With the development of optical transmission technology, optical fiber networks have become critical infrastructures in supporting information transmission on the Internet. However, the fiber cable is very vulnerable to la. With the development of optical transmission technology, optical fiber networks have become critical infrastructures in supporting information transmission on the Internet. However, the fiber cable is very vulnerable to large-scale damage such as earthquakes or pulse bombs. What is more serious is that it will take a long time to locate and repair the damages on fiber links. The long-term repair process will cause continuous network performance degradation and severe economic loss. The fact is that these dangerous areas may be ignored by traditional vulnerability analysis models. To solve this problem, this paper proposes a method to analyze the vulnerability of fiber networks based on network recoverability. We first improve the traditional fiber network simulation methods and damag. ••Developed a vulnerability analysis model based on fiber network recoverability.••Designed multiple vulnerability analysis metrics considering network repair.••Two case studies are used to examine the practicability of the proposed model.••Real case study shows recoverability significantly affects vulnerability analysis.Optical fiber networkLarge-scale damageDamage measurementRecoverabilityWith the development of computer technology and communication technology, the way of information transmission has changed dramatically. Optical cable has quickly replaced the traditional copper cable, becoming the core facility of the communication backbone network. Compared with traditional fixed communication materials, optical fiber has the following advantages: reliable transmission technology of wide frequency band, large capacity, and low loss of transmission, as well as the commercial value of low cost, small weight and long service life. In China, the total length of cable lines has reached 45.46 million kilometers as of June 2019. Submarine optical cables around the world have accumulated more than 1.4 million kilometers and carry 98% of the bandwidt. 2.1. Related research on fiber network recoverabilityMany researches on the recoverability of fiber networks focus on the discussion of repair strategies, such as progressive network recovery strategies under resource-constrained conditions,,. These studies first assume that network repair resources are relatively scarce, and only part of the repair can be completed within the required time. Therefore, heuristic algorithms need to be designed according to different priority requirements (critical link first, key node first, or key business flow first). Some studies pay more attention to how to effectively formulate network repair strategies under uncertain damage scenarios. Some researches focus o.
