The Design And Fabrication Of A Slot-DBR Laser Based On Deep-Submicron Slots

As the power of the internet explodes with time, the internet has becoming an essential part of the society, both economically and socially. With this, the demand to lower the unit price for communication bandwidth and increase of bandwidth itself has been met by the rising of the cost rise of traditional communication material, such as cupper. At this point, the widely application of optical communication network has provided a excellent opportunity to solve this problem.With communication bandwidth booming, the mainstream of optical communication network is in the process of upgrading, from CWDM, Coarse Wavelength Division Multiplexer, to DWDM, Dense Wavelength Division. This upgrading allows optical network to fully utilize the fiber cables that’s already been laid, and multiplying communication bandwidth without implementing more fiber cables to the system. However, this also pose a problem for optical sources. Semi-Conductor Laser Diodes, or LDs, with its low production cost and mass production capability, is becoming the fundamental light source in communication system.Traditional tunable LDs include DFB Laser, DBR Laser, SG-DBR and so on. Among these, DBR laser, shows high performance with a relatively high production costs.To solve the dilemma, this project propose to use deep-submicron slots as distributed reflectors for DBR lasers. Thus lowering the production of the laser while keeping its original high performance. The fabrication method as well as test data is included in this paper.