A device and method for generating ultra-broadband optical radiation

An ultra-broadband, optical radiation technology, applied in optics, lasers, nonlinear optics, etc., can solve problems such as poor coherence and insufficient bandwidth, and achieve high flatness

Active Publication Date: 2019-05-21
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for generating ultra-broadband optical radiation, which is used to generate broadband idler light, and overcome the problems of insufficient bandwidth and poor coherence in the prior art

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  • A device and method for generating ultra-broadband optical radiation
  • A device and method for generating ultra-broadband optical radiation
  • A device and method for generating ultra-broadband optical radiation

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Embodiment 1

[0039] figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention: a mid-infrared ultra-broadband optical parametric oscillator. It includes a mode-locked laser (1), an optical isolator (2), an optical shaping system (3), a concave mirror pair (4), a nonlinear optical crystal (5), an output coupling mirror (6), and an intracavity delay adjustment Component (7) and mid-infrared filter (8). It is characterized in that: the laser light of the mode-locked laser is pumping light, and the nonlinear optical crystal is set inside the resonant cavity. The two together with the pumping laser form an optical parametric oscillator. The central wavelength of the pumping light is related to the specific signal wavelength and idler wavelength. Quasi-phase matching is realized in nonlinear crystals, and optical parametric oscillation can be realized when the optical power of the pump light is higher than the threshold of the optical parametric oscillator; couplin...

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Abstract

The invention discloses a device and method for producing ultra wide band optical radiation. According to the device and the method, a plurality of narrow-band signal beams (or idler beams) with discrete wavelengths are selected as oscillation beams through a beam split part in a resonant cavity, according to the relative time delay of the discrete wavelengths of the narrow-band signal beams selected through regulation of a time delay regulating element, the simultaneous oscillation of the discrete narrow-band signal beams in the resonant cavity is achieved, and ultra wide band idler beams produced in the resonant cavity are output. A proper frequency spectrum distance between the discrete narrow-band signal beams is selected, so that the ultra wide band beams obtained through superposition are output, and are higher in flatness, good in light coherence, easy to achieve and convenient for application. According to the device and method, no wavelength is needed to tune, and an ultra wide band laser with instant bandwidth much greater than the bandwidth of pump light can be produced to be output, and the method is simple and effective to produce ultra wide band optical radiation (the bandwidth is much greater than the bandwidth of pump light).

Description

technical field [0001] The present invention relates to a device and method for ultra-broadband optical radiation, and more particularly, to a device and method for generating ultra-broadband optical radiation based on an optical parametric oscillator that simultaneously oscillates multiple discrete narrowband signal lights. Background technique [0002] Spatially coherent ultra-broadband light sources are widely used in scientific research, component measurement, material composition detection, medical diagnosis, imaging and other fields. For example, spatially coherent ultra-broadband mid-infrared light sources can be used to achieve highly sensitive identification and quantitative detection of molecules. [0003] The thermal light source based on blackbody radiation is the most commonly used broadband light source at present; however, the blackbody radiation thermal light source is an incoherent light source with low spectral brightness, so the signal-to-noise ratio and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35H01S3/10
CPCG02F1/353G02F1/3528H01S3/10
Inventor 张兆伟刘沛
Owner HUAZHONG UNIV OF SCI & TECH
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