Enhanced Photonic Integrated Circuits (PIC) are required for the current demand of flexibility and reconfigurability in telecommunications networks. However, the technical and functional requirements of the PIC demand a thorough characterization and testing to provide an accurate prediction of the PIC performance. In the characterization and testing context, the use of Spatial Light Modulator (SLM) can be beneficial. SLM is a diffractive device to reconstruct images from Computer Generated Holograms (CGH) that allows to modulate the wavefront of a light beam. This capability can be explored to feed/receive optical signals to the PIC, i.e., as a flexible SLM based coupling platform. The feasibility of this approach was tested with the generation of a multiplexing/demultiplexing CGH to be applied into an optical chip for data compression based on Haar wavelet transform. Simulation results for building blocks as well as the all-optical network for the optical data compression chip are presented, supporting their theoretical feasibility. A new concept to use a SLM as a flexible coupling platform to complement PIC characterization process is proposed and a Haar transform data compression PIC described.