A soon-to-be-tested tunable Dense Wavelength Division Multiplexing (DWDM) pluggable transceiver module from Calif.-based Optics and laser maker Oclaro Inc. uses 4x28G wavelengths to deliver a 2.5 times improvement in spectral efficiency compared with competing 10G solutions, the company claims.

Making its debut at next week’s OFC/NFOEC show, the module provides not only “the performance boost customers need in spectral efficiency, but also meets the low cost and power consumption requirements of these applications,” Oclero adds.

The device is based on a direct-detection ODB (Optical Duobinary) modulation format that works with Oclaro’s line of 100G coherent transponder solutions. According to Oclero, it’s the industry’s first tunable 100G DWDM CFP transceiver and an alternative to coherent 168-pin MSA transponders to address less-demanding, shorter-reach applications.

The module is available as a grid-tunable solution and as a fully tunable solution. Oclaro is also planning to offer MLSE (maximum likelihood sequence estimation) on the receiver as a configuration option to enhance the performance of the module by extending CD tolerance and widening the input range of the receiver. It also incorporates key technologies from Oclaro’s existing product lines, including the ILMZ (Integrated Laser Mach Zehnder) used in the T-XFP products.

Samples will be available to key customers in mid-2012, with a production launch scheduled for later this year.

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