Beam-splitting ratio impact on the SNR for the balanced heterodyne |
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| Affiliation: | 1. Department of Electrical Engineering, Liaoning Vocational College of Light Industry, Dalian, Liaoning 116100, China;2. Department o f Aeronautical & Manufacturing Engineering, Nanchang Hangkong University, Jiangxi 330063, China;1. CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India;2. Academy of Scientific and Innovative Research, CSIR-National Physical Laboratory (Campus), Dr. K. S. Krishnan Road, New Delhi 110012, India;3. CSIR-Network of Institutes for Solar Energy, CSIR-Central Electronics Engineering Research Institute (CSIR-CEERI), Pilani, Rajasthan 333031, India;1. Photonics Research Laboratory (PRL), Department of Electronics and Communication Engineering, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India;2. Photonics Research Laboratory (PRL), Department of Electronics Engineering, Indian School of Mines, Dhanbad 826004, India;1. Institute of Complexity Science, Qingdao University, Qingdao 266071, PR China;2. Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), Université d''Angers, 62 avenue Notre Dame du Lac, 49000 Angers, France;3. Centre for Biomedical Engineering (CBME) and School of Electrical & Electronic Engineering, The University of Adelaide, Adelaide, SA 5005, Australia |
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| Abstract: | Considered the beam-splitting ratio, the mathematical model of balanced heterodyne receiver is established, and the mathematical expression of the relationship between the signal-to-noise ratio and the beam-splitting ratio is obtained. Based on the experiment, we got the best range of beam-splitting ratio which is 0.159–0.5. The experiment results show that, in the framework of the best beam-splitting ratio, the balanced heterodyne receiver has better signal-to-noise ratio than the common heterodyne receiver. |
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| Keywords: | Balanced detection Heterodyne Beam-splitting ratio Signal-to-noise ratio |
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