This laser is a dense wavelength division multiplexing (DWDM) laser for analog modulation applications. It uses a distributed feedback (DFB) design based on a proprietary epitaxy and structure to eliminate relaxation oscillations for high performance analog applications. The laser’s excellent linearity and operating characteristics minimizes degradation of the transmitted RF signals. It is hermetically sealed in a standard 14 pin butterfly package with an internal thermo-electric cooler (TEC), and photodiode for power monitoring. The laser is available at customer-selected ITU wavelengths for DWDM.