FEBRUARY 26, 2008 -- At OFC 2008 in San Diego, CA, NeoPhotonics (search for NeoPhotonics) will debut a new high-power tunable laser (search for tunable laser) for DWDM networks that has an output power of 40 mW and other features used in DQPSK coding and 40-Gbit/sec systems.
At 40-mW optical output power, the NTL2040 laser can transmit at twice the output power of a standard integrated tunable laser assembly (ITLA). Special coding used in some 40-Gbit/sec transmission requires higher optical power to overcome higher loss from additional optical components. In addition, 40-Gbit/sec systems are much more sensitive to dispersion than 10-Gbit/sec systems and require narrower linewidths and higher side mode suppression ratios (SMSR).
The external cavity design and output power of the laser results in a narrow linewidth, low noise, high SMSR, and high power. According to the company, the laser can also 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.
The NTL2000 series uses a continuous-wave external cavity laser that delivers high spectral purity with low RIN, low SMSR, and narrow linewidth. The output power is adjustable with standard outputs of 10, 20, and 40 mW. It is suitable for most DWDM applications, including metro, long-haul, and ultralong-haul, and has data rates from 2.5G to 40G. The laser has fast wavelength tuning to meet the standards for SONET/SDH and DWDM protection switching, dynamically reconfigurable networks, and remote provisioning and testing.