| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Generation of wavelength-tunable, bound-state and noise-like pulses in an all-polarization-maintaining laser ring cavity based on nonlinear polarization evolution |
| Yazhou Shi(石亚洲), Ze Li(李泽), and Zhiguo Lv(吕志国)† |
| School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China |
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Abstract Wavelength-tunable fiber lasers are of great interest due to their ability to meet the needs of multiple wavelengths simultaneously. In this work, a tuned spectrum of 13 nm (1564.5–1577.5 nm) is obtained using the nonlinear polarization evolution (NPE) technique by adjusting the polarization controller (PC) to use six segments of polarization-maintaining (PM) fibers with specific splicing angles in an all-PM ring cavity. The output pulse characteristics are also measured, and the signal-to-noise ratio (SNR) is greater than 74 dB. A soliton pulse with a pulse width of about 469 fs is generated at a repetition frequency of 14.12 MHz, which demonstrates the excellent performance of the fiber laser. In addition, by changing the cavity parameters and adjusting the PC, bound states and noise-like pulses are generated in the six-segment structure. So far, the generation of these two types of pulses has not been reported in other PM NPE structured fiber lasers, and the formation mechanism may be related to the complex nonlinear interactions in mode-locked fiber lasers. Our work demonstrates the potential of the PM NPE structure for applications in broad spectral tuning as well as in the generation of multiple pulse types.
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Received: 15 August 2025
Revised: 08 October 2025
Accepted manuscript online: 22 October 2025
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.60.-v
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(Laser optical systems: design and operation)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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42.65.-k
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(Nonlinear optics)
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| Fund: Project supported by the Natural Science Foundation of Inner Mongolia Autonomous Region of China (Grant No. 2025MS01009), the National Natural Science Foundation of China (Grant No. 12164030), and Science and Technology Plan Projects of Inner Mongolia Autonomous Region of China (Grant No. 2023KYPT0012). |
Corresponding Authors:
Zhiguo Lv
E-mail: lvzhiguo@imu.edu.cn
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Cite this article:
Yazhou Shi(石亚洲), Ze Li(李泽), and Zhiguo Lv(吕志国) Generation of wavelength-tunable, bound-state and noise-like pulses in an all-polarization-maintaining laser ring cavity based on nonlinear polarization evolution 2026 Chin. Phys. B 35 054202
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