VCSEL Spatial Effects [Optical System]

[Damian Marek]

Question:

I am interested in modelling the spatial effects of a VCSEL system. Specifically, I would like to see the excitation of multiple modes in a multimode fiber due to the beam broadening from propagation in free space. How can OptiSystem model these effects?

[Damian Marek]

Answer:

I have attached an example of a single mode VCSEL exciting multiple modes in a Measured-Index Multimode Fiber. The Gaussian beam at the output of the VCSEL first propagates through 300 μm of free space and is then coupled to a multimode fiber. The spreading of the beam causes multiple modes to be excited, which can be observed at the Spatial Visualizer_7 by changing the Mode number. After more free space propagation the signal is recovered and the BER is calculated.

[Author]

Posts