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24 November 2023 Dual-comb pulses in a wavelength multiplexed fiber laser based on multimodal interference filtering effect
Yue Zhao, Kailin Jia, Tengfei Wu, Ying Qin, Li Chen, Guoqing Hu, Huiyu Li, Guangwei Chen, Zhehai Zhou
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Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 1293530 (2023) https://doi.org/10.1117/12.3007705
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China
Abstract
In our work, we experimentally demonstrate wavelength multiplexed dual-comb pulses based on multi-modal interference effect in a passively single-walled carbon nanotube mode-locking all fiber ring laser. The laser cavity achieves a variety of dual-wavelength mode-locked states by switching the polarization controller in the laser cavity. A piece of 25 cm long graded-index multi-mode fiber as a filter based on the multi-mode interference effect is introduced into cavity to fixing wavelength and to improving the signal to noise ratio. With optimized length of multi-mode fiber, we observed the two different filter state which located at 1559 nm and 1562 nm, 1561 nm and 1563 nm respectively in the different polarization dual-comb states. With suitable filtering state by stretching the multi-mode fiber, the two asynchronous pulse sequences coexist with diverse operation, which propagate with singlet and double pulses, respectively. The repetition rate of the laser is 16.59 MHz and the time period corresponding to the asynchronous pulse is ~60 ns. The repetition rate difference of dual-wavelength states reaches 100 Hz. In addition, we recorded the output modulation state of the laser cavity. Our research provides experimental basis for optical fiber sensing, wavelength division multiplexing communication system and high resolution spectroscopy.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Yue Zhao, Kailin Jia, Tengfei Wu, Ying Qin, Li Chen, Guoqing Hu, Huiyu Li, Guangwei Chen, and Zhehai Zhou "Dual-comb pulses in a wavelength multiplexed fiber laser based on multimodal interference filtering effect", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 1293530 (24 November 2023); https://doi.org/10.1117/12.3007705
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KEYWORDS
Optical filters
Fiber lasers
Multimode fibers
Pulse signals
Multiplexing
Optical fibers
Mode locking
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