Fiber optic structures are fundamental media transmission structure for general broadband frameworks. This paper gives a diagram of late improvements influencing in-vehicle optical systems. Unmistakable light sources are presently being utilized as a part of this field, acquiring focal points both perceivability and workability. Specifically, current patterns and subjects influencing the key gadgets utilized as a part of these systems, for example, noticeable light sources, optical strands, optical circuits and handset modules, are clarified. We consider that the utilization of a wavelength division multiplexing (WDM) innovation is promising for acknowledging further advances in rapid interchanges. We will quickly present the optical gadgets for WDM that have been created in our examination gathering.