SAN JOSE, Calif., April 4 -- Bookham Inc., a provider of optical components, modules and subsystems, announced it has entered into an agreement with Nortel Networks Corp. to amend the current supply agreement and secured loan notes between the two companies. As part of the agreement, Bookham said it expects to receive orders from Nortel Networks for shipment, over the next 12 months, of approximately $50 million worth of products that Bookham is discontinuing as part of its transfer of product assembly production to Shenzhen, China. 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