Self-cooling laser optical tweezers device and method based on two-dimensional light trap

A self-cooling and optical trap technology, applied in the fields of optical engineering and precision measurement, to achieve strong practical effects, high-speed self-cooling, and wide application range

Active Publication Date: 2019-06-21
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The device and method of using double optical traps to combine optical tweezers into a ring cavity to realize high-speed self-cooling have not been reported yet.

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  • Self-cooling laser optical tweezers device and method based on two-dimensional light trap
  • Self-cooling laser optical tweezers device and method based on two-dimensional light trap
  • Self-cooling laser optical tweezers device and method based on two-dimensional light trap

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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] like figure 1 As shown, a self-cooling laser optical tweezers device based on a two-dimensional optical trap consists of a pump laser 1, a wavelength division multiplexer 2, a doped fiber 3, isolators 4 and 5, a laser 6, a beam splitter 7, Composed of double optical trap 8, ellipsoid ellipsoid particle 9, and position detector 10. The laser light emitted by the laser 6 passes through the beam splitter 7 and enters the two-dimensional optical trap 8 from ends a and c to form a double-beam optical trap to trap ellipsoidal particles 9 along the long axis. The laser 6, the beam splitter 7, the two-dimensional optical trap 8 and the ends a and c constitute a main trapping loop, and the power of the main trapping loop is relatively high, so that the long axis of the p...

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Abstract

The invention relates to a self-cooling laser optical tweezers device and method based on a two-dimensional light trap. The light tweezers is combined to a light cavity, and the high-speed self-cooling for capturing ellipsoid particles is realized by utilizing the ellipsoid particles location and the characteristics of the cavity loss; the whole cooling process does not involve to the external feedback control, and is realized through the internal self-feedback of a ring cavity. The device has the advantages of being simple in structure, good in repeatability and strong in practicability. Furthermore, the self-cooling laser optical tweezers device is not limited to the light trap structure and the light path structure, and the applicable range is extremely wide.

Description

technical field [0001] The invention relates to a self-cooling laser optical tweezers device and method based on a two-dimensional optical trap, belonging to the field of optical engineering and the field of 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". ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21K1/00
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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