Abstract: A self-propelled residual film recycling integrated machine is provided, which includes a straw crushing device, a picking and impurity cleaning device, a cab, an air intake system, a film removing and conveying device, a round bale baler, a suspension system, a traveling chassis, and a film unloading bracket. The straw crushing device is assembled at a front end of the traveling chassis in a three-point suspension mode, the picking and impurity cleaning device is installed at a belly of the traveling chassis, and the film removing and conveying device is installed diagonally upwards and backwards of the picking and impurity cleaning device. The round bale baler is installed at a tail of the traveling chassis and is behind the film removing and conveying device, the film unloading bracket is installed below the round bale baler, and the suspension system is arranged on the traveling chassis.

Abstract: Provided is a few-mode optical fiber. The optical fiber includes: a core and a cladding enclosing the core. The cladding includes: a first inner cladding surrounding the core; a first high-refractive-index mode filter layer surrounding the first inner cladding; a second inner cladding surrounding the first high-refractive-index mode filter layer; a second high-refractive-index mode filter layer surrounding the second inner cladding; and an outer cladding surrounding the second high-refractive-index mode filter layer.