Automatic control system for aligning and coupling optical fiber and electrooptical modulator

Abstract

The invention discloses an automatic control system for aligning and coupling an optical fiber and an electrooptical modulator. The system comprises a tunable laser, an optical power meter, the electrooptical modulator, a polarization-preserving optical fiber, a regulating frame, a step motor controller, a general-purpose interface bus (GPIB) card, a GPIB cable, a serial port communication cable and a computer. The tunable laser is connected with input optical fibers, the optical power meter is respectively connected with the output optical fibers, the electrooptical modulator is arranged among the input optical fibers and the output optical fibers, the input optical fibers and the output optical fibers are fixed on the regulating frame which is connected with the step motor controller, the step motor controller is connected with the GPIB card in the computer through the GPIB cable, and the optical power meter is connected with the computer through the serial port communication cable. The invention solves the problems that the traditional manual regulation of optical fibers has long time and the optical fibers are not aligned easily and cannot be precisely positioned due to the disturbance from external environments.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication and electro-optic modulator, in particular to an automatic control system for aligning and coupling optical fiber and electro-optic modulator. Background technique [0002] The Dense Wavelength Division Multiplexing (DWDM) system has the remarkable characteristics of large transmission capacity and flexible networking, and has become the mainstream technology of long-distance optical fiber communication. As one of the key points of the DWDM system, the electro-optic modulator is used to modulate the continuous light wave (carrier) into an optical signal carrying specific information. Electro-optic modulators can be divided into electro-optic modulators, thermo-optic modulators, acousto-optic modulators, and all-optical modulators according to their modulation principles. The principle of the electro-optic modulator is to change the refractive index of the material under the in...

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Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to solve the problems of traditional manual adjustment of optical fiber, such as time-consuming, difficult alignment, easy disturbance from the outside, and inability to accurately locate, etc., to provide an automatic control system for the alignment coupling of optical fiber and electro-optical modulator

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