Does arbitrum use Optimism?

Does Arbitrum Utilize the Optimism Technology? I'm quite interested in understanding the technological landscape of blockchain and cryptocurrencies. Could you please clarify whether Arbitrum incorporates the Optimism technology in its operations? If so, how does it integrate it, and what benefits does it derive from this integration? Alternatively, if Arbitrum doesn't use Optimism, could you explain why? I'm eager to learn more about the intricacies of these two platforms and how they might interact or differ in the crypto ecosystem. Thank you for shedding light on this topic.