**5. Conclusion**

*Telecommunication Systems – Principles and Applications of Wireless-Optical Technologies*

initial and optimized holograms). Nonetheless, the loss of 1.1 dB identified on the mean beam power for the optimized CGH, an improved equalization between the

**Beam Initial CGH (u.a.) Optimized CGH (u.a.)**

*Gaussian fit (Gauss fit, blue line) of smoothed integrated intensity signal from the replay field image (SSG, red* 

**Initial CGH (%) Optimized CGH (%)**

 6.30 5.12 8.21 5.78 7.18 6.37 7.69 5.51 Mean 7.35 ± 0.81 5.69 ± 0.52 Std (%) 11.17 9.14

*δd*1 19.76 7.48 *δd*2 1.96 2.90 *δd*3 14.31 9.44

beams was observed, with a 2% reduction in the standard deviation [23]. Algorithm improvements should be implemented to mitigate the power discrepancies between the four beams and optical artifacts associated with the diffraction of light, with the objective of mitigating the signal loss at the output of

**128**

**Table 2.**

**Figure 10.**

**Table 1.**

*dots) of final optimized CGH [23].*

*Error factor (δ) values for d1, d2, and d3.*

the optical chip.

*Integration of the intensity profiles for the four beams.*

LCoS SLM technology implementation has been gaining importance in optical system applications, like telecom with the development of high-capacity optical components in system functionalities as switching (in ROADM), multiplexing and demultiplexing, and optical signal processing. In this chapter, a proof of concept on the implementation of a new SLM-based flexible coupling platform has been provided. We have also explored its implementation for applications in SDM systems and PIC characterization/testing. Furthermore, optimized methodologies to generate the CGH were developed and implemented. Main results include (i) BER = 1.2 × 10<sup>−</sup><sup>3</sup> for a SDM system, i.e., the use of the SLM to efficiently excite the different cores of a MCF, and (ii) CGH (δ ≤ 1.5%) to feed/receive the output of an optical chip for data compression based on the HT. The demonstrations pave the way for the potential use of the SLM flexible platform in the development of multidimensional optical systems, by providing a versatile optical method which can overcome impairments introduced by the optical path in a MCF (e.g., by improving the setup alignment and excitation of different cores in MCF) and deliver a more robust optical methodology to assess and test photonic processors (e.g., offering a proof of concept of the PIC HT operation).
