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

Abstract

The invention discloses a power adjustable, approximate-Gaussian spectrum and erbium doped super-fluorescent fiber source. The tail fiber of a pumping source (1) with 980nm wavelength is welded with the input fiber at the A terminal of a first wavelength division multiplexer (2) with 980nm or 1550nm wavelength; the tail fiber at the B terminal of the first wavelength division multiplexer (2) with 980nm or 1550nm wavelength is welded with one end of the section A erbium doped optical fiber (3); the other end of the section A erbium doped optical fiber (3) is welded with input fiber at the A terminal of a second wavelength division multiplexer (4) with 980nm or 1550nm wavelength; the tail fiber at the D terminal of the second wavelength division multiplexer (4) with 980nm or 1550nm wavelength is welded with the tail fiber of a faraday rotation mirror (5); the tail fiber at the C terminal of the first wavelength division multiplexer (2) with 980nm or 1550nm wavelength is welded with one end of the section B erbium doped optical fiber (6); the other end of the section B erbium doped optical fiber (6) is welded with input fiber of an isolator(7). The invention applies a double pass backward configuration, which makes the output power of the erbium doped super-fluorescent fiber source more than 3mW; and the erbium doped super-fluorescent fiber source is a power adjustable optical fiber source with the average wavelength near 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

Images