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A wideband tunable low-noise microwave generation system utilizing optoelectronic oscillator based on the deamplification of stimulated brillouin scattering is demonstrated. Tunable 12–20GHz microwave signals with phase noise of −120dBc/Hz at 10kHz offset are achieved.
A novel high-efficiency 36–50GHz millimeter-wave down-conversion system utilizing an optoelectronic oscillator based on stimulated brillouin scattering is demonstrated. 35–49GHz signals are down-converted to 1GHz IF with −35.72dB conversion-efficiency and without optical or electronic amplifiers.
By suppressing the additive phase noise induced by light scattering in the optical fiber and optical interference due to the optical reflection in a microwave phase noise measurement system using photonic-delay based frequency discriminator, the sensitivity improvement of 10 dB is experimentally achieved. Using the proposed measurement scheme, a single sideband phase noise is measured to be −145 dBc/Hz...
Frequency and full 360° phase tunable microwave signal generation based on an optoelectronic oscillator is experimentally demonstrated. Frequency tunable 8–24 GHz and full 360° phase shift are obtained. The single-sideband phase noise of the generated microwave signal is measured to be −122 dBc/Hz at 10 kHz offset.
10 GHz repetition rate, low timing-jitter and broadband optical comb generation based on a low phase noise optoelectronic oscillator is experimentally demonstrated. 10 GHz repetition rate optical comb and 10 GHz RF signal are obtained, simultaneously. A timing-jitter of 52.8 fs (integral range from 100 Hz to 1 MHz) for the optical comb and a phase noise of −132 dBc/Hz at 10 kHz offset for the RF signal...
A novel 20 GS/s photonic analog-to-digital converter using optical comb based on an optoelectronic oscillator is demonstrated. The timing jitter of the optical sampling pulses is below 54.9 fs and the ENOB is 3.4 bits.
The influence of optical interference induced by reflection of photodiode on the phase noise of optoelectronic oscillator is experimentally investigated. The phase noise at 10-kHz offset is improved by 18-dB through optical interference suppression.
In this paper, we propose a cost effective wavelength reused mode-division-multiplexing (MDM) system for high speed symmetrical bidirectional mobile fronthaul application. At the base band unit (BBU) pool, one of the spatial modes is used to transmit signal carrier while the others are used for downstream signal channels. At the remote radio unit (RRU) side, the signal carrier is firstly mode demultiplexed...
A novel method for high frequency microwave phase noise measurement by photonic microwave down-conversion based on an optoelectronic oscillator is proposed and experimentally demonstrated. The measurement of single-sideband phase noise of the 10–12 GHz microwave signals under test are obtained. The phase noise floor of the measurement system is −140 dBc/Hz at 10 kHz offset.
A novel tunable optoelectronic oscillator utilizing an optical notch filter based on stimulated Brillouin scattering is demonstrated. Tunable 3.36 to 31.4 GHz signals with phase noise of −120 dBc/Hz at 10 kHz offset are obtained.
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