Can you bridge from arbitrum to Optimism?

Can you please clarify if it's possible to bridge assets from the Arbitrum blockchain to the Optimism blockchain? I understand that both are popular Ethereum Layer 2 scaling solutions, but I'm unsure if there's a direct bridge or a process to move assets between the two networks. Is there a protocol or service that enables this kind of cross-chain interoperability? If so, could you provide some details on how it works and any potential risks or limitations associated with the process?