Terahertz pulse single-shot detection system and detection method based on single-mode fiber
A terahertz pulse and single-mode fiber technology, applied in the field of terahertz time-domain spectroscopy system research, can solve the problems of large overall volume, poor integration and portability, and high cost, and achieve the solution of large overall volume, laser pulse broadening and acceleration The effect of chirping process simplification
Active Publication Date: 2018-03-27
NANKAI UNIV
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a single-shot detection system and detection method for terahertz pulses based on single-mode fiber, to realize the convenience of laser pulse broadening and chirping process, and the detection of terahertz pulses. Single-shot detection solves the problems of existing terahertz single-shot detection systems such as large overall volume, complex structure, high cost, poor integration and portability, etc.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0027] figure 1 Schematic diagram of single-shot detection system for terahertz pulses based on single-mode fiber. The laser used in the embodiment of the present invention is femtosecond laser-1, the central wavelength of the laser pulse is 800nm, the pulse width (full width at half maximum) is 50fs, and the repetition frequency is 1kHz. The femtosecond laser pulse is divided into two paths by the beam splitter-2, the directly transmitted one is the pumping laser pulse, and the vertically reflected one is the detection laser pulse. The detection laser pulse is coupled into the single-mode fiber-4 through the first fiber coupler-3, broadened and chirped during transmission, then exits from the fiber collimator-5, and then transmits through the polarizer-6 . The pump laser pulse is reflected by the gold reflector-7, focused by the focusing lens-8, forms a filament-9 in the air, and radiates a terahertz pulse-10. After the terahertz pulse is transmitted from the Teflon plate-...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A terahertz pulse single-shot detection system and detection method based on a single-mode optical fiber. Solve the problem that the current terahertz time-domain spectroscopy single-shot detection technology generally uses separate optical elements to form a laser pulse stretching and chirping device for the detection optical path, which makes the system large in size, complex in structure, high in cost, and poor in integration and portability. . The present invention directly couples femtosecond laser pulses into a single-mode optical fiber for transmission. Due to the dispersion effect of the optical fiber, the femtosecond laser pulse can be broadened and chirped, thus simplifying the system structure, reducing costs, and strengthening integration and portability.
Description
technical field [0001] The invention belongs to the technical field of "terahertz time-domain spectroscopy system research", and specifically relates to a terahertz pulse single-shot detection system based on a single-mode fiber, which realizes the simplification of the laser pulse broadening and chirping process, and the terahertz pulse detection system. single probe. Background technique [0002] "Tahertz wave" is a general term for a specific band of electromagnetic waves. It refers to the frequency spectrum range between 0.1 and 10THz. It is located between millimeter waves and infrared waves in the electromagnetic spectrum, so it is also called "submillimeter wave". . Because of its special position in the transition from electronics to photonics, "terahertz wave" has "selective transmission of polar-nonpolar materials", "operating safety with low single-photon energy", and "fingerprint Spectral detection and analysis" and other unique properties have very important r...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01J11/00
Inventor 刘伟伟田浩琳赵佳宇陈平林列龚诚杨晶郭兰军
Owner NANKAI UNIV