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Optical comb adaptive external cavity enhanced spectrum detection system and method thereof

A technology to enhance the spectrum and detection system, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of difficult operation and no significant advantages, and achieve the effect of improving detection sensitivity, improving detection sensitivity, and reducing implementation difficulty

Active Publication Date: 2016-08-10
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

However, adaptive optical comb spectroscopy has no significant advantage in light source-gas interaction
At present, the external cavity enhancement technology can significantly improve the interaction between the light source and the gas. It is difficult to directly apply the external cavity enhancement technology to the adaptive optical comb spectrum detection. It needs to meet the conditions of mode matching and delay matching at the same time.

Method used

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  • Optical comb adaptive external cavity enhanced spectrum detection system and method thereof
  • Optical comb adaptive external cavity enhanced spectrum detection system and method thereof
  • Optical comb adaptive external cavity enhanced spectrum detection system and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one ( figure 2 ): 1550nm band dual optical comb adaptive flat cavity enhanced spectral detection, implementation details:

[0044] The system includes an erbium-doped optical comb, a 1550nm frequency-locked continuous light, a 1560nm band unlocked frequency-locked continuous light, an erbium-doped pulsed laser, four optical beat frequency modules composed of couplers and detectors, frequency mixing and filtering circuits, The external cavity of the flat cavity enhances the gas chamber, the external cavity locking circuit, the beat frequency detection module, the signal processing module and the Fourier transform module.

[0045] The enhanced air chamber outside the flat chamber includes plane mirrors M1, M2, piezoelectric ceramics (PZT), and air chambers. Piezoelectric ceramics are glued to the plane mirror M2. The voltage on the ceramic controls the cavity length of the outer cavity.

[0046] The repetition frequency and carrier envelope phase of the erbi...

Embodiment 2

[0048] Embodiment two ( image 3 ): 1060nm band dual optical comb adaptive folding cavity enhanced spectral detection, implementation details:

[0049] The system includes a ytterbium-doped optical comb, a 1060nm frequency-locked continuous light, a 1064nm frequency-unlocked continuous light, a ytterbium-doped pulsed laser, four optical beat frequency modules composed of couplers and detectors, frequency mixing and filtering circuits, folding The extracavity enhances the air chamber, the outer cavity locking circuit, the beat frequency detection module, the signal processing module and the Fourier transform module.

[0050] The extra cavity of the folded chamber strengthens the air chamber, which includes plane mirrors M1-M6, piezoelectric ceramics (PZT), and air chambers. The piezoelectric ceramics are glued to the plane mirror M4. The voltage on the ceramic controls the cavity length of the outer cavity.

[0051] The repetition frequency and carrier envelope phase of the y...

Embodiment 3

[0053] Embodiment three ( Figure 4 ): 800nm ​​band dual optical comb adaptive butterfly cavity enhanced spectral detection, implementation details:

[0054] The system includes a titanium sapphire optical comb, a 780nm frequency-locked continuous light, a 760nm unlocked frequency continuous light, a titanium sapphire femtosecond laser, four optical beat frequency modules composed of couplers and detectors, frequency mixing and filtering circuits, The external chamber of the butterfly cavity enhances the gas chamber, the external cavity locking circuit, the beat frequency detection module, the signal processing module and the Fourier transform module.

[0055] The butterfly-shaped extracavity enhanced air chamber includes plane mirrors M1, M2, curved mirrors M3, M4, piezoelectric ceramics (PZT), and air chambers. Piezoelectric ceramics are glued to the plane mirror M2, and the air chamber is between the curved mirrors M3 and M4. , by adjusting the voltage on the piezoelectric...

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Abstract

The invention relates to the technical field of photoelectric detection, and concretely relates to a new technology for improving the precision of adaptive external cavity enhanced spectrum measurement through external cavity enhancement. The invention provides an optical comb detection system based on external cavity enhancement, and a method thereof. Continuous lights in the adaptive optical comb system are effectively used, the light frequency of the continuous lights is locked on the integral multiple of the optical comb repetition frequency, the external cavity is locked on the light frequency of the continuous lights to realize mode matching, and the external cavity is locked on the repetition frequency of the optical comb to realize delay matching, so the external cavity with an air chamber is locked on one the frequency locked continuous lights with the light frequency being the integral multiple of the optical comb repetition frequency in a grading locking mode, thereby the precision of the adaptive optical comb spectrum detection method is improved.

Description

technical field [0001] The invention relates to the field of photoelectric detection technology and belongs to the field of laser spectrum technology. In this method, the external cavity is enhanced, and the external cavity with the air chamber is locked on a frequency-locked continuous light whose optical frequency is equal to an integral multiple of the repetition frequency of the optical comb, thereby improving the accuracy of the adaptive optical comb spectral detection. Background technique [0002] Adaptive optical comb spectroscopy technology, as a frontier topic in the field of scientific research in recent years, not only improves the detection accuracy of optical comb, but also reduces the difficulty of optical comb control. By introducing two continuous lasers and beating with two free-running pulse lasers, the The compensation signal representing the drift of the optical comb is obtained, and then through high-speed data sampling and software compensation, the sp...

Claims

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Application Information

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IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 杨康文沈旭玲郝强曾和平
Owner UNIV OF SHANGHAI FOR SCI & TECH
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