IPG Photonics Corp., an Oxford, Mass.-based maker of fiber lasers and amplifiers, priced nine million common shares at $16.50 per share ($13.50-$15.50 forecast), for an IPO take of approximately $148.5 million. It will trade on the Nasdaq under ticker symbol IPGP, while Merrill Lynch and Lehman Brothers served as co-lead underwriters. Private equity backers include TA Associates, Merrill Lynch, Apax Partners, Winston Partners, Robertson Stephens and Marconi Ventures. www.ipgphotonics.com Ă‚Â < ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />