News

7 January 2009

 

Civcom adds RZ tunable 12.5G transponder to Free-Light range

Optoelectronic component, module and subsystem maker Civcom of Petach Tikva, Israel has announced the availability of a new 12.5Gb/s return-to-zero (RZ) tunable transponder.

Complementing Civcom’s Free-Light family of 300-pin MSA (multi-source agreement) widely tunable 10Gb/s non-return-to-zero (NRZ) transponders, the new RZ transponder offers equipment manufacturers high performance for long-haul terrestrial and submarine applications, the firm says.

Designed specifically to work with 25% forward error correction (FEC) for long-reach dense wavelength division multiplexing (DWDM) applications, the RZ transponder contains both a 10Gb/s widely tunable transmitter (using a widely tunable laser covering the entire C-band) and a wide-band receiver. The module is compatible with the 300-pin MSA and I2C standard.

“Our newly launched RZ tunable 12.5G transponder is built specifically to address the challenging demands of ultra-long-haul terrestrial and submarine applications,” says VP of sales & marketing Yair Itzhar. “Using this transponder, carriers can achieve stable transmission performance with low optical signal-to-noise ratio (OSNR) over virtually unlimited distances,” he claims.

Although the RZ modulation format is less commonly deployed than its NRZ counterpart, RZ offers advantages in signal quality and non-linear effect handling (improving OSNR by up to 2dB in a simple receiver implementation). In long-haul and ultra-long-haul communications, for example, RZ is much more effective due to its high tolerance of non-linear distortions of the self phase modulation (SPM) type.

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