caa a22 4500 606244247 CHVBK 20210128101329.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s12596-015-0235-z doi (NATIONALLICENCE)springer-10.1007/s12596-015-0235-z Design and demonstration of hardware efficient OPLL for generation of stable microwave signals by optical heterodyning [Elektronische Daten] [K. Prasad, T. Srinivas, D. Ramana] Generation of microwave signals by optical heterodyning has been an active area of research in the field of Microwave Photonics. Though this approach offers great flexibility in choosing the microwave frequency, issues related to frequency stability and phase noise performance are inherent to it. The effect of laser phase noise on heterodyned output is mathematically analyzed, simulated and practically demonstrated. Design of hardware-efficient Optical Phase Locked Loop (OPLL) that overcomes the issues of phase noise and frequency instability is proposed. Frequency stability and phase noise tracking achieved by the proposed OPLL is demonstrated experimentally. Highly stable microwave signals, exhibiting phase noise as low as −105 dBc/Hz at 10 KHz offset (limited by the phase noise of the reference source used in the experiment), are successfully generated by the proposed approach. The generated microwave signals have been shown to be devoid of spurious components and harmonics. The Optical Society of India, 2015 Optical phase locked loop nationallicence Optical heterodyning nationallicence Microwave generation nationallicence Prasad K. Department of ECE, IISc, Bangalore, India aut Srinivas T. Department of ECE, IISc, Bangalore, India aut Ramana D. Communications Systems Group, ISRO Satellite Centre, Vimanapura Post, Bangalore, India aut Journal of Optics Springer India 44/2(2015-06-01), 103-118 0972-8821 44:2<103 2015 44 12596 https://doi.org/10.1007/s12596-015-0235-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-015-0235-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prasad K. Department of ECE, IISc, Bangalore, India aut NATIONALLICENCE 700 1- Srinivas T. Department of ECE, IISc, Bangalore, India aut NATIONALLICENCE 700 1- Ramana D. Communications Systems Group, ISRO Satellite Centre, Vimanapura Post, Bangalore, India aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/2(2015-06-01), 103-118 0972-8821 44:2<103 2015 44 12596