Broadband high-speed sweep frequency light source

Abstract

The invention relates to the technical field of a fiber laser and specifically relates to a broadband high-speed sweep frequency light source. The sweep frequency light source comprises a broadband high-speed sweep frequency light source input circuit and a broadband high-speed sweep frequency light source output circuit, which are formed by a quantum well semiconductor optical amplifier QW-SOA1,a quantum dot semiconductor optical amplifier QD-SOA, an optical coupler 3, a fiber polarization controller 2, a two-stage isolator 2, an optical fiber F-P tunable filter, an optical circulator, a single-mode fiber, a Faraday rotation mirror, an optical coupler 1, a two-stage isolator 1, a fiber polarization controller 1 and an optical coupler 2. The system connects the quantum well semiconductoroptical amplifier QW-SOA1 and the quantum dot semiconductor optical amplifier QD-SOA in parallel through the coupler, thereby broadening the sweeping range of the sweep frequency light source; and through combination of the FDML technology, the sweep frequency light source has the advantages of high speed, narrow line width and high phase stability and achieves a broadband high-speed purpose.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a broadband high-speed frequency-sweeping light source. Background technique [0002] Optical coherence tomography (Optical Coherence Tomography, OCT) is a high-resolution biomedical imaging method, which can realize real-time, high-resolution, and three-dimensional imaging of the internal microstructure of biological tissues. a wide range of applications. In recent years, thanks to the development of light source and detection technology, Fourier domain OCT has become the mainstream mode of OCT, especially promoting the development of functional imaging technologies such as OCT microangiography. [0003] Swept source optical coherence tomography (SS-OCT) is the latest generation technology, which combines the advantages of single-point detection of time-domain OCT system and high-speed imaging capability of spectral domain OCT system. However, the swept source is a key co...

AI Technical Summary

Problems solved by technology

Its characteristic is that it can increase the sweeping rate of the sweeping light source by adjusting the duty cycle, but it cannot guarantee that all colors of light resonate in the resonant cavity at the same time, and there is a contradiction between the instantaneous line width and the tuning speed

[0007] At present, the research on frequency-sweeping light sources has the problems of narrow frequency-sweeping range and low-frequency-sweeping speed, which need to be solved urgently

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