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10Gbps pluggable transceiver tunes into DWDM band

Posted: 25 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:10Gbps pluggable transceiver? optical communications networks?

Mitsubishi Electric Corp. says it has developed the world's first compact and pluggable 10Gbps optical communications transceiver, dubbed the MF-10KWXF series, capable of discretionary tuning of all C Band Dense Wavelength Division Multiplexing (DWDM). The transceiver complies with the 10Gbps form-factor industrial standard, XFP-E (Extended) Multi-Source Agreement (MSA) 3.

With increased Internet traffic in recent years, service providers have been rushing to expand transmission volume of optical communications networks. There is an increasing demand for a DWDM system that can handle 64 or 128 wavelengths in a single optical fiber. The need for a tunable optical interface to operate this using pluggable transceiver is increasing.

To address these needs, Mitsubishi Electric has developed the MF-10KWXF 10Gbps transceiver with multirate operation from 9.95Gbps to 11.1Gbps for SONET/ SDH4 and 10GbE.

The chip is tunable within full C band DWDM Optical Interface ITU-T 50GHz grid. It touts zero chirp and negative chirp, and comes with Hot Pluggable features.

With dimensions of 78mm x 48mm x 12.6mm, the MF-10KWXF series offers an external signal interface of XFI (XFP MSA 4.5 Compliant) and has a management interface compliant with I?C rev. 2 and XFP MSA.

Low power consumption is rated at 7W (maximum) and operating temperature ranges from -5C to 70C.

Key features
According to the company, the MF-10KWXF series is the first hot swappable optical transceiver that can be set to any C Band DWDM grid frequency at the users discretion by mounting an optical tunable laser with a low power consuming semiconductor modulator to the transceiver. The MF-10KWXF series is also 50 percent smaller and uses 40 percent less energy compared to previous models.

Previous tunable DWDM 10Gbps transceivers were unable to hot swap because they were connected to the substrate with a 300-pin electric connector. This meant that users had to physically remove and insert optical transceiver motherboards and optical interface maintenance was necessary, which made integrating multiple ports on one board impossible. The MF-10KWXF series is pluggable for multiple ports by edge connecting using XFI compliant electric connection conditions.

The chip also achieves reduced maintenance by 50 percent and lowered power consumption by 40 percent to under 7W by using the low power consuming XFI CDR IC and using a tunable optical laser module that replaces the LiNB modulator with a power saving semiconductor modulator. It also reduces the occupied substrate surface area by 70 percent compared to models using a 300-pin transponder by using XFI edge connecting and receptacle design. Combining this with multiple porting will greatly improve mounting density.

By complying with XFP-E MSA and maintenance design using XFI interface, the transceiver can be used with no changes to the user board even when future XFP frequency tuner DWDM optical communications transceivers are developed.

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