Over the last two decades, AWGs have been a key filtering technology used in Dense Wavelength Division Multiplexing (DWDM) systems to put different wavelength channels on to and off of transmission fibers. An AWG offers much lower cost and many more channels compared to a wavelength-selective switch, and is an ideal wavelength multiplexing and de-multiplexing technology for point-to-point high capacity systems such as Data Center Interconnect (DCI).
The advent of coherent transmission for telecommunications greatly increases fiber capacity and is particularly useful for DCI applications. However, it imposes a new set of requirements on AWGs that are quite different from those in traditional direct detection systems. By using higher baud rates and higher order modulation coherent transmission the bandwidth of each wavelength channel can be increased to 400 Gbps, 600 Gbps, 800Gbps or higher. However, these channels require more spectral bandwidth, thus reducing the total number of channels achievable when the total available optical spectrum is fixed.
Consequently, an optimum design of the DWDM multiplexer and de-multiplexer channel spacing and filter bandwidth is needed to maximize the fiber capacity. As a vertically integrated designer and manufacturer of AWGs,
"We are pleased to announce initial shipments of our new line of AWGs designed to support our customers' high baud rate DCI and Telecom coherent transmission systems," said Tim Jenks, Chairman and CEO of NeoPhotonics. "As an industry leading designer and vertically integrated manufacturer we have been able to respond rapidly to different customer needs and to efficiently meet this emerging market demand," concluded Mr. Jenks.
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