Linear dual-chirp microwave waveforms generation based on period-one state of integrated mutual injection laser

Shilin Chen; Tao Pu; Li Wang; Jilin Zheng; Gengze Wu; Jin Li

doi:10.1117/12.3007643

24 November 2023 Linear dual-chirp microwave waveforms generation based on period-one state of integrated mutual injection laser

Shilin Chen, Tao Pu, Li Wang, Jilin Zheng, Gengze Wu, Jin Li

Author Affiliations +

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129352H (2023) https://doi.org/10.1117/12.3007643
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

The integrated mutual injection laser consists of a front section laser (FSL), a phase-section laser and a rear section laser (RSL). By adjusting the current of the two DFB lasers, the cavity modes of the FSL and RSL coexist in a period-one (P1) state, and the integrated laser is a dual-mode output. The beat frequency (fLO) can be obtained as the optical local oscillator (LO) frequency. When the linear frequency modulation (LFM) signal is directly modulated onto the front section laser of the integrated laser, after passing through the photodetector, the two main oscillation modes will beat with the first-order optical modulation sideband of the other mode, thereby generating the new frequency signals (f_LO±f_LFM). When the fundamental frequency signal or fLO is tuned, a double chirp signal with opposite chirp rate can be generated in different frequency ranges. In the simulation experiment demonstration, DCMWs in the frequency range of 11~17 GHz and 5~9 GHz are obtained respectively, and the corresponding time bandwidth product (TBWP) reaches 800. The full width at half maximum (FWHM) can reach 0.272 ns, and the peak sidelobe ratio (PSR) can reach 21.45 dB. The scheme is beneficial to further enrich the transmitting frequency band of radar detection signal. The principle is simple, the integration is high, the operation is convenient, and the frequency is adjustable.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Shilin Chen, Tao Pu, Li Wang, Jilin Zheng, Gengze Wu, and Jin Li "Linear dual-chirp microwave waveforms generation based on period-one state of integrated mutual injection laser", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129352H (24 November 2023); https://doi.org/10.1117/12.3007643

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