A One-Dimensional Tunable Beam Direction Control Method Based on Fluid Optical Waveguide

Abstract

The invention relates to a one-dimensional tunable light beam direction regulation and control method based on a fluid optical waveguide. A fluid microlens used in light beam direction regulation and control comprises the fluid optical waveguide, an incident laser, a light beam reception surface and flow-out fluid containers. A channel for carrying microfluid is formed in the fluid optical waveguide, and comprises a core layer fluid inlet, two symmetrical wrapping layer fluid inlets, a fluid micro-cavity and two symmetrical fluid outlets, the core layer fluid inlet and the wrapping layer fluid inlets are communicated with the inlet side of the fluid micro-cavity, the outlet side of the fluid micro-cavity is connected with the two fluid outlets, and the fluid outlets are communicated with the flow-out fluid containers. The incident laser is arranged coaxial with the light beam reception surface, and the axes of the incident laser and the light beam reception surface are parallel with the flowing direction of fluid and are both along the central axis of the micro-cavity. According to the regulation and control method, the flow velocity of the fluid of two wrapping layers is adjusted to realize one-dimensional offset of the central refractive index. The method can realize dynamic tuning, the integrated level is high, the structure is simple, manufacture is convenient and the cost is low.

Description

technical field [0001] The invention relates to the technical field of beam shaping, in particular to a method for controlling the direction of a tunable beam. Background technique [0002] The beam shaping technology includes focusing, collimation, deflection, beam splitting, coupling, etc. of the beam. Usually, adjusting the refractive index distribution of the optical medium can easily realize the focusing, collimation, deflection, beam splitting, etc. of the incident beam. control. The rapid development of microfluidic optical technology in recent years has provided us with a new method of beam shaping. The principle is to control the microscopic scale of light by controlling the fluid flow (Mao X, Lin SS, Lapsley MI, Shi J, Juluri BK , Tunableliquid gradient refractive index (L-GRIN) lens with two degrees of freedom, Lab.Chip.,9(2009):2050-2058, Tunable liquid gradient refractive index lens with two degrees of freedom adjustment capability, Lab on a Chip , 9(2009):205...

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