Dual-chirp Fourier domain mode-locked optoelectronic oscillator

Hao, Tengfei; Tang, Jian; Shi, Nuannuan; Li, Wei; Zhu, Na; Li, Ming

doi:10.1364/ol.44.001912

Cited by 53 publications

(16 citation statements)

References 21 publications

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“…So far, a number of photonic methods of generating dual-chirp microwave waveforms have been reported. In [15]- [19], the dual-chirp microwave waveforms are obtained based on a DPMZM [15], two cascaded MZMs [16], a DP-DPMZM [17], a Fourier domain mode-locked optoelectronic oscillator [18], and an optically injected semiconductor laser [19]. However, the above-mentioned approaches are only utilized to generate microwave waveforms in a single format.…”

Section: Introductionmentioning

confidence: 99%

Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

Shi

Jia

et al. 2021

IEEE Photonics J.

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We propose a photonic scheme to generate binary phase-coded microwave pulses and dual-chirp microwave waveforms without baseband-modulated signals (background noise) based on a dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) which contains x-DDMZM and y-DDMZM at two different polarization states. A radio frequency (RF) signal from a microwave source is transferred into two differential RF signals and employed into one arm of x-DDMZM and one arm of y-DDMZM, while a baseband signal from an arbitrary waveform generator is divided by an electronic coupler and then driven into the two other arms of DP-DDMZM. By adjusting the phase differences between the x-DDMZM and the y-DDMZM, binary phase-coded pulses and dual-chirp signals without baseband-modulated signals are generated. The proposed scheme can eliminate the interference caused by baseband-modulated signals, and satisfy different radar applications for different frequency bands. Experimental results show that phasecoded signals at 15 GHz with the bit rates of 1 Gb/s and 2 Gb/s and dual-chirp signals at 10 GHz and 15 GHz with the time durations of 0.5 μs are successfully generated. The reported scheme is well analyzed in theory and verified by experiment.

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Section: Introductionmentioning

confidence: 99%

Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

Shi

Jia

et al. 2021

IEEE Photonics J.

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“…Another method of generating LCMWs is using a Fourier domain mode locking (FDML) optoelectronic oscillator (OEO) [18]- [21]. The kernel of an FDML OEO is constructing a microwave photonic filter (MPF) whose passband center frequency is fast scanning.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, a complementary LCMW pair can be generated in an FDML OEO through constructing a dual-passband MPF with its two passbands fast scanning in the opposite direction. In [21], a fast-scanning dual-passband MPF is realized based on phase-modulationto-intensity-modulation (PM-IM) conversion by using a phase-shifted fiber Bragg grating and two laser diodes driven by opposite triangle-wave currents. Through employing this MPF in the OEO, a complementary LCMW pair with a duration of 22.22 µs has been generated in a single frequency band, whose center frequency can be tuned from 9.7 GHz to 10.3 GHz, and operation bandwidth can vary from 2 GHz to 3.4 GHz.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Sweep-Range-Reconfigurable Complementary Linearly Chirped Microwave Waveform Pair Generation by Using a Fourier Domain Mode Locking Optoelectronic Oscillator Based on Stimulated Brillouin Scattering

et al. 2020

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A Fourier domain mode locking (FDML) optoelectronic oscillator (OEO) based on stimulated Brillouin scattering (SBS) is proposed to generate complementary linearly chirped microwave waveform (LCMW) pairs with flexibly-reconfigurable frequency sweep range and excellent frequency sweep linearity. The FDML OEO involves an SBS-based dual-passband microwave photonic filter with its two passbands linearly and fast scanning in the opposite direction at an identical frequency sweep rate, which is realized by using a single laser source to obtain a fast frequency sweep probe light and a two-tone pump light through electro-optic modulation. A proof-of-concept experiment is carried out to demonstrate the proposed scheme. In the experiment, frequency-sweep-range-reconfigurable complementary LCMW pairs with period of 20.5 µs are generated in the range of 5 GHz to 18 GHz, where the maximum time-bandwidth product and chirp rate are 82000 and ±0.195 GHz/µs, respectively. Most importantly, the frequency sweep linearity is measured to be 1.76%, which is much better than the results obtained in the existing FDML OEOs.

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“…However, the central frequency and the bandwidth of the generated signal are limited to multi-GHz due to the relatively low sampling rate of the digital-to-analog converter (DAC) available in the DDS [6], [7]. In order to overcome this limitation confronted by electronic approach, several photonics-assisted dual-chirp microwave signal generation schemes have been proposed in recent years due to the prominent advantages of photonic technology such as ultra-broad bandwidth and immunity to electromagnetic interferences [8]- [18]. A photonics-assisted dual-chirp microwave signal generation scheme was first proposed and demonstrated based on a single dual-parallel Mach-Zehnder modulator (DPMZM) [10].…”

Section: Introductionmentioning

confidence: 99%

“…Other approaches to generating a frequency-and bandwidth-multiplied dual-chirp microwave signal have also been demonstrated based on various polarization multiplexed electro-optic modulators such as a dual-polarization quadrature phase shift keying (DP-QPSK) modulator [13]- [15] and a dual-polarization binary phase shift keying (DP-BPSK) modulator [16], [17]. Another approach to generating a dual-chirp microwave signal is based on Fourier domain mode-locking (FDML) optoelectronic oscillator (OEO) [18]. In the OEO cavity, an opposite frequency-scanning dual-passband microwave photonic filter (MPF) is constructed based on phase-to-intensity modulation conversion by using an optical notch filter and two laser diodes driven by triangle current.…”

Section: Introductionmentioning

confidence: 99%

Photonics-Assisted Bandwidth-Doubling Dual-Chirp Microwave Signal Generation With Freely-Tunable Central Frequency

et al. 2020

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A photonics-assisted dual-chirp microwave signal generation scheme is proposed based on electro-optic modulation and heterodyne detection. The dual-chirp microwave signal is generated by heterodyne beating between a dual-chirp optical waveform and a frequency-shifted optical carrier, where the dual-chirp optical waveform is obtained by applying a baseband symmetric-triangle linear frequency modulated signal to a Mach-Zehnder modulator biased at the minimum transmission point, and the frequency-shifted optical carrier is obtained by carrier-suppressed single-sideband modulation in a dual-parallel Mach-Zehnder modulator (DPMZM) with the assistance of an electronic 90° hybrid. The bandwidth of the generated dual-chirp microwave signal is twice of that of the input baseband signal, and the central frequency can be tuned by varying the frequency of the single-tone microwave signal applied to the DPMZM. Both numerical simulation and experiment are carried out to demonstrate the proposed scheme. In the simulation, a dual-chirp microwave signal with a center frequency of 15 GHz and a bandwidth of 6 GHz is generated. In the proof-of-concept experiment, dual-chirp microwave signals centered at 1.5 GHz and with bandwidth of 100 MHz and 200 MHz are generated, which verifies the feasibility of the proposed scheme.

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Dual-chirp Fourier domain mode-locked optoelectronic oscillator

Cited by 53 publications

References 21 publications

Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

Frequency-Sweep-Range-Reconfigurable Complementary Linearly Chirped Microwave Waveform Pair Generation by Using a Fourier Domain Mode Locking Optoelectronic Oscillator Based on Stimulated Brillouin Scattering

Photonics-Assisted Bandwidth-Doubling Dual-Chirp Microwave Signal Generation With Freely-Tunable Central Frequency

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