved rapid development. At present, the increasing development of THz technology has put forward the requirement for the measurement equipment to expand to higher frequencies, and the spectrum analyzer is an effective equipment for measuring the signal frequency.

[0003] The ter...

Examples

Embodiment Construction

[0034] Below in conjunction with specific embodiment and accompanying drawing, technical solution of the present invention is described in detail:

[0035] Such as figure 1As shown, the first embodiment of the terahertz spectrum analyzer provided by the present invention includes a first laser 1, a first fiber coupler 2, a first optical switch 3, a first frequency shifting ring 4, a third fiber coupler 5, The fourth optical fiber coupler 6, the second optical delay line 7, the third optical delay line 8, the first photodetector 9, the first photoelectric converter with terahertz detection antenna 10, the second photoelectric converter with terahertz detection antenna Converter 11, first terahertz focusing element 12, second terahertz focusing element 13, fourth optical delay line 14, first terahertz beam splitter 15; first frequency shifting ring 4 includes: second fiber coupler 41, A first optical delay line 42 , a first optical amplifier 43 , a first frequency shifter 44 , ...