NeoPhotonics introduced a new high power tunable laser for DWDM (dense wavelength division multiplexing) networks that has an output power of 40 mW and other features ideal for DQPSK coding and 40 Gbps systems. The 40 mW rating is twice the output power of a standard ITLA, Special coding used in some 40 Gbps transmission requires higher optical power to overcome higher loss from additional optical components. In addition, 40 Gbps systems are much more sensitive to dispersion than 10 Gbps systems and require narrower linewidths and higher Side Mode Suppression Ratios (SMSR).
NeoPhotonics said the external cavity design and output power of its new NTL 2040 laser results in a narrow linewidth, low noise, high SMSR and high 40 mW power. The NTL2040 laser can address all commonly used wavelengths in DWDM systems in the C, C+, L and XL bands, with channel spacing based on the “ITU-T” specified 50 GHz grid. Thus, one NTL2000 series tunable laser can replace any of 120 single wavelength lasers in the C+ or XL bands.http://www.neophotonics.com
