Device and method for quickly coupling laser with large divergence angle to single-mode fiber

A technology of single-mode fiber and large divergence, which is applied in the field of devices that couple laser with large divergence angle to single-mode fiber and quickly couple laser with large divergence angle to single-mode fiber. advanced questions
CN110632713BActive Publication Date: 2021-05-07珠海市运泰利自动化设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
珠海市运泰利自动化设备有限公司
Publication Date
2021-05-07

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Abstract

The invention provides a device and method for quickly coupling a large divergence angle laser to a single-mode optical fiber with a simple structure, small volume, and suitable for coupling a large divergence angle laser. The invention comprises a laser chip, a collimating mirror, a beam splitter, a corner cube, an industrial camera, a coupling objective lens and a fiber optic circulator; the method for optical fiber coupling is as follows: light the laser chip, pass through the beam splitter and the corner cube, and place it in the industrial camera A reference spot is formed on the upper surface of the fiber laser, and the fiber laser is turned on. The laser beam emitted by the fiber laser is incident from port 1 of the fiber circulator, and then exits from port 2 of the fiber circulator. Imaging in the industrial camera to form a coupling spot; finally, the reference spot and the coupling spot in the industrial camera image coincide, indicating that the laser chip (1) is in the same alignment as the coupling end face of the single-mode fiber to be coupled, and the coupling is completed. The invention can be applied to the field of optical fibers.
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Description

technical field

[0001] The invention relates to the field of optical fibers, in particular to a device for quickly coupling laser with a large divergence angle to a single-mode fiber and a method for coupling the laser with a large divergence angle to the single-mode fiber by using the device. Background technique

[0002] Optical fiber is the transmission channel of optical signal and the key material of optical fiber communication. The two main characteristics of optical fiber are loss and dispersion. Loss is the attenuation or loss of the optical signal per unit length, expressed in db / km. This parameter is related to the transmission distance of the optical signal. The greater the loss, the shorter the transmission distance. The dispersion of the fiber is mainly related to the pulse broadening.

[0003] According to the transmission mode of light in the optical fiber, it can be divided into: single-mode optical fiber and multi-mode optical fiber. The central glass cor...

Claims

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