Ultra-flat multicarrier light source based on recirculating frequency shift loop driven by a parity–time symmetric optoelectronic oscillator

A multicarrier light source based on a recirculating frequency shift loop (RFSL) driven by a parity–time (PT)-symmetric optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The impact of the side-mode suppression ratio (SMSR) of the radio frequency (RF) signal on the multicar...

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Veröffentlicht in:Applied optics (2004) 2023-09, Vol.62 (26), p.6857-6863
Hauptverfasser: Zhou, Jiaxin, Ban, Xinrui, Zhang, Jie, Li, Jiakang, Yang, Jiewei, Jia, Dongfang, Ge, Chunfeng, Wang, Zhaoying
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Sprache:eng
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Zusammenfassung:A multicarrier light source based on a recirculating frequency shift loop (RFSL) driven by a parity–time (PT)-symmetric optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The impact of the side-mode suppression ratio (SMSR) of the radio frequency (RF) signal on the multicarrier is studied for the first time, to our knowledge. The RFSL driven by PT-symmetric OEO significantly optimizes the phase noise and flatness of the multicarrier, facilitating the system miniaturization. In the experiment, a 10.019 GHz RF signal with a SMSR of 42 dB is generated with −98.63dBc/Hz measured phase noise at 10 kHz offset frequency (actual phase noise should be lower than −122.87dBc/Hz). Up to 120 subcarriers with 2.32 dB flatness are obtained successfully, covering the overall bandwidth of approximately 1.2 THz.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.497677