The NLLD series directly modulated external cavity laser is cost effective solution for 2.5 Gbits/s digital transmission in SMF-28 fiber. This is fabricated in a hermetically sealed 14-pin butterfly package that contains thermoelectric cooler (TEC), thermistor, monitor photodiode, optical isolator. The NLLD provides substantially lower dispersion penalty and lower chirp than a directly modulated DFB. The wavelength stability is assured by design, eliminating the need for wavelength lockers and complex feedback control circuits. Features: ITU wavelengths across C-band 100 GHz channel spacing SONET/SDH OC-48/STM16 ring and meshed applications Low dispersion provides Low transient chirp provides unique narrow dynamic spectrum Excellent long-term wavelength st ability eliminates the need for a wavelength locker Application: Metro and Long Haul DWDM,100 GHz spaced networks SONET/SDH OC-48/STM16 ring and meshed applications Drop-side of DWDM long-haul transport equipment Optical Test and Instrumentation Microwave Photonics CATV networks Sensors