## 6 Conclusions
Continuous lasers can be used in propulsion systems, for telescope calibration, and for optical depth instruments (biological experiments in space), to name a few applications. However, the implementation of a modulated current and its effect on the stability of the control will be studied in a future work for other applications such as range estimation (flight formation and space docking), space interferometry, and optical communications applications. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Manufacturer/Authors** & \begin{tabular}{c} **Laser Operating** \\ **Condition** \\ \end{tabular} & \begin{tabular}{c} **Optical Power** \\ **Instabilities** \\ \end{tabular} & \
\begin{tabular}{c} **Features** \\ \end{tabular} \\ \hline [PERSON] et al. [11] & constant temperature & 2\% at maximum &
\begin{tabular}{c} APC, constant current \\ control, constant \\ temperature chamber, \\ and Neural Based PI \\ Controller for \\ power stability. \\ Temperature robust \\ current driver circuit. \\ Constant-Current \\ Driver Circuit, \\ and high-precision \\ Temperature Fuzzy \\ PID Controller. \\ Compact laser driver, \\ current feedback \\ control circuit, \\ thermal protection for \\ laser overheating. \\ APC, CMOS \\ Integrated inverted \\ driver circuit, \\ designed and tested \\ for communication \\ systems (\(<\)100 MHz). \\ Fast APC, designed \\ and tested for \\ communication \\ systems (\(<\)1.2 Gb/s). \\ ADC, laser driver \\ based on PI controller \\ implemented in a \\ low-cost _SOC_. \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 1: A comparison and summary of the main characteristics of the laser controllers cited in the article. **Author Contributions:** Conceptualization, J.P. and M.D. ; methodology, J.P.; formal analysis, J.P.; investigation, J.P., A.B., J.R., C.P. and M.D. ; resources, M.D. and C.P. ; writing--review and editing, J.P., M.D. and A.B. ; funding acquisition, M.D. and J.P. All authors have read and agreed to the published version of the manuscript. **Funding:** This work has been funded by the grants: Agencia Nacional de Investigacion y Desarrollo/Subdireccion de Capital Humano/DOCTORADO NACIONAL 21212105, QUIMAL 190004, FONDECYT Regular 1221907, FONDECYT Regular 1211695, Programa de Investigacion Asociativa (PIA) under Grants ANID ATE 220057 and ANID ATE 220022, Fondo de Equipamiento Cientifico y Tecnologico (FONDEQUIP) under Grant EQM150138 and ANID BASAL project FB210003. In addition, this material is based upon work supported by the Air Force Office of Scientific Research under award number FA9550-22-1-0299. **Acknowledgments:** The authors acknowledge the contributions of referees through their concerns and corrections. **Conflicts of Interest:** The authors declare no conflict of interest. * [PERSON] and [PERSON] (1995) [PERSON]; [PERSON] _PID Controllers: Theory, Design, and Tuning_; ISA--The Instrumentation, Systems and Automation Society: Research Triangle Park, NC, USA, 1995. * [PERSON] et al. (2005) [PERSON]; [PERSON]; [PERSON] _PID Controllers for Time-Delay Systems_; Springer: New York, NY, USA; Berlin/Heidelberg, Germany, 2005; Volume 43. * [PERSON] (2008) [PERSON] Basic Principles of Lasers. In _Field Guide to Laser Pulse Generation_; SPIE Press Bellingham: Bellingham, WA, USA, 2008; Volume 14, pp. 1-15. * [PERSON] and Robinson (1989) [PERSON]; [PERSON]; [PERSON] _The Art of Electronics_; Cambridge University Press: Cambridge, UK, 1989. **Disclaimer/Publisher's Note:** The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.