FREMONT, Calif., May 2 -- Atoga Systems Inc., a provider of intelligent wavelength division multiplexing solutions using tunable lasers, announced it has secured more than $50 million in equity and debt financing from financial and strategic investors. The new funding will enable the company to enhance product development activities, boost sales and marketing operations, broaden customer service and support capabilities, ramp up manufacturing and expand into international markets. The lead investors on Atoga's equity financing are Silicon Valley Internet Capital, which provides capital and operating support for Internet infrastructure companies and Institutional Venture Partners, a fund that focuses on expansion-stage venture capital. New Enterprise Associates and Sequoia Capital, Atoga's two original investors, confirmed their continuing support with significant participation in this round of financing.