1.7[Mu]m-waveband tunable thulium and terbium-doped multi-wavelength fiber laser

Abstract

The invention discloses a 1.7[Mu]m-waveband tunable thulium and terbium-doped multi-wavelength fiber laser, which belongs to the field of lasers and aims at the problems of complexity in assembling, poor environment stability and poor practicality in the prior art. A tunable light source, an erbium-doped fiber amplifier and the port a of a first fiber coupler are successively in fiber connection; the port c of the first fiber coupler, the port d and the port g of the second fiber coupler, the port h of the third fiber coupler, the port j of the third fiber coupler and the port k of the fourth fiber coupler are successively in fiber connection; the port e of the second fiber coupler, a thulium-doped fiber, a terbium-doped fiber and the port f of the second fiber coupler are successively in fiber connection; the port i of the third fiber coupler and the port m of the fourth fiber coupler are in fiber connection; the port n of the fourth fiber coupler, a first polarization controller, the port o of fiber isolator, the port p of the fiber isolator, a second polarization controller and the port b of the first fiber coupler are successively in fiber connection; and the port l of the fourth fiber coupler is taken as laser output.

Description

technical field [0001] The invention relates to a biological special band multi-wavelength laser, in particular to a 1.7 μm multi-wavelength laser, which belongs to the technical field of lasers and is applied to the field of biomedical light sources. Background technique [0002] Optical coherence tomography (OCT) is a non-destructive optical imaging method that can provide real-time one-dimensional depth, two-dimensional cross-sectional and three-dimensional body images, with a resolution of microns and an imaging depth of millimeters. According to the characteristics of OCT, it is widely used in the biomedical field, including eye detection that requires clear three-dimensional retinal images, heart lesion detection, early tumor diagnosis, dental inspection, skin detection, etc. OCT technology is also increasingly used in non-medical applications, such as identification and protection of artworks, industrial metrology, etc. [0003] OCT systems for retinal imaging are ba...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of complex assembly, poor environmental stability and poor practicability of the existing 1.7 μm band fiber laser, the present invention proposes a 1.7 μm band tunable thulium-doped terbium multi-wavelength fiber laser

Images