A photonic scheme for the generation of dual linear chirp microwave waveform based on the external modulation technique and its airborne application

Kumar, Ritesh; Raghuwanshi, Sanjeev Kumar

doi:10.1007/s11082-017-1206-1

Cited by 26 publications

(3 citation statements)

References 13 publications

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“…The reflected power from π PS-FBG is shown in the optical spectrum analyzer. This reflected power of 5 dBm is achieved at 1.550µm wavelength, as shown in Figure (5). The proposed OEO system has generated a microwave signal with a tuning range of 4.6-40.17 GHz at 1.550µm of career wavelength and an absolute power level of 16 dBm at 4.6 GHz to 40.17 GHz achieving a minimum power of -30 dBm; the maximum adjustable frequency is 40.17 GHz, as shown in Figure (6).…”

Section: Resultsmentioning

confidence: 75%

Photonic assisted arbitrary microwave signal generation based on opto-electronic oscillator

Nadeem,

Raghuwanshi,

Raj

et al. 2023

Optoelectronic Devices and Integration XII

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Section: Resultsmentioning

confidence: 75%

Photonic assisted arbitrary microwave signal generation based on opto-electronic oscillator

Nadeem,

Raghuwanshi,

Raj

et al. 2023

Optoelectronic Devices and Integration XII

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“…In references 25–27, two single‐drive MZM are cascaded at minimum transmission point, to suppress carrier signal in the modulated output, and in push‐pull mode as shown in Figure 2B. Relatively larger bandwidth has been claimed by the authors.…”

Section: Various Methods For Dual‐chirp Microwave Generationmentioning

confidence: 99%

A review on photonic‐assisted dual‐chirp microwave waveform generation methods

Kumar,

Raghuwanshi,

Yadav

2024

Micro & Optical Tech Letters

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In recent times, photonic synthesis and processing of arbitrary microwave waveforms have gained interest due to their high frequency and huge time–bandwidth product. This study reviews methods for producing dual‐chirp microwave waveforms, focusing mostly on system topologies based on external modulation techniques, such as cascaded Mach–Zehnder modulator (MZM), dual parallel MZM, and dual polarized MZM. Other photonic approaches, like using semiconductor laser and optical heterodyne detection methods, are also discussed. These techniques are preferable because of high frequency, enhanced time–bandwidth product, greater chirp rate, and many more advantages. Additionally, the difficulties associated with integrating the systems into real‐world applications are also addressed.

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“…After photodetection (PD), a dual-chirp microwave signal with its chirp rate and duration (i.e., bandwidth) identical to those of the baseband single-chirp waveform and its central frequency identical to the single-tone RF signal, is generated through heterodyne beat between the modulation sidebands. In order to enhance the operation frequency and bandwidth, schemes based on two cascaded MZMs have been proposed [11], [12]. In [11], a single-tone RF signal with a frequency of 1 f is applied to the first MZM biased at the minimum transmission point, and a single-chirp waveform with a central frequency of f and a quadrupling-bandwidth of the input single-chirp waveform is generated after photodetection.…”

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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A photonic scheme for the generation of dual linear chirp microwave waveform based on the external modulation technique and its airborne application

Cited by 26 publications

References 13 publications

Photonic assisted arbitrary microwave signal generation based on opto-electronic oscillator

Photonic assisted arbitrary microwave signal generation based on opto-electronic oscillator

A review on photonic‐assisted dual‐chirp microwave waveform generation methods

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

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