A multi-channel optical path correlator with adjustable cavity length

Abstract

The invention belongs to the field of optical fiber technology, and specifically relates to a multi-path optical path correlator with adjustable resonant cavity length that can be used in a demodulation system of multiplexed optical fiber white light interference sensor array. The present invention connects an optical resonant cavity to the optical fiber optical path through a coupler, adjusts the length of the resonant cavity and passes through multiple round trips of the optical path, and consists of an optical path adjustable optical resonant cavity, a fiber optic coupler, and a three-port or four-port optical fiber ring The optical resonant cavity oscillates back and forth to generate adjustable multi-channel optical path difference signals; the coupler outputs the optical signal containing multiple optical path differences; the three-port circulator controls the direction of the optical signal, and passes through the optical fiber The connection of the light path of the white light interference system. The multi-path optical path correlator provided by the present invention realizes the optical path matching of multiple optical paths, enhances the demodulation ability of the sensing system, simplifies the optical path structure of the optical system, reduces the cost of the system, and improves the stability of the system and reliability.

Description

technical field

[0001] The invention belongs to the field of optical fiber technology, and specifically relates to a multi-path optical path correlator with adjustable resonant cavity length that can be used in a demodulation system of multiplexed optical fiber white light interference sensor array. Background technique

[0002] Optical fiber white light interference technology and method is a unique measurement method and sensing technology in the field of optical fiber technology. This specialized technology is used in the study of wide-spectrum optical interference characteristics, absolute deformation optical fiber sensing measurement, the structure of optical waveguide devices and the detection of light wave reflection characteristic parameters, and the measurement and evaluation of optical polarization state transverse coupling in fiber optic gyroscope rings, especially in It is widely used in the aspects of optical tomography of tissue structure and morphology in medi...

Examples

Embodiment Construction

[0035] The present invention will be described in more detail below in conjunction with the embodiments given by the accompanying drawings.

[0036] The present invention connects an optical resonant cavity to the optical fiber optical path through a coupler, adjusts the length of the resonant cavity and passes through multiple round trips of the optical path, so that the coupler can output different optical paths each time, thereby realizing multi-channel optical path relevant. This multi-channel optical path correlator with adjustable optical path is composed of an optical path adjustable resonant optical cavity, a fiber coupler, and a three-port or four-port optical fiber circulator. Its function is (1) to generate adjustable multi-path optical path difference signals by the reciprocating oscillation of the optical resonant cavity with adjustable cavity length; (2) to output the optical signals containing multi-path optical path differences by the coupler; (3) The directio...

technical field

[0001] The invention belongs to the field of optical fiber technology, and specifically relates to a multi-path optical path correlator with adjustable resonant cavity length that can be used in a demodulation system of multiplexed optical fiber white light interference sensor array. Background technique

[0002] Optical fiber white light interference technology and method is a unique measurement method and sensing technology in the field of optical fiber technology. This specialized technology is used in the study of wide-spectrum optical interference characteristics, absolute deformation optical fiber sensing measurement, the structure of optical waveguide devices and the detection of light wave reflection characteristic parameters, and the measurement and evaluation of optical polarization state transverse coupling in fiber optic gyroscope rings, especially in It is widely used in the aspects of optical tomography of tissue structure and morphology in medi...

Examples

Embodiment Construction

[0035] The present invention will be described in more detail below in conjunction with the embodiments given by the accompanying drawings.

[0036] The present invention connects an optical resonant cavity to the optical fiber optical path through a coupler, adjusts the length of the resonant cavity and passes through multiple round trips of the optical path, so that the coupler can output different optical paths each time, thereby realizing multi-channel optical path relevant. This multi-channel optical path correlator with adjustable optical path is composed of an optical path adjustable resonant optical cavity, a fiber coupler, and a three-port or four-port optical fiber circulator. Its function is (1) to generate adjustable multi-path optical path difference signals by the reciprocating oscillation of the optical resonant cavity with adjustable cavity length; (2) to output the optical signals containing multi-path optical path differences by the coupler; (3) The directio...

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