Inital Design Investigation for 1310 nm VECSEL and Compensating Spatial Walkoff using Phase Shifted Astigmatic Mode Converter
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PublisherThe University of Arizona.
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AbstractA high-power 1310 nm VECSEL with orbital angular momentum would be very beneficial to optical communications because it would allow for orbital angular momentum to be used as a multiplexing technique, drastically increasing the bandwidth of optical communications. Two main initial design parameters were investigated for the design of such a laser; material of the quantum well structure and thermal management techniques, along with other secondary design parameters. An initial assessment of the best option was given along with secondary choices depending on the circumstances. A Live ABCD Matrix Beam profile simulation program in Matlab was discussed, including the theory, how the code was made, and the inputs and outputs of this program. This program was specifically designed for the V cavity VECSEL and thus can also be used for the high-power 1310 nm VECSEL with orbital angular momentum. It can be used to have instant feedback and an increased ability to troubleshoot any issues or constraints that present themselves moving forward during the design and creation process for this VECSEL. Finally, there was an investigation into the simulation of an astigmatic mode converter at an angle to analyze whether or not this would be able to compensate for spatial walk-off. The theory of an Astigmatic Mode Converter and how to code one is investigated. Once the creation of the code had been explained, the spatial walk-off was input into the simulated beam. Lastly, the AMC's angle was incrementally changed, and results were analyzed to determine the effect on distortion.
Degree ProgramGraduate College