Method for reflectively adjusting optical-mechanical coaxiality of optical fiber collimator

Abstract

The invention relates to a method for reflectively adjusting optical-mechanical coaxiality of an optical fiber collimator. The method includes the steps: sequentially adjusting the position of the optical fiber collimator (3) up and down and front and back; and observing optical powers received by an optical power meter (9.3). When the optical powers in the up and down direction and in the front and back direction are simultaneously the highest, the emergent direction of a laser beam is perpendicular to a reflector (2), and the reflector (2) is perpendicular to a mechanical axis serving as a datum, so that optical-mechanical coaxiality is realized. An adjusting device is simple in structure, adjusting steps are fewer, the process is simple, the mechanical axis of the optical fiber collimator is used as the datum, the emergent direction of the laser beam is changed by adjusting the position of the optical fiber collimator up and down and front and back until the emergent direction of the laser beam is consistent with the direction of the mechanical axis serving as the datum, and accordingly, the optical fiber collimator has high-precision optical-mechanical coaxiality.

Description

technical field [0001] The invention relates to a reflective method for adjusting the optical-mechanical coaxiality of an optical fiber collimator. Background technique [0002] In fiber optic devices, the fiber collimator is a key device. Traditional fiber collimators such as figure 1 As shown, it is mainly composed of optical fiber and its fixing structure, lens, and peripheral fixing parts. Due to the gap between the peripheral metal sleeve and glass tube, and the difference in material refractive index and behavior error between the fiber core and lens etc., the laser beam emitted from the lens is not parallel to the mechanical axis of the metal tube. Therefore, when fiber collimators are used in other optical devices, two matching fiber collimators often require a professional and complex alignment process, which not only restricts the manufacturing efficiency of related optical devices, but also affects the quality of optical devices. One of the reasons for the high...

AI Technical Summary

Problems solved by technology

Therefore, when fiber collimators are used in other optical devices, two matching fiber collimators often require a professional and complex alignment process, which not only restricts the manufacturing efficiency of related optical devices, but also affects the quality of optical devices. One of the reasons for the high cost

However, in some occasions, for example, in fiber optic rotary connectors, matching adjustments cannot be performed between two fiber collimators, which restricts the use of fiber collimators

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