Efficient circulating filling-in clad pumping optical fiber amplifier

Abstract

A high-effective cycling injecting envelope pump fiber amplifier, including: the inputting end separator 4, the series connection standard monofilm fiber 10, the double envelopes fiber 1, the series connection standard monofilm fiber 10, and the outputting end separator 5, the characteristic is: uses the multimode / monofilm mixing WDN parts that consists of the monofilm single-core collimator, the medium filter slice and the multimode / monofilm mixing double-core collimator, and 2*1 multimode fiber combiner 14 to be the cycling injecting structure, the high reflectivity filter slice makes the sparing pump luminous energy to enter the cycling road, improves the pump efficiency of the envelope pump fiber amplifier, and reduces the cost.

Description

technical field [0001] The invention relates to a cladding-pumped optical fiber amplifier, in particular to a cladding-pumped optical fiber amplifier adopting a WDM device and a multimode optical fiber multiplexer circulation pumping structure. Background technique [0002] The newly developed high-power optical fiber amplifier generally adopts multi-mode double-cladding pumping technology. The main advantages of cladding-pumping optical fiber amplifier are as follows: 1) Compared with single-mode fiber core pumping technology, multi-mode cladding pumping technology has The obvious advantage of using multi-mode cladding pumping technology is that the pump light is input into a multi-mode double-clad fiber whose cross-section is hundreds to thousands of times that of a single-mode fiber. Therefore, the same input optical density , multi-mode cladding pumping can allow hundreds to thousands of times the input of single-mode pumping, which makes it easy to achieve high-power or...

AI Technical Summary

Problems solved by technology

However, due to the special structure of the single-mode and multimode multimode fiber combiner (see Figure 1.2), part of the pump light will inevitably be taken away in the cladding of the fiber used to output signal light; in addition, the multimode The optical loss of the optical fiber combiner in the reverse transmission is significantly higher than that in the forward direction, so this method can only collect part of the remaining pumped light, and the loss of the remaining pumped light is relatively large; on the other hand, adding such a fiber coupler is undoubtedly It increases the difficulty of production and the overall cost, which is actually not advisable for optical amplifiers

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