Tunable laser refers to a special kind of laser whose wavelength of operation is capable of being transformed in an organized method. Such lasers allow constant tuning over a significant wavelength range while other laser types allow small shifts in output wavelength. Such lasers have the ability to remotely provide required wavelength and deploy all-optical layers. Also, the criteria for switching are inherent in the wavelength of tunable lasers itself while fixed-wavelength lasers depend on an intellectual network to switch their signals to termination. Tunable lasers simplify the addition or deletion of bandwidth by remotely controlling the system, thereby, supporting diverse on-demand services. The tunable lasers market is expected to benefit from broadband communication industry trends. The need to have more proficient networks that are high speed and agile is paving way for research & development of better laser technologies. Widely tunable lasers help maximize existing ne...