3 * 3 single-mode micro-nano optical fiber coupler with controllable and continuously adjustable beam splitting ratio

Abstract

The invention discloses a 3 * 3 single-mode micro-nano optical fiber coupler with a controllable and continuously adjustable beam splitting ratio. The unstretched parts of one ends of three micro-nanooptical fibers are fixed by a first fixing piece, the unstretched parts of the other ends of the three micro-nano optical fibers penetrate through three rotatable fixing pieces and are fixed by one rotatable fixing piece respectively, and the central axes of the three rotatable fixing pieces coincide with one another; when the three micro-nano optical fibers are in a mutually parallel state; thecentral axes of the three rotatable fixing pieces are parallel to the micro-nano optical fibers, and the distances from the fiber cores of the three micro-nano optical fibers to the central axes of the rotatable fixing pieces are different from one another, so that when any one rotatable fixing piece is rotated, only the micro-nano optical fiber fixed by the rotatable fixing piece is driven to twist; when the three micro-nano optical fibers are in a parallel state and a coupler is in a working state, the intersection point of the extension lines of the central axes of the three rotatable fixing pieces and the first fixing piece is not changed all the time. The method for controlling the beam splitting ratio is diverse and continuously adjustable, and is flexible and diverse in application.

Description

technical field [0001] The invention relates to a single-mode fiber coupler, in particular to a 3×3 single-mode fiber coupler, which can be applied in the fields of optical communication, optical signal processing, sensing systems and the like. Background technique [0002] As a key component in an optical network system, a single-mode fiber coupler can split optical signals from one optical fiber to two (or multiple) optical fibers or combine optical signals on two (or multiple) optical fibers. Passive transmission optics onto an optical fiber. Among them, the 3×3 single-mode fiber coupler is the most basic type of single-mode fiber coupler, since the 3×3 single-mode fiber coupler has one more coupling arm than the 2×2 coupler, therefore, in the use of functions and It is more superior in signal processing and can be applied to couplers, optical switches, optical buffers, optical resonators, etc. with adjustable splitting ratio. The performance of the 3×3 single-mode fibe...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a 3×3 single-mode micro-nano fiber coupler with controllable beam splitting ratio and continuous adjustment to overcome the inadequacy of the existing technology in the same coupling Controllable and continuously adjustable multiple beam splitting ratios in the device

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