In this paper, we propose a novel segment-shared protection algorithm (SSPA) for multi-domain optical mesh
networks. In SSPA, intra-domain links and inter-domain links are protected with segment-backup paths respectively.
The segment-working path is protected with path shared protection in single-domain and the inter-domain link is
protected with shared segment-backup path that it could traverse several domains. The major advantage of SSPA is
its shorter recovery time than previous path protection in multi-domain optical mesh networks. The SSPA resolves
the inter-domain link protection problem successfully. The computer simulation results show that resources
utilization ratio of our proposed SSPA is near to the optimization algorithm that requires the global knowledge of