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15 November 2018 Tunable ultra-broadband microwave frequency combs generation using semiconductor laser injected by intensity-modulated light
Xin Jiang, Nian Fang, Lutang Wang
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Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109645Z (2018) https://doi.org/10.1117/12.2506475
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China
Abstract
This paper proposes and demonstrates a generation scheme of tunable ultra-broadband microwave frequency combs (MFCs) based on a semiconductor laser injected by intensity-modulated (IM) light. The IM light is obtained by current modulating the master semiconductor laser. Then the IM light is injected into the slave semiconductor laser. The influences of the injection strength, frequency detuning, modulation index and modulation frequency on the MFCs generated were investigated by numerically simulating the rate equations of a semiconductor laser with optical injection of IM light. The simulation results show that under appropriate injection parameters, in an amplitude variation range of ±5dB, the bandwidth of the microwave frequency combs can reach over 60GHz, even 108GHz. The comb space of the MFCs can be tuned by the frequency of the modulation signal. Compared with the scheme of optical injection and current modulation into a slave laser, the proposed scheme has an advantage of 28GHz in peak bandwidth of the MFCs generated under the same conditions. In conclusion, the proposed scheme is a simple and effective generation method of tunable ultra-broadband microwave frequency combs.
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Xin Jiang, Nian Fang, and Lutang Wang "Tunable ultra-broadband microwave frequency combs generation using semiconductor laser injected by intensity-modulated light", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109645Z (15 November 2018); https://doi.org/10.1117/12.2506475
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KEYWORDS
Modulation
Frequency combs
Semiconductor lasers
Laser optics
Computer simulations
Nonlinear dynamics
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