Experimental Demonstration of Single Sideband Modulation Utilizing Monolithic Integrated Injection Locked DFB Laser

Zhang, Yunshan; Yuan, Bocheng; Li, Lianyan; Zeng, Jie; Shang, Zijun; Zheng, Jilin; Lu, Zuye; Guan, Shijian; Zhang, Xing; Xiao, Rulei; Fang, Tao; Shi, Yuechun; Zou, Hui; Shen, Jianheng; Chen, Xiangfei

doi:10.1109/jlt.2019.2959796

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Fiber transmission enables the conversion of RF signals to optical signals through electro-optic modulation and modulation-demodulation techniques, which are then transmitted and restored to RF signals through photoelectric conversion at the receiving end. Direct modulation lasers (DMLs) offer high modulation bandwidth, enabling high-speed data transmission to meet the demands of large-scale data transfer [11,12] . Additionally, DMLs achieve real-time performance and low latency, making them suitable for applications requiring quick response and real-time performance.…”

Section: Introductionmentioning

confidence: 99%

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Yin,

Zhang,

Guan

et al. 2024

中国光学快报

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The stable long-distance transmission of radio-frequency (RF) signals holds significant importance from various aspects, including the comparison of optical frequency standards, remote monitoring and control, scientific research and experiments, and RF spectrum management. We demonstrate a scheme where an ultrastable frequency signal was transmitted over a 50 km coiled fiber. The optical RF signal is generated using a two-section distributed feedback (DFB) laser for direct modulation based on the reconstruction equivalent chirp (REC) technique. The 3-dB modulation bandwidth of the two-section DFB laser is 18 GHz and the residual phase noise of −122.87 dBc=Hz is achieved at 10-Hz offset frequency. We report a short-term stability of 1.62 × 10 −14 at an average time of 1 s and a long-term stability of 6.55 × 10 −18 at the measurement time of 62,000 s when applying current to the front section of the DFB laser. By applying power to both sections, the stability of the system improves to 4.42 × 10 −18 within a testing period of 56,737 s. Despite applying temperature variations to the transmission link, long-term stability of 8.63 × 10 −18 at 23.9 h can still be achieved.

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Section: Introductionmentioning

confidence: 99%

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Yin,

Zhang,

Guan

et al. 2024

中国光学快报

Self Cite

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show abstract

“…Therefore, several schemes have been proposed to solve these problems using single sideband (SSB) modulation. These schemes include: using an optical filter to filter out one undesired sideband [ 16 ], using the stimulated Brillouin scattering (SBS) effect in the fiber to amplify one sideband [ 17 ], using vestigial sideband filtering combined with OCS to generate optical SSB signals [ 18 ], using an injection-locked semiconductor laser to amplify one modulation sideband [ 19 ], and combining a 90° hybrid coupler with a quadrature-biased dual-drive Mach–Zehnder modulator (DDMZM) [ 20 ]. These approaches are usually used to obtain optical SSB signals in optical communication systems, which can improve spectral efficiency, avoid signal degradation caused by the dispersion-induced power fading [ 20 ], and reduce the bit error rate.…”

Section: Introductionmentioning

confidence: 99%

Photonic generation of ASK microwave signals with SSB format

Gou

Zhang

2023

Front. Optoelectron.

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Optical beating is the usual approach to generation of microwave signals. However, the highest frequency achievable for microwave signals is limited by the bandwidths of optoelectronic devices. To maximize the microwave frequency with a limited bandwidth of a photodetector (PD) and relieve the bandwidth bottleneck, we propose to generate microwave signals with the single sideband (SSB) format by beating a continuous wave (CW) light with an optical SSB signal. By simply adjusting the frequency difference between the CW light and the carrier of the optical SSB signal, the frequency of the generated microwave SSB signal is changed correspondingly. In the experiment, amplitude shift keying (ASK) microwave signals with the SSB format are successfully generated with different carrier frequencies and coding bit rates, and the recovered coding information agrees well with the original pseudo random binary sequence (PRBS) of 27 − 1 bits. The proposed approach can significantly relieve the bandwidth restriction set by optoelectronic devices in high-speed microwave communication systems. Graphical Abstract

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Integrated Direct Single Sideband Modulation Utilizing Sideband Amplification Injection Locking Effect Based on Multi-Section Mutual Injection DFB Laser

Zhang

Zheng

et al. 2021

J. Lightwave Technol.

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Experimental Demonstration of Single Sideband Modulation Utilizing Monolithic Integrated Injection Locked DFB Laser

Cited by 6 publications

References 24 publications

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Photonic generation of ASK microwave signals with SSB format

Integrated Direct Single Sideband Modulation Utilizing Sideband Amplification Injection Locking Effect Based on Multi-Section Mutual Injection DFB Laser

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