Three-dimensional self-cooling laser optical tweezers device and method based on lens combination

A lens combination and self-cooling technology, which is applied in the fields of optical engineering and precision measurement, achieves the effects of wide application range, strong practical effect and strong practicability

Active Publication Date: 2019-05-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

A device and method for combining optical tweezers into a ring cavity to achieve three-

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  • Three-dimensional self-cooling laser optical tweezers device and method based on lens combination
  • Three-dimensional self-cooling laser optical tweezers device and method based on lens combination
  • Three-dimensional self-cooling laser optical tweezers device and method based on lens combination

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Embodiment Construction

[0026] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0027] Such as figure 1 As shown, a three-dimensional self-cooling laser optical tweezers device based on lens combination, including pump laser 1, wavelength division multiplexer 2, doped fiber 3, isolator I4 and isolator II5, collimator I6 and collimator Device II7, reflector I8 and reflector II9, lens I10 and lens II11, particle 12, illumination source 13, position detector I14 and position detector II15, pump laser 1 enters the doped fiber after passing through the wavelength division multiplexer 2 3. Doping the gain medium in the optical fiber 3 to obtain the pumping laser light of the pumping laser 1 . After the laser passes through the isolator I4 and the isolator II5 with different wavelengths, two laser light paths with different wavelengths, clockwise and cou...

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Abstract

The invention relates to a three-dimensional self-cooling laser optical tweezers device and method based on lens combination. The three-dimensional self-cooling laser optical tweezers device based onlens combination is adopted to achieve three-dimensional self-cooling. According to the invention, the method combines optical tweezers into an optical cavity, and achieves the three-dimensional high-speed self-cooling of captured particles by means of the three-dimensional positions of microspheres and the characteristic of cavity loss. The whole cooling process does not involve external feedbackcontrol and is achieved through self feedback in the annular cavity. The device is simple in structure, is good in repeatability, is high practicability and the like. In addition, the device is not limited to an optical trap structure and an optical path structure, and the application range is very wide.

Description

technical field [0001] The invention relates to a three-dimensional self-cooling laser optical tweezers device and method based on lens combination, belonging to the field of optical engineering and precision measurement technology. Background technique [0002] Light has momentum and energy, and the specific performance of light momentum is light force. Two Gaussian laser beams propagating in opposite directions can form a double-beam optical potential well capable of confining micron-scale particles, referred to as a double-beam optical trap. Dual-beam optical traps can realize optical manipulation functions such as optical trapping, optical traction, optical stretching and photo-induced rotation, and have broad application prospects in the field of precision measurement. [0003] Optical manipulation mainly uses the mechanical effect of light to trap particles in tiny light traps, so that the movement of particles is restricted, which is macroscopic "cooling". General c...

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Application Information

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IPC IPC(8): H01S3/067G21K1/00
Inventor 肖光宗邝腾芳陈鑫麟韩翔杨开勇罗晖
Owner NAT UNIV OF DEFENSE TECH
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