Power-adjustable near-Gaussian spectrum erbium-doped super-fluorescent optical fiber source

Abstract

The invention discloses a power-adjustable near-Gaussian spectrum erbium-doped superfluorescent optical fiber light source, the tail fiber of a pump light source (1) with a wavelength of 980nm and a first wavelength division multiplexer (2) with a wavelength of 980nm / 1550nm The A end of the fiber is welded into the fiber, and the wavelength is 980nm / 1550nm. The other end is fused with the A-end fiber entry of the second wavelength division multiplexer (4) with a wavelength of 980nm / 1550nm, and the D-end pigtail of the second wavelength division multiplexer (4) with a wavelength of 980nm / 1550nm is connected to the Faraday rotator The pigtail of mirror (5) is welded, the wavelength is the C-end pigtail of the first wavelength division multiplexer (2) of 980nm / 1550nm and one end of B section erbium-doped optical fiber (6) is fused, and B section erbium-doped optical fiber (6) ) is welded with the fiber entry of the isolator (7). The invention adopts a double-pass backward structure, so that the output power of the erbium-doped superfluorescent fiber light source is greater than 3mW, and it is a fiber light source capable of adjusting the power around the average wavelength of 1560nm.

Description

technical field [0001] The invention relates to an optical fiber light source, more particularly, to a near-Gaussian spectrum erbium-doped superfluorescent optical fiber light source with adjustable power. Background technique [0002] Incoherent broadband light sources have very important applications, such as EDFA measurement, fiber grating development, spectral testing, optical fiber sensing, signal processing, wavelength division multiplexing networks, optical fiber communications, and low-cost access networks. Compared with low-coherence superluminescent light-emitting diodes, broadband light sources based on rare earth-doped erbium fiber amplified spontaneous emission (Amplifiedspontaneous emission, ASE) have inherent extremely wide emission spectrum, high output power, and are easy to couple and use with fiber optic systems. Long lifetime and other advantages make it the best choice for making low-coherence broadband light sources, and has been extensively studied in ...

AI Technical Summary

Problems solved by technology

The light source with double-pass structure can get higher output power, better wavelength stability and larger bandwidth, but in order to get broadband flat output, complex filters need to be designed

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